The impact of UV Absorber UV-1130 on coating adhesion and flexibility

The Impact of UV Absorber UV-1130 on Coating Adhesion and Flexibility

Introduction

When we think about coatings—whether it’s the glossy finish on your car, the protective layer on a wooden table, or even the thin film on a smartphone screen—we often don’t consider what goes into making them last. But behind every durable coating is a cocktail of additives, each with its own unique role in ensuring that what you see stays looking good for years to come.

One such unsung hero is UV absorber UV-1130, a chemical compound designed to shield materials from the sun’s harmful ultraviolet rays. While UV protection is its primary job, recent studies suggest that UV-1130 also plays a surprising role in influencing two key mechanical properties of coatings: adhesion and flexibility.

In this article, we’ll take a deep dive into how UV-1130 affects these properties, explore its chemical characteristics, and look at real-world applications where this additive proves invaluable. We’ll sprinkle in some technical details, but keep things light and engaging—because science doesn’t have to be boring!

What Exactly Is UV-1130?

UV-1130, chemically known as 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, is part of the benzotriazole family of UV absorbers. These compounds are widely used in polymers, coatings, inks, and adhesives due to their ability to absorb UV radiation and convert it into harmless heat energy.

Let’s break down some of its basic physical and chemical properties:

Property	Value/Description
Chemical Formula	C₂₉H₂₆N₄O
Molecular Weight	442.5 g/mol
Appearance	Light yellow powder
Solubility in Water	Practically insoluble
UV Absorption Range	300–380 nm
Compatibility	Compatible with most resins (polyesters, polyurethanes, acrylics, etc.)
Thermal Stability	Stable up to ~200°C

UV-1130 is particularly favored for its high molar extinction coefficient, meaning it can absorb UV light efficiently even at low concentrations. This makes it both cost-effective and effective at protecting materials from photodegradation.

The Role of UV Absorbers in Coatings

Before we jump into the main act—how UV-1130 impacts adhesion and flexibility—it’s important to understand why UV absorbers are even necessary in coatings.

Sunlight, especially the UV component, is one of the most destructive forces when it comes to organic materials like polymers and resins. Prolonged exposure leads to:

Chain scission (breaking of polymer chains)
Crosslinking (which can make materials brittle)
Color fading
Loss of gloss
Cracking and peeling

UV absorbers like UV-1130 work by intercepting UV photons before they can wreak havoc on the molecular structure of the coating. They’re like sunscreen for surfaces—except instead of protecting skin, they protect our cars, furniture, and industrial equipment.

But here’s the twist: while UV-1130 is primarily added for UV protection, its presence can subtly—but significantly—affect other performance aspects of the coating, including adhesion and flexibility.

Adhesion: Sticking Around Matters

Adhesion refers to the ability of a coating to stick firmly to the surface beneath it—the substrate. Without proper adhesion, even the toughest, shiniest paint will eventually flake off like old nail polish.

So, how does UV-1130 influence this? Let’s take a closer look.

Mechanism of Influence

UV-1130 is typically added during the formulation stage of coatings. Since it’s not reactive per se, it remains dispersed within the resin matrix. However, its hydrophobic nature and molecular size can affect how well the coating wets the substrate during application.

Think of it like adding oil to water—it doesn’t mix easily. If UV-1130 isn’t evenly distributed or if it migrates to the surface too quickly, it can create a barrier between the coating and the substrate, reducing adhesion.

On the flip side, when properly formulated and stabilized, UV-1130 can enhance long-term adhesion by preventing UV-induced degradation at the interface between the coating and the substrate.

Experimental Findings

A 2019 study published in Progress in Organic Coatings investigated the effect of various UV absorbers on the adhesion of polyester-based coil coatings. The researchers found that UV-1130, when used at concentrations between 0.5% and 2.0%, had minimal impact on initial adhesion but significantly improved long-term adhesion retention after accelerated weathering tests (ASTM G154).

Here’s a summary of their results:

UV Additive	Initial Adhesion (Cross-hatch Test)	After 500h UV Exposure	Notes
None	5B	1B	Significant loss
UV-1130 (1%)	5B	4B	Minor degradation
UV-327	5B	3B	Moderate degradation

This shows that while UV-1130 didn’t hinder initial bonding, it helped preserve the bond under UV stress—an important consideration for outdoor applications.

Flexibility: Bending Without Breaking

Flexibility is another crucial property, especially in coatings applied to substrates that experience movement, bending, or temperature fluctuations. A flexible coating can withstand mechanical stress without cracking or delaminating.

Now, how does UV-1130 play into this?

The Molecular Dance

Coating flexibility is largely dictated by the mobility of polymer chains. If the chains are free to move, the coating remains pliable. If they’re rigid or crosslinked, the coating becomes brittle.

UV-1130 itself is a relatively large molecule. When incorporated into a resin system, it can either plasticize the system slightly or, conversely, interfere with chain mobility depending on concentration and compatibility.

Too much UV-1130 can cause phase separation, which may reduce flexibility. But at optimal levels, it can actually improve flexibility retention over time by slowing down oxidative and photochemical degradation processes that lead to embrittlement.

Real-World Testing

In a comparative study conducted by BASF (internal technical report, 2020), different UV stabilizers were tested in automotive clear coats. The samples were subjected to repeated bending tests before and after UV aging.

UV Additive	Initial Flexibility (Mandrel Bend)	After 1000h UV Exposure	Notes
None	Pass (1/8" mandrel)	Fail	Severe cracking
UV-1130	Pass	Pass	Minimal change
UV-326	Pass	Borderline pass	Slight microcracking observed

This data suggests that UV-1130 not only protected against UV damage but also helped maintain the original flexibility of the coating—a double win!

Balancing Act: Dosage and Formulation Matter

As with many things in life, moderation is key. Too little UV-1130, and you risk inadequate UV protection; too much, and you might compromise adhesion and flexibility.

Most manufacturers recommend using UV-1130 in the range of 0.5% to 2.0% by weight, depending on the resin system and expected service conditions.

Here’s a quick dosage guide based on typical applications:

Application Type	Recommended Dose (wt%)	Notes
Automotive coatings	1.0 – 2.0	High durability required
Wood finishes	0.5 – 1.0	Lower exposure than automotive
Coil coatings	1.0 – 1.5	Industrial environments, needs long-term stability
Plastics (film & sheet)	0.2 – 0.5	Thin sections require lower loading

To ensure uniform dispersion and avoid issues like blooming or migration, UV-1130 should be added early in the formulation process and thoroughly mixed. Using dispersants or compatibilizers can help improve its integration into the matrix.

Case Studies: Where Theory Meets Reality

Let’s take a look at a couple of case studies that highlight UV-1130’s dual role in enhancing UV protection while maintaining or improving mechanical properties.

Case Study 1: Outdoor Furniture Coatings

A major European furniture manufacturer was facing complaints about premature chalking and peeling of their outdoor wood coatings. Upon analysis, it was found that the existing formulation lacked adequate UV protection.

They switched to a system incorporating UV-1130 at 1.2%, along with HALS (hindered amine light stabilizer) for synergistic protection.

After 18 months of real-world exposure in Mediterranean climates:

Chalking was reduced by over 70%
Adhesion remained above 4B on the cross-hatch test
Flexibility passed a 1/4” mandrel bend test

Customer satisfaction soared, and warranty claims dropped significantly.

Case Study 2: Automotive Clearcoat

An Asian OEM faced challenges with clearcoat cracking on vehicle hoods exposed to prolonged sunlight. Laboratory testing revealed UV degradation as the root cause.

By integrating UV-1130 at 1.5% into the clearcoat formulation, they achieved:

No visible cracks after 1500 hours of QUV testing
Maintained gloss levels (>85 GU at 60° angle)
Passed all adhesion and flexibility tests post-exposure

This case clearly illustrates UV-1130’s effectiveness in high-stress environments.

Comparing UV-1130 to Other UV Absorbers

While UV-1130 is a strong performer, it’s always useful to compare it with similar products to understand its niche.

Parameter	UV-1130	UV-327	UV-326
UV Absorption Range	300–380 nm	300–375 nm	300–360 nm
Molecular Weight	442.5 g/mol	400.5 g/mol	367.4 g/mol
Solubility in Resins	Good	Moderate	Low
Cost	Moderate	Higher	Lower
Migration Tendency	Low	Moderate	High
Effect on Adhesion	Neutral to positive	Neutral	Slightly negative
Effect on Flexibility	Positive over time	Neutral	Negative at high doses

From this comparison, UV-1130 emerges as a balanced choice—offering broad UV absorption, low migration, and better long-term mechanical performance compared to alternatives like UV-326 and UV-327.

Environmental and Safety Considerations

No discussion of modern additives would be complete without touching on safety and environmental impact.

UV-1130 is generally considered safe for industrial use, though appropriate handling procedures should be followed to prevent inhalation or skin contact. According to the REACH regulation in the EU, UV-1130 is registered and classified as non-hazardous under normal usage conditions.

However, like many organic chemicals, its environmental fate is still being studied. Some research (e.g., Environmental Science & Technology, 2021) has raised concerns about the persistence of benzotriazole derivatives in aquatic systems. As such, disposal should follow local regulations, and efforts are underway to develop more biodegradable UV stabilizers.

Conclusion: More Than Just a Sunscreen

In conclusion, UV-1130 is far more than just a UV blocker—it’s a multitasker in the world of coatings. Its ability to preserve both adhesion and flexibility under UV stress makes it an indispensable tool for formulators aiming to extend the lifespan of their products.

Whether you’re designing a new automotive finish, developing a marine coating, or formulating a durable wood stain, UV-1130 offers a compelling combination of performance, versatility, and reliability.

Of course, like any additive, it must be used wisely. Proper formulation, dosage control, and compatibility testing are essential to unlock its full potential. But when done right, UV-1130 doesn’t just protect against the sun—it helps your coating stay bonded, bendable, and beautiful for years to come. 🌞✨

References

Zhang, L., Wang, Y., & Li, H. (2019). "Effect of UV Absorbers on Long-Term Adhesion Retention of Polyester Coil Coatings." Progress in Organic Coatings, 132, 152–160.
BASF Technical Report. (2020). "Performance Evaluation of UV Stabilizers in Automotive Clearcoats." Internal Publication.
Liu, X., Chen, J., & Zhao, W. (2021). "Migration Behavior and Mechanical Properties of Benzotriazole UV Absorbers in Polyurethane Coatings." Journal of Coatings Technology and Research, 18(4), 901–912.
European Chemicals Agency (ECHA). (2022). "REACH Registration Dossier for UV-1130."
Smith, R., & Kumar, A. (2021). "Environmental Fate of Benzotriazole Derivatives: A Review." Environmental Science & Technology, 55(6), 3001–3015.
Nippon Kayaku Co., Ltd. (2020). "Technical Data Sheet for UV-1130."
American Society for Testing and Materials (ASTM). (2018). "Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Photodegradable Plastics (ASTM G154)."

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Developing high-solid and low-VOC formulations with UV Absorber UV-1130

Developing High-Solid and Low-VOC Formulations with UV Absorber UV-1130

When it comes to formulating coatings, paints, or inks, the modern chemist is often caught between two opposing forces: performance and environmental responsibility. On one hand, you want a product that lasts — resistant to sunlight, heat, moisture, and time itself. On the other, you’re under pressure to reduce volatile organic compound (VOC) emissions and increase solids content. It’s like trying to have your cake and eat it too, but with less sugar and more fiber.

Enter UV Absorber UV-1130, a compound that may just be the unsung hero of this balancing act. In this article, we’ll explore how UV-1130 can help formulators develop high-solid, low-VOC systems without compromising on durability or protection from UV degradation. We’ll dive into its chemical properties, discuss practical formulation strategies, compare it with other UV stabilizers, and sprinkle in some real-world data for good measure. So grab your lab coat (and maybe a cup of coffee), and let’s get started.

🧪 What Exactly Is UV-1130?

UV-1130 is a hydroxyphenyl benzotriazole-type UV absorber, known for its excellent light-stabilizing properties. It’s commonly used in coatings, plastics, and adhesives to protect materials from ultraviolet radiation-induced degradation. Its molecular structure allows it to absorb harmful UV rays and dissipate them as harmless heat energy, preventing the breakdown of polymers and other sensitive components in formulations.

Let’s take a look at its basic physical and chemical parameters:

Property	Value
Chemical Name	2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol
Molecular Formula	C₂₉H₂₆N₂O
Molecular Weight	~414.5 g/mol
Appearance	Light yellow powder
Melting Point	148–154°C
Solubility in Water	Insoluble
Solubility in Organic Solvents	Good
UV Absorption Range	300–380 nm
CAS Number	1843-05-6

One of the key advantages of UV-1130 is its low volatility, which makes it especially suitable for high-solids systems where solvent levels are minimized. Unlike many traditional UV absorbers that tend to evaporate during curing or application, UV-1130 stays put, offering long-term protection.

🌞 Why UV Protection Matters in Coatings

Before we dive deeper into UV-1130’s role, let’s talk about why UV protection is so critical in coatings and related applications.

Sunlight contains ultraviolet radiation — invisible to the human eye but highly destructive to polymers. When UV photons strike a polymer chain, they can cause bond cleavage, leading to:

Color fading
Chalking
Cracking
Loss of gloss
Mechanical failure

In short, UV exposure ages materials prematurely. That’s why UV absorbers are not just nice-to-have additives; they’re essential for extending the service life of exterior products like automotive finishes, wood coatings, architectural paints, and industrial resins.

Now, here’s the catch: many traditional UV absorbers come with their own baggage — namely, high VOC content and poor compatibility with high-solids systems. This is where UV-1130 shines (pun very much intended).

🚫 The Problem with Traditional UV Absorbers

Many older-generation UV absorbers — such as benzophenones and certain benzotriazoles — suffer from several drawbacks when used in modern, eco-friendly formulations:

High Volatility: They tend to evaporate during baking or air-drying processes, reducing effectiveness.
Poor Compatibility: Can bloom or migrate within the film, causing surface defects.
Limited Solubility: Especially problematic in low-solvent or waterborne systems.
Environmental Concerns: Some have raised toxicity flags or regulatory concerns in certain regions.

For example, studies by Smith et al. (2019) showed that benzophenone-based UV absorbers lost up to 30% of their mass during thermal curing cycles, significantly lowering their protective efficacy over time. Another study by Zhang & Li (2020) found that in waterborne acrylic systems, some UVAs caused hazing and reduced transparency due to phase separation.

This is where UV-1130 starts to look like a breath of fresh air — or rather, a breath of clean coating chemistry.

💡 Advantages of UV-1130 in High-Solid and Low-VOC Systems

Here’s what makes UV-1130 stand out in today’s formulation landscape:

✅ High Efficiency in UV Absorption

UV-1130 absorbs strongly in the 300–380 nm range, which is precisely where most UV damage occurs. This means it starts working before visible degradation sets in.

✅ Excellent Thermal Stability

With a melting point around 150°C and minimal sublimation, UV-1130 remains active even after baking cycles or outdoor exposure.

✅ Good Compatibility with Resin Systems

It blends well with common resin types including polyesters, polyurethanes, epoxies, and acrylics. This compatibility reduces issues like blooming or migration.

✅ Low Volatility

Its high molecular weight and low vapor pressure make it ideal for high-solids systems where solvent levels are kept to a minimum.

✅ Environmentally Friendly Profile

UV-1130 has been evaluated in multiple toxicological studies and is generally considered safe for use in consumer and industrial applications. It complies with REACH and other major regulations.

✅ Synergistic Effects with HALS

Hydroxyamine light stabilizers (HALS) work best when paired with UV absorbers. UV-1130 complements HALS by handling initial UV absorption while HALS mop up free radicals later in the degradation process.

🛠️ Practical Formulation Tips Using UV-1130

Now that we’ve covered the theory, let’s roll up our sleeves and get into the nitty-gritty of actual formulation. Whether you’re working on automotive coatings, industrial finishes, or architectural paints, here are some tried-and-true tips for incorporating UV-1130 effectively.

Dosage Recommendations

The typical recommended dosage for UV-1130 is 0.2–1.5% by weight, depending on the system and desired protection level. For example:

Application Type	Recommended UV-1130 Level
Automotive Clearcoat	0.8–1.2%
Industrial Powder Coating	0.5–1.0%
Wood Lacquer	0.5–0.8%
Waterborne Exterior Paint	0.3–0.6%

Note: Higher loadings do not always mean better performance. Overloading can lead to phase separation or haze.

Mixing Sequence

To ensure uniform dispersion:

Pre-disperse UV-1130 in a small amount of resin or co-solvent.
Add to the millbase during pigment grinding.
Alternatively, add during letdown stage if using pre-dispersed paste.

Use with Other Stabilizers

As mentioned earlier, UV-1130 pairs well with HALS. A typical synergistic combination might include:

UV-1130: 0.5%
Tinuvin 770 (a HALS): 0.3%

This combo offers both primary UV absorption and secondary radical scavenging, providing comprehensive protection.

📊 Performance Comparison with Other UV Absorbers

To give you a clearer picture of how UV-1130 stacks up against other popular UV absorbers, here’s a side-by-side comparison based on various performance metrics:

Parameter	UV-1130	Benzophenone-1 (BP-1)	Tinuvin 328	Chimassorb 81
UV Absorption Range (nm)	300–380	280–340	300–360	300–380
Volatility (at 150°C)	Very Low	Moderate	Moderate	Low
Migration Resistance	High	Low	Moderate	High
Compatibility with Resins	Excellent	Moderate	Good	Good
Toxicity Profile	Safe	Questionable	Safe	Safe
Cost (relative)	Medium-High	Low	Medium	High
Regulatory Status (REACH)	Compliant	Restricted in EU	Compliant	Compliant

Data adapted from industry reports and peer-reviewed studies (Chen et al., 2021; Wang & Zhou, 2022).

From this table, it’s clear that while BP-1 might be cheaper, it doesn’t hold up well in terms of safety and performance. Tinuvin 328 is a decent middle ground, but lacks the thermal stability of UV-1130. Chimassorb 81 is comparable but significantly more expensive.

🔬 Real-World Testing Results

To back up these claims, let’s take a look at some accelerated weathering tests conducted on a polyurethane topcoat formulated with and without UV-1130.

Test Conditions:

Xenon arc lamp aging (ASTM G155 cycle B)
1000 hours total exposure
Measured changes in gloss and color

Sample Description	Initial Gloss (60°)	Final Gloss (60°)	ΔE (Color Change)
Control (no UV stabilizer)	90	35	6.2
With 0.5% UV-1130	90	78	1.1
With 0.5% UV-1130 + 0.3% HALS	90	82	0.7

These results show that UV-1130 significantly improves gloss retention and color stability. The addition of HALS further enhances the effect, proving the value of a multi-layered stabilization approach.

Another field test was conducted on wooden decks coated with an acrylic lacquer containing UV-1130. After 18 months of outdoor exposure in southern China (high UV index region), the treated samples showed minimal chalking and retained 85% of their original gloss, compared to 40% for the control.

🏭 Industrial Applications and Case Studies

Let’s take a closer look at how UV-1130 is being applied across different industries.

1. Automotive Coatings

In the automotive sector, UV-1130 is often incorporated into clearcoats to prevent yellowing and maintain gloss. A major OEM in Germany reported a 30% improvement in UV resistance when switching from a standard benzotriazole UV absorber to UV-1130 in their high-solids 2K polyurethane system.

2. Powder Coatings

Due to its high thermal stability, UV-1130 is ideal for powder coatings that undergo curing at elevated temperatures (180–200°C). A Chinese manufacturer of aluminum extrusion coatings found that adding 0.8% UV-1130 extended the outdoor durability of their polyester-based powders from 5 to 8 years.

3. Waterborne Architectural Paints

In waterborne systems, UV-1130 is typically supplied as a pre-dispersed paste to avoid solubility issues. A U.S.-based paint company achieved a 40% reduction in VOC content while maintaining UV protection by replacing a solvent-based UV absorber with UV-1130 in a zero-VOC interior/exterior latex paint.

🌍 Environmental and Safety Considerations

As regulations tighten around the globe, formulators must pay close attention to the environmental footprint of their ingredients. UV-1130 checks out pretty well in this department.

Biodegradability: Moderately biodegradable under aerobic conditions.
Aquatic Toxicity: Low toxicity to fish and algae (LC50 > 10 mg/L).
Regulatory Compliance:
- REACH registered
- Listed in EINECS
- No SVHC (Substances of Very High Concern) classification
- Compliant with California Proposition 65

However, like any chemical, it should be handled with care. Proper PPE and ventilation are recommended during handling. Long-term inhalation of dust should be avoided.

🧰 Handling and Storage Tips

To keep UV-1130 performing at its best, follow these simple guidelines:

Store in a cool, dry place away from direct sunlight.
Keep containers tightly sealed to prevent moisture absorption.
Avoid prolonged skin contact; wear gloves when handling.
In case of spills, sweep up and dispose of according to local regulations.

🔄 Future Outlook and Trends

As the push for sustainable, low-emission products continues, UV-1130 is poised to become even more important in the formulation toolbox. With increasing demand for:

Low-VOC and zero-VOC coatings
High-performance, long-lasting finishes
Waterborne and powder coating technologies

UV-1130 offers a reliable, effective solution that aligns with both technical and environmental goals.

Moreover, ongoing research is exploring ways to enhance UV-1130’s performance through nanodispersion techniques and hybrid stabilization systems. Early results suggest that nano-encapsulated UV-1130 could offer even better distribution and longer protection times — something to watch out for in the coming years.

🧾 Summary Table: UV-1130 at a Glance

Feature	Detail
Type	Hydroxyphenyl benzotriazole UV absorber
Key Benefits	High UV absorption, low volatility, good compatibility
Typical Dosage	0.2–1.5%
Suitable Systems	High-solids, low-VOC, waterborne, powder coatings
Best Used With	HALS (e.g., Tinuvin 770)
Regulatory Status	REACH compliant, non-restricted substance
Cost Range	Moderate-High
Shelf Life	2+ years in proper storage
Application Examples	Automotive clearcoats, wood finishes, industrial paints

🎯 Final Thoughts

Formulating high-solid, low-VOC systems isn’t just about checking boxes on a compliance sheet — it’s about delivering real value to customers who expect durability, aesthetics, and sustainability in equal measure. UV-1130 stands out as a versatile, efficient, and environmentally friendly additive that meets all three criteria.

Whether you’re developing the next generation of eco-friendly automotive coatings or crafting a premium wood finish that lasts for decades, UV-1130 deserves a spot on your ingredient list. It’s not just another UV absorber — it’s a smart choice for a cleaner, brighter future in coatings technology.

So the next time you’re staring at a formulation spreadsheet wondering how to balance performance and green credentials, remember: UV-1130 might just be the missing piece of the puzzle. 🧩✨

🔗 References

Smith, J., Doe, R., & Lee, K. (2019). Volatility and Efficacy of UV Absorbers in High-Temperature Curing Processes. Journal of Coatings Technology, 91(3), 45–58.
Zhang, Y., & Li, H. (2020). Compatibility Challenges in Waterborne UV-Absorbing Coatings. Progress in Organic Coatings, 145, 105678.
Chen, M., Wang, L., & Zhao, Q. (2021). Comparative Study of UV Stabilizers in Polyurethane Coatings. Polymer Degradation and Stability, 189, 109574.
Wang, X., & Zhou, F. (2022). Thermal Stability and Migration Behavior of Benzotriazole UV Absorbers. Industrial & Engineering Chemistry Research, 61(12), 4321–4330.
European Chemicals Agency (ECHA). (2023). REACH Registration Dossier for UV-1130. ECHA Database.
ASTM International. (2019). Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Non-Metallic Materials (ASTM G155). West Conshohocken, PA.

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UV Absorber UV-1130 for high-performance wood coatings and varnishes

UV Absorber UV-1130: The Invisible Guardian of High-Performance Wood Coatings and Varnishes

Introduction

In the world of wood coatings and varnishes, beauty is more than skin deep — it’s also about durability. A glossy finish might catch your eye today, but will it still shine a year from now? Will it resist fading under relentless sunlight or cracking due to weather exposure? This is where UV absorbers, particularly UV-1130, come into play as unsung heroes in the formulation of high-performance wood finishes.

UV-1130 is not just another chemical name buried in a technical data sheet; it’s a game-changer in the battle against ultraviolet radiation. Whether you’re sealing a dining table or protecting an outdoor deck, UV-1130 helps preserve both the aesthetic appeal and structural integrity of wood by absorbing harmful UV rays before they can wreak havoc.

This article delves into the science behind UV-1130, its applications in wood coatings, performance benefits, compatibility with other additives, environmental considerations, and future prospects. Along the way, we’ll sprinkle in some industry insights, practical tips, and even a few metaphors to keep things lively. After all, chemistry doesn’t have to be dry — especially when we’re talking about something that keeps your furniture looking fresh under the sun.

What Is UV-1130?

UV-1130 belongs to the family of benzotriazole-based UV absorbers, which are widely used across various industries for their ability to protect materials from UV degradation. Its full chemical name is 2-(2′-Hydroxy-5′-methylphenyl)benzotriazole, and it’s often abbreviated as Tinuvin 1130 in commercial contexts.

This compound works by selectively absorbing UV light in the range of 300–385 nm, converting it into harmless heat energy. In doing so, it prevents the UV radiation from initiating photodegradation processes such as oxidation, discoloration, and embrittlement — common enemies of long-lasting wood finishes.

Let’s take a closer look at its key properties:

Property	Description
Chemical Class	Benzotriazole
CAS Number	2440-22-8
Molecular Weight	~229.3 g/mol
Appearance	Light yellow to white powder or solid
Solubility (in typical solvents)	Insoluble in water; soluble in most organic solvents
Recommended Dosage	0.2% – 1.5% by weight of total formulation
Thermal Stability	Up to 200°C without significant decomposition
Light Fastness	Excellent
Compatibility	Good with most resins, including polyurethanes, alkyds, and acrylics

Why UV Protection Matters in Wood Coatings

Wood is a living material — even after being harvested and transformed into furniture, flooring, or cabinetry. It retains a certain sensitivity to environmental factors, especially sunlight. Prolonged UV exposure causes several undesirable changes:

Color Fading: Natural pigments in wood break down, leading to bleaching or uneven color tones.
Surface Cracking: UV radiation weakens the lignin structure, causing micro-cracks on the surface.
Loss of Gloss: The resin matrix in coatings degrades, dulling the finish.
Reduced Adhesion: Degraded surfaces lose bond strength, increasing the risk of peeling or flaking.

Without proper protection, even the highest-quality wood coatings can degrade within months of installation. That’s where UV-1130 steps in like a sunscreen for wood, intercepting UV photons before they reach the vulnerable components below.

Think of UV-1130 as a bouncer at a nightclub — it blocks the troublemakers (UV photons) at the door before they can cause chaos inside. And unlike some other UV absorbers, UV-1130 is known for its high efficiency, low volatility, and excellent compatibility with modern coating systems.

Performance Benefits of UV-1130 in Wood Coatings

The inclusion of UV-1130 in wood coatings brings a host of tangible benefits. Here’s a breakdown of what makes it stand out from other UV stabilizers:

✅ Enhanced Color Retention

One of the first signs of UV damage is fading. Whether it’s a rich mahogany cabinet or a pale oak floor, UV radiation strips away the vibrancy. Studies show that coatings containing UV-1130 retain up to 85% of their original color intensity after 12 months of outdoor exposure, compared to only 40–50% for unprotected coatings (Wang et al., 2018).

✅ Improved Surface Durability

By reducing photooxidation, UV-1130 helps maintain the mechanical properties of the coating. Surfaces stay smoother, harder, and less prone to chalking or cracking.

✅ Longer Service Life

A well-formulated coating with UV-1130 can extend the maintenance cycle of wood structures by 2–5 years, depending on environmental conditions. For industrial or architectural applications, this translates into significant cost savings.

✅ Compatibility with Clear and Pigmented Systems

Whether you’re applying a clear lacquer or a tinted stain, UV-1130 integrates seamlessly. Unlike some UV absorbers that may alter the hue or clarity of transparent finishes, UV-1130 has minimal impact on visual appearance.

✅ Resistance to Migration and Volatilization

Migration refers to the movement of additives within the coating film over time. Some UV absorbers tend to leach out or migrate to the surface, reducing their effectiveness. UV-1130, however, remains well-distributed and stable, thanks to its relatively high molecular weight and strong interaction with resin matrices.

Application in Different Types of Wood Coatings

UV-1130 isn’t a one-size-fits-all solution — it adapts to various coating technologies. Let’s explore how it performs in different systems:

Coating Type	Compatibility	Recommended Use Level	Notes
Polyurethane	Excellent	0.5% – 1.2%	Enhances exterior durability
Alkyd Resins	Good	0.3% – 1.0%	Improves gloss retention
Acrylics	Very Good	0.5% – 1.5%	Works well in waterborne systems
Nitrocellulose Lacquers	Moderate	0.2% – 0.8%	May require co-stabilizers
Epoxy Systems	Fair	0.5% – 1.0%	Best in combination with HALS

As shown above, UV-1130 plays well with most resin systems. However, for optimal performance, it’s often recommended to use it in conjunction with hindered amine light stabilizers (HALS). Think of them as a dynamic duo — UV-1130 absorbs UV light, while HALS mop up free radicals generated during degradation, offering a two-pronged defense system.

Environmental and Safety Considerations

In today’s eco-conscious market, the environmental footprint of additives matters more than ever. So, how green is UV-1130?

Toxicity and Health Impact

According to the European Chemicals Agency (ECHA), UV-1130 is classified as non-toxic under standard handling conditions. It does not pose significant risks to human health when used as intended in coatings. However, prolonged inhalation of dust or contact with eyes should be avoided, as with any fine particulate additive.

Biodegradability and Ecotoxicity

UV-1130 is considered moderately biodegradable, though not rapidly so. Its ecotoxicological profile shows low acute toxicity to aquatic organisms (OECD 207, 2016). Still, best practices recommend avoiding direct release into water bodies.

Regulatory Status

REACH (EU): Registered under REACH regulation with no restrictions.
EPA (USA): Listed under TSCA inventory.
China: Approved for industrial use under national standards.

For formulators aiming for green certifications (e.g., GREENGUARD, LEED), UV-1130 can be part of compliant formulations, especially when combined with low-VOC resins and solvents.

Real-World Applications and Case Studies

Let’s take a peek at how UV-1130 performs outside the lab.

📌 Case Study 1: Outdoor Decking in Arizona

An independent study conducted by the University of Arizona evaluated the performance of UV-1130 in a polyurethane-based topcoat applied to Ipe hardwood decks. After 18 months of continuous sun exposure, the treated samples showed minimal color change (ΔE < 2.0) and no visible cracking or chalking, whereas untreated samples exhibited severe degradation.

📌 Case Study 2: Interior Furniture in a Coastal Climate

A furniture manufacturer in Florida reported a 40% reduction in customer complaints related to yellowing and gloss loss after switching to a UV-1130-enhanced clear coat. The product was tested under ASTM D4445 (accelerated weathering), showing consistent performance over 1,000 hours.

📌 Case Study 3: Industrial Flooring in Germany

A large automotive plant in Stuttgart used UV-1130-modified epoxy flooring in its production area. Despite constant exposure to overhead lighting and occasional UV emissions from welding equipment, the floor maintained its integrity and appearance for over five years — far exceeding the expected lifespan of standard formulations.

These examples illustrate that whether indoors or outdoors, residential or industrial, UV-1130 consistently delivers reliable protection.

Formulation Tips and Best Practices

Getting the most out of UV-1130 requires more than just throwing it into the mix. Here are some professional-grade tips for effective use:

🔬 Proper Dispersion

Because UV-1130 is typically supplied as a powder, ensure thorough dispersion using high-speed mixing or pre-dispersing in a solvent or plasticizer. Poor dispersion can lead to localized UV hotspots and inconsistent protection.

🧪 Synergy with HALS

As previously mentioned, combining UV-1130 with HALS compounds significantly enhances performance. A typical ratio is 1:1 UV-1130 to HALS, though this can vary based on exposure conditions.

🧂 Avoid Overloading

While more might seem better, excessive UV-1130 can lead to:

Increased viscosity
Yellowing in clear coats
Reduced transparency

Stick to recommended dosage levels unless advised otherwise by a technical expert.

💡 Storage and Handling

Store UV-1130 in a cool, dry place away from direct sunlight. Keep containers tightly sealed to prevent moisture absorption. Always wear appropriate PPE (gloves, goggles) during handling.

Challenges and Limitations

Despite its many virtues, UV-1130 isn’t without limitations. Here are a few potential issues formulators should be aware of:

Challenge	Description
Limited UV Coverage	Primarily effective in the 300–385 nm range; may need additional stabilizers for broader protection
Not Suitable for All Solvent Systems	May precipitate in non-polar solvents if not properly dispersed
Cost Factor	Slightly more expensive than older UV absorbers like UV-9 or UV-531
Regulatory Variability	Local regulations may restrict usage in food-contact or medical-grade coatings

Understanding these constraints allows for smarter formulation decisions and avoids unpleasant surprises later.

Comparative Analysis with Other UV Absorbers

To put UV-1130 in context, let’s compare it with some commonly used alternatives:

UV Stabilizer	UV Range (nm)	Volatility	Migration	Cost	Best Use Case
UV-9	300–340	High	High	Low	Short-term indoor applications
UV-531	300–370	Medium	Medium	Medium	General-purpose coatings
UV-327	300–380	Low	Low	High	High-performance industrial coatings
UV-1130	300–385	Low	Low	Medium-High	Premium wood and exterior coatings
Uvinul 4049 HD	300–380	Low	Very Low	High	Automotive and aerospace coatings

From this comparison, UV-1130 emerges as a balanced performer — offering broad UV coverage, low volatility, and good cost-efficiency, especially for wood coatings where aesthetics and longevity go hand-in-hand.

Future Trends and Innovations

As sustainability becomes central to coating development, the role of UV absorbers like UV-1130 is evolving. Here are a few trends shaping the future:

🎯 Nano-Encapsulation Technologies

Researchers are exploring ways to encapsulate UV-1130 in nano-sized carriers to improve dispersion, reduce loading, and enhance performance. Early studies suggest that nano-UV-1130 could offer up to 30% higher UV efficiency while maintaining clarity in transparent coatings (Zhang et al., 2021).

🔄 Bio-Based UV Absorbers

Although synthetic UV absorbers like UV-1130 dominate the market, there’s growing interest in bio-derived alternatives. While current natural UV blockers (like flavonoids or tannins) lack the robustness of benzotriazoles, hybrid systems incorporating UV-1130 with plant extracts may pave the way for greener solutions.

🧠 Smart UV Protection Systems

Emerging “smart” coatings are designed to respond to UV intensity, releasing UV absorbers only when needed. Though still in early stages, integrating UV-1130 into such systems could revolutionize how we manage UV protection dynamically.

Conclusion

In the grand theater of wood coatings, UV-1130 may not always steal the spotlight, but it sure knows how to hold the stage. By efficiently filtering out harmful UV radiation, it ensures that wood finishes remain vibrant, durable, and resilient — whether they’re sheltered in a cozy living room or braving the elements on a sun-soaked patio.

Its versatility across coating types, compatibility with other stabilizers, and favorable safety profile make it a preferred choice among formulators worldwide. As technology advances and sustainability gains momentum, UV-1130 continues to adapt, proving that even the oldest tools can find new tricks in a changing world.

So next time you admire the gleam of a well-sealed wooden table, remember — there’s more to that shine than meets the eye. Behind the scenes, UV-1130 is quietly doing its job, ensuring that beauty lasts longer than just a season.

References

Wang, Y., Li, H., & Zhang, J. (2018). Effect of UV Absorbers on the Weathering Resistance of Wood Coatings. Journal of Coatings Technology and Research, 15(3), 457–465.
OECD (2016). Guidelines for the Testing of Chemicals: Test No. 207 – Terrestrial Plant Test: Seedling Emergence and Seedling Growth Test. OECD Publishing.
ECHA (European Chemicals Agency). (2023). Substance Registration and Evaluation under REACH Regulation.
EPA (United States Environmental Protection Agency). (2022). TSCA Inventory Data Release.
Zhang, L., Chen, M., & Liu, X. (2021). Nano-Encapsulation of UV Absorbers for Enhanced Photostability in Clear Coatings. Progress in Organic Coatings, 159, 106342.
SAE International. (2020). Automotive Coatings and Materials: Advances in UV Protection Technologies.
GB/T 9756-2018. Chinese National Standard for Synthetic Resin Emulsion Wall Coatings.
ASTM D4445-18. Standard Practice for Exposure of Coatings to Accelerated Weathering Using Xenon-Arc Apparatus.

If you’re a coatings formulator, a DIY enthusiast, or simply curious about what goes into making your furniture last, UV-1130 deserves a place in your toolkit. After all, the best protection is the kind you don’t see — until you realize how much it’s been doing all along. 😊

Sales Contact：[email protected]

Application of UV Absorber UV-1130 in plastic components exposed to sunlight

Application of UV Absorber UV-1130 in Plastic Components Exposed to Sunlight

When it comes to plastics and the sun, let’s just say they’re not exactly best friends. 🌞💔 Left unprotected, plastic components exposed to sunlight tend to degrade over time — a slow but sure death marked by discoloration, brittleness, and loss of mechanical strength. This is where UV absorbers come into play, and among them, UV-1130 has earned a reputation as one of the more effective and versatile options for protecting polymers from the sun’s harmful ultraviolet rays.

In this article, we’ll take a deep dive into what makes UV-1130 such a popular choice for formulators and manufacturers dealing with outdoor plastic applications. We’ll explore its chemical properties, how it works at a molecular level, its compatibility with different polymer systems, real-world applications, and even compare it with other commonly used UV stabilizers. Along the way, we’ll sprinkle in some practical advice and lessons learned from industry practices and scientific literature.

What Exactly Is UV-1130?

Let’s start with the basics. UV-1130, chemically known as 2-(2H-Benzotriazol-2-yl)-4-(tert-octylphenyl) phenol, is a member of the benzotriazole family of UV absorbers. These compounds are widely used in plastics, coatings, and textiles due to their excellent ability to absorb UV light in the 300–380 nm range — the part of the spectrum most damaging to organic materials.

Property	Value
Chemical Name	2-(2H-Benzotriazol-2-yl)-4-(tert-octylphenyl) phenol
CAS Number	1843-05-6
Molecular Formula	C₂₆H₂₇N₃O
Molecular Weight	~397.5 g/mol
Appearance	Pale yellow solid or powder
Solubility (in water)	Practically insoluble
Melting Point	~145°C
UV Absorption Range	300–380 nm

It’s worth noting that UV-1130 isn’t just a random compound thrown into plastics for good measure. Its design is quite intentional — the bulky tert-octyl group enhances thermal stability and reduces volatility, making it suitable for high-temperature processing like injection molding or extrusion. In simpler terms, it can take the heat without disappearing into thin air during manufacturing.

How Does It Work? The Science Behind the Shield

To understand how UV-1130 protects plastics, you need to grasp why UV radiation is so destructive in the first place. When UV photons hit polymer chains, they can break chemical bonds, leading to free radical formation. These radicals then trigger a cascade of oxidation reactions, ultimately resulting in degradation — think fading color, cracking, and weakening of the material.

Enter UV-1130. It acts like a sponge for UV light: it absorbs the harmful energy and dissipates it safely as heat instead of letting it wreak havoc on polymer chains. Because it doesn’t react chemically with the polymer itself under normal conditions, it remains relatively stable and long-lasting within the material matrix.

This mechanism is known as UV absorption, and while it’s not the only method of photostabilization (there are also hindered amine light stabilizers, or HALS, which work differently), it’s a critical part of a comprehensive protection strategy.

One thing that sets UV-1130 apart from some other UV absorbers is its low volatility and good compatibility with a wide range of resins, including polyolefins, polycarbonate, acrylics, and polyurethanes. That means it stays put once incorporated and doesn’t migrate out easily — a big plus for long-term durability.

Compatibility and Performance in Different Polymers

Let’s talk about how UV-1130 performs across various types of plastics. Not all polymers are created equal when it comes to UV sensitivity, and neither are their interactions with additives.

Polymer Type	UV Sensitivity	UV-1130 Effectiveness	Notes
Polyethylene (PE)	High	Excellent	Commonly used in agricultural films and geomembranes
Polypropylene (PP)	Moderate	Good	Often used in automotive interiors and packaging
Polycarbonate (PC)	High	Very Good	Used in glazing, lenses, and electronic housings
Polyvinyl Chloride (PVC)	Moderate	Fair	Requires co-stabilizers for best results
Polyurethane (PU)	Moderate to High	Good	Used in coatings, foams, and elastomers
Acrylic (PMMA)	Low to Moderate	Excellent	Common in signage and optical applications

For example, polyethylene — especially low-density polyethylene (LDPE) — is notoriously prone to UV degradation. Without stabilization, LDPE can become brittle and chalky after just a few months outdoors. But studies have shown that adding UV-1130 at concentrations between 0.2% and 0.5% significantly extends its service life, often doubling or tripling outdoor durability.

Similarly, polycarbonate — a clear, impact-resistant material used in everything from greenhouses to eyewear — can turn yellow and crack under prolonged UV exposure. UV-1130 helps maintain clarity and structural integrity, which is essential in applications where aesthetics and performance go hand-in-hand.

Now, here’s an interesting twist: while UV-1130 does a great job on its own, it often works better in combination with other additives like HALS or antioxidants. Think of it as teamwork — each additive handles a different part of the degradation puzzle. For instance, while UV-1130 soaks up UV light, HALS neutralizes the free radicals that slip through the cracks.

Real-World Applications: Where You’ll Find UV-1130 in Action

You might not see UV-1130, but you’ve definitely seen things made with it. Let’s look at some key industries where this UV absorber plays a crucial role:

1. Automotive Industry 🚗

From dashboard components to exterior trim and headlights, cars are full of plastic parts that sit in the sun day after day. UV-1130 is often included in these components to prevent fading, cracking, and overall degradation. Especially in regions with intense sunlight, such as the Middle East or Australia, using UV-1130 becomes not just a nice-to-have, but a necessity.

2. Construction and Infrastructure 🏗️

Plastic pipes, window profiles, and roofing membranes all benefit from UV protection. PVC window frames, for instance, would fade and warp without proper stabilization. UV-1130, along with thermal stabilizers, helps maintain both appearance and functionality over decades of use.

3. Agriculture and Horticulture 🌱

Greenhouse films, mulch films, and irrigation tubes are constantly exposed to the sun. UV-1130 helps extend the life of these products, reducing replacement frequency and environmental waste. Some studies have shown that greenhouse films containing UV-1130 can last up to 5 years outdoors, compared to just 1 year without any UV protection.

4. Consumer Goods and Electronics 📱

Think about your garden furniture, children’s toys, or even the housing of your outdoor security camera. These items may look fine today, but without UV protection, they’d be cracked and faded tomorrow. UV-1130 helps keep consumer products looking fresh and functional longer.

5. Marine and Outdoor Equipment 🛥️

Boat covers, buoys, ropes, and deck fittings all face extreme weather conditions. UV-1130 ensures that these components don’t degrade prematurely, which is especially important in saltwater environments where mechanical failure can be costly or dangerous.

Dosage and Processing Considerations

So, how much UV-1130 should you actually use? Like many additives, the answer depends on the application, resin type, and expected service life.

Application Type	Recommended Dosage (%)	Notes
General outdoor use	0.2 – 0.5	Standard dosage for most thermoplastics
Agricultural films	0.3 – 0.6	Higher loading for extended life
Automotive components	0.3 – 0.5	Often combined with HALS and antioxidants
Injection-molded parts	0.2 – 0.4	Depends on wall thickness and exposure
Coatings and adhesives	0.5 – 1.0	Higher dosage needed due to thinner layers

Dosage is usually expressed as a percentage of the total formulation weight. In general, 0.2% to 0.5% is sufficient for most thermoplastic applications. However, for films or thin-walled parts that are expected to last several years outdoors, higher dosages (up to 0.6%) may be necessary.

Processing-wise, UV-1130 is compatible with standard plastic processing techniques such as extrusion, injection molding, blow molding, and calendering. Its melting point (~145°C) makes it suitable for high-temperature processes, and because it’s not highly volatile, it doesn’t evaporate easily during processing.

However, one thing to watch out for is uneven dispersion. If the additive isn’t well dispersed in the polymer matrix, it won’t do its job effectively. Using masterbatches or pre-dispersed forms can help avoid this issue.

Comparative Analysis: UV-1130 vs Other UV Stabilizers

While UV-1130 is a strong contender, it’s not the only player in the game. Let’s briefly compare it with some other common UV absorbers and stabilizers:

Additive	Type	UV Range	Advantages	Disadvantages
UV-1130	Benzotriazole	300–380 nm	Excellent UV absorption, good thermal stability, low volatility	Slightly higher cost than some alternatives
UV-327	Benzotriazole	300–375 nm	Good UV absorption, moderate cost	More volatile than UV-1130
UV-531	Benzophenone	280–340 nm	Cost-effective, broad compatibility	Less efficient at higher wavelengths
Tinuvin 328	Benzotriazole	300–380 nm	Similar performance to UV-1130	Patented by BASF, often more expensive
Chimassorb 944	HALS	N/A (radical scavenger)	Excellent long-term protection	Doesn’t absorb UV directly
Irganox 1010	Antioxidant	N/A	Protects against oxidative degradation	Works synergistically with UV absorbers

As you can see, UV-1130 holds its own quite well. Compared to UV-327 and UV-531, it offers better thermal stability and broader UV coverage. Compared to proprietary products like Tinuvin 328, it’s often more affordable while maintaining similar performance.

Also, remember that HALS like Chimassorb 944 aren’t direct replacements for UV absorbers — they work in tandem. While UV-1130 stops UV before it starts causing damage, HALS mop up the free radicals that form afterward. So the best formulations often combine both.

Environmental and Safety Considerations 🌍

No discussion of additives would be complete without touching on safety and environmental impact. UV-1130 is generally considered safe for industrial use and is not classified as carcinogenic, mutagenic, or toxic to reproduction according to current EU regulations (REACH).

That said, like many organic chemicals, it should be handled with care. Dust inhalation should be avoided, and protective equipment such as gloves and masks are recommended during handling. Also, it’s not biodegradable, so disposal needs to follow local hazardous waste guidelines.

Some recent studies have raised concerns about the potential leaching of UV stabilizers into the environment, particularly in aquatic ecosystems. While UV-1130 hasn’t been flagged as a major pollutant, ongoing research continues to assess its long-term ecological impact.

Case Study: UV-1130 in Agricultural Films

Let’s zoom in on one specific application to see how UV-1130 really shines — agriculture.

Agricultural polyethylene films are often used for greenhouse covers, mulching, and silage wrapping. These films are subjected to intense UV radiation, especially in tropical and subtropical climates. Without UV protection, these films can fail within months, leading to crop losses and increased costs for farmers.

A study conducted by researchers at the University of São Paulo (Brazil) tested the performance of UV-1130 in low-density polyethylene (LDPE) films exposed to natural sunlight for 18 months. The films were prepared with varying concentrations of UV-1130 (0%, 0.3%, and 0.5%). The results were telling:

Film Type	Tensile Strength Retention (%)	Visual Degradation Index
No UV Protection	32%	Heavily cracked and discolored
0.3% UV-1130	78%	Slight yellowing
0.5% UV-1130	85%	Minimal change

The addition of UV-1130 clearly improved the film’s durability, with the 0.5% concentration offering the best protection. Farmers reported being able to reuse the films for multiple growing seasons, which not only cut costs but also reduced plastic waste.

This kind of real-world data reinforces the value of UV-1130 in practical applications where longevity and reliability are paramount.

Future Outlook and Emerging Trends

As global demand for durable, lightweight materials continues to rise, so too does the need for effective UV protection. With climate change increasing UV intensity in many regions, the importance of additives like UV-1130 will only grow.

One emerging trend is the development of hybrid UV protectants — combinations of UV absorbers, HALS, and antioxidants designed to offer multi-layered defense. Another area of interest is nano-coatings, where UV-1130 is embedded in surface layers rather than mixed throughout the bulk material, potentially reducing the required dosage.

Additionally, there’s growing interest in bio-based UV absorbers, though they’re still in early stages and haven’t yet matched the performance of traditional compounds like UV-1130.

Final Thoughts

All in all, UV-1130 stands out as a reliable, effective, and versatile UV absorber for a wide range of plastic applications. Whether it’s keeping your car’s dashboard from cracking, protecting greenhouse crops, or ensuring that playground equipment doesn’t turn into a chalky mess, UV-1130 quietly does its job behind the scenes.

Like a sunscreen for plastics, it shields materials from the invisible enemy — UV radiation — without compromising aesthetics or performance. And while it’s not a magic bullet on its own, when used wisely and in combination with other stabilizers, it can dramatically extend the lifespan of plastic components exposed to the elements.

So next time you’re enjoying the sunshine, spare a thought for the little molecules working overtime inside your plastic chair, your garden hose, or your smartphone case — they might just owe their survival to UV-1130. ☀️🛡️

References

Marchetti, F., et al. (2015). "Photostability of polymeric materials: A review." Polymer Degradation and Stability, 115, 1–12.
Costa, L. M., & Picanço, M. C. (2018). "Performance evaluation of UV stabilizers in agricultural polyethylene films." Journal of Applied Polymer Science, 135(18), 46123.
Wang, Y., et al. (2020). "Synergistic effects of UV absorbers and HALS in polypropylene: A comparative study." Polymer Testing, 84, 106375.
European Chemicals Agency (ECHA). (2021). "Benzotriazoles: Toxicological and Ecotoxicological Assessment."
Smith, J. R., & Patel, A. K. (2019). "Thermal and UV stability of benzotriazole derivatives in thermoplastic polyurethane." Journal of Vinyl and Additive Technology, 25(S1), E145–E152.
BASF Technical Bulletin. (2017). "Tinuvin 328: Product Information and Application Guide."
Liang, X., et al. (2022). "Environmental fate and risk assessment of UV stabilizers in marine ecosystems." Environmental Pollution, 289, 117823.
ISO Standard 4892-3:2013. "Plastics—Methods of exposure to laboratory light sources—Part 3: Fluorescent UV lamps."
ASTM D4329-13. "Standard Practice for Fluorescent Ultraviolet Lamp Apparatus Exposure of Plastics."
Zhang, W., & Liu, H. (2021). "Advances in UV protection technologies for sustainable plastics." Progress in Polymer Science, 112, 101436.

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UV Absorber UV-1130 for architectural coatings with extended service life

UV Absorber UV-1130 for Architectural Coatings: A Shield Against Time and Sunlight

When we talk about architectural coatings, we’re not just talking about a splash of color on a building’s façade. We’re talking about protection, durability, aesthetics, and yes—even a bit of pride in the way our structures stand tall against the elements. Among the many ingredients that make up a high-performance coating, one unsung hero often goes unnoticed by the general public but is revered among formulators and material scientists alike: UV absorbers, and specifically, UV-1130.

Let’s dive into the world of this fascinating compound—what it does, why it matters, how it performs, and why it might just be the secret sauce your next architectural paint or coating needs to go from "just okay" to "built to last."

What Is UV-1130?

UV-1130, also known as 2-(2H-Benzotriazol-2-yl)-4-methylphenol, is a member of the benzotriazole family of UV absorbers. It’s commonly used in various polymer systems—including paints, coatings, plastics, and even some adhesives—to protect materials from the damaging effects of ultraviolet radiation.

Think of UV-1130 as a sunscreen for your building. Just like you slather on SPF 50 before heading out into the sun, UV-1130 helps coatings resist fading, chalking, yellowing, and other forms of degradation caused by prolonged UV exposure.

But UV-1130 isn’t just any old sunscreen—it’s more like the all-natural, reef-safe, sweat-proof kind that actually works after six hours at the beach.

Why UV Protection Matters in Architectural Coatings

Before we get too deep into UV-1130 itself, let’s take a moment to understand why UV protection is so crucial in architectural coatings.

Sunlight may look pretty shining off the windows of a skyscraper, but behind that golden glow lies a relentless force of nature: ultraviolet radiation. UV rays are responsible for breaking down chemical bonds in polymers and pigments, leading to:

Fading of color
Chalking (powdery surface)
Cracking and flaking
Loss of gloss
Reduced mechanical strength

In simple terms, without proper UV protection, your beautiful new coat of paint could start looking tired and worn within a couple of years—even if it was top-of-the-line when applied.

Architects, engineers, and contractors want their work to endure—not just structurally, but aesthetically. That’s where UV absorbers like UV-1130 come in handy.

The Chemistry Behind UV-1130

Let’s break it down a bit. UV-1130 belongs to the benzotriazole class, which is widely regarded as one of the most effective types of UV stabilizers. Its molecular structure allows it to absorb UV light in the range of 300–380 nm, converting harmful photons into harmless heat energy.

Here’s a quick look at its key structural features:

Feature	Description
Chemical Class	Benzotriazole UV absorber
Molecular Formula	C₁₄H₁₃N₃O
Molecular Weight	~223.27 g/mol
Appearance	White to slightly yellow powder
Solubility in Water	Very low
Boiling Point	>300°C
Melting Point	135–140°C

This unique combination of properties makes UV-1130 ideal for use in solvent-based and waterborne coatings alike. Plus, its relatively high melting point means it doesn’t volatilize easily during application or curing, ensuring long-term performance.

Performance Characteristics of UV-1130

So what sets UV-1130 apart from other UV absorbers? Let’s compare it with a few common alternatives:

Property	UV-1130	UV-9	Tinuvin 326	Chimassorb 81
UV Absorption Range	300–380 nm	300–360 nm	300–370 nm	Broadband (HALS)
Compatibility	Excellent in acrylics, polyesters, alkyds	Good	Moderate	High
Volatility	Low	Moderate	Low	Very low
Thermal Stability	High	Moderate	High	Very high
Lightfastness	Excellent	Good	Excellent	Excellent
Cost	Moderate	Low	Moderate-High	High

From this table, it’s clear that UV-1130 strikes a nice balance between cost, effectiveness, and compatibility. While products like Chimassorb 81 offer excellent stability due to their HALS (hindered amine light stabilizer) nature, they come at a premium price and aren’t always necessary unless extreme weathering resistance is required.

UV-1130, on the other hand, provides robust UV protection at a reasonable cost—making it an ideal choice for mid-to-high-end architectural coatings.

Real-World Applications

Let’s move beyond the lab and into the real world. Where exactly do we find UV-1130 being used effectively?

🏗️ Exterior Wall Paints

Exterior paints face the brunt of UV radiation, especially in tropical and subtropical climates. In regions like Southeast Asia, the Middle East, and parts of Australia, buildings are constantly under siege from the sun. Adding UV-1130 to exterior formulations can significantly extend the life of the paint film.

🛠️ Industrial Maintenance Coatings

Industrial facilities, such as oil rigs, pipelines, and steel structures, are often exposed to harsh environmental conditions. UV-1130 helps preserve both the protective and aesthetic qualities of these coatings, reducing maintenance cycles and downtime.

🚢 Marine Coatings

Marine environments are particularly brutal on coatings due to saltwater exposure combined with intense sunlight. UV-1130 has been successfully incorporated into marine-grade coatings to enhance durability and reduce blistering and peeling.

🏡 Roof Coatings

Cool roof technologies often rely on reflective coatings to reduce heat absorption. However, UV degradation remains a concern. UV-1130 helps maintain the integrity of these coatings over time, preserving their thermal performance.

Formulation Tips and Best Practices

Using UV-1130 effectively requires more than just tossing it into the mix. Here are some formulation best practices based on industry experience and academic research:

💧 Waterborne vs. Solvent-Based Systems

UV-1130 is slightly polar and has limited solubility in water. For waterborne systems, consider using dispersants or co-solvents to improve incorporation. In solvent-based systems, UV-1130 dissolves readily in most common solvents like xylene, butyl acetate, and ester-based diluents.

⚖️ Recommended Dosage

The typical dosage range for UV-1130 is between 0.5% to 2.0% by weight of total formulation, depending on the desired level of protection and the resin system used.

Resin Type	Suggested Loading (%)
Acrylic	0.5–1.5
Polyester	1.0–2.0
Alkyd	1.0–2.0
Epoxy	1.0–1.5

Higher loadings may be needed in applications requiring extreme weather resistance or where the coating is thin (<50 μm dry film thickness).

🔋 Synergy with Other Additives

UV-1130 works well in combination with other additives like antioxidants, hindered amine light stabilizers (HALS), and IR blockers. For example:

Antioxidants help prevent oxidative degradation.
HALS provide long-term stabilization by scavenging free radicals.
IR Reflective Pigments reduce heat buildup, indirectly improving UV resistance.

A synergistic blend of UV-1130 + HALS + antioxidant can offer superior performance compared to using UV-1130 alone.

Long-Term Durability: How Well Does It Hold Up?

One of the biggest concerns in architectural coatings is longevity. No one wants to repaint their house every three years. So how does UV-1130 hold up over time?

Several studies have evaluated the performance of UV-1130 in accelerated aging tests and outdoor exposure trials.

A 2019 study published in Progress in Organic Coatings evaluated the performance of various UV absorbers in acrylic-based exterior coatings. The results showed that coatings containing UV-1130 exhibited:

40% less color change after 1,000 hours of QUV exposure
30% lower gloss loss compared to controls
Improved retention of tensile strength

Another field test conducted in Guangzhou, China, monitored the performance of UV-1130-modified coatings on concrete facades over a period of five years. The findings were promising:

Year	Color Change (ΔE)	Gloss Retention (%)	Chalking Level
0	0.2	100	0
1	0.5	98	0
2	1.1	95	0
3	1.9	92	1
4	2.7	89	1
5	3.5	86	2

For comparison, similar coatings without UV-1130 showed ΔE values exceeding 6.0 and significant chalking by year 3.

These results clearly demonstrate that UV-1130 contributes meaningfully to long-term durability.

Environmental and Safety Considerations

With increasing scrutiny on chemicals used in coatings, it’s important to address the safety and environmental profile of UV-1130.

According to the European Chemicals Agency (ECHA), UV-1130 is not classified as carcinogenic, mutagenic, or toxic to reproduction (CMR). It is also not listed as a PBT (Persistent, Bioaccumulative, Toxic) substance.

However, like many organic UV absorbers, UV-1130 has raised concerns in aquatic toxicity studies. Some research suggests that certain benzotriazoles can accumulate in water bodies and affect aquatic organisms at high concentrations.

To mitigate environmental impact:

Use only the recommended dosage
Avoid excessive overspray or runoff
Follow local disposal regulations

Some manufacturers are exploring encapsulated versions of UV-1130 to reduce leaching and improve environmental compatibility—a trend we expect to see grow in the coming years.

Comparative Analysis with Other UV Absorbers

Let’s put UV-1130 in context by comparing it with other commonly used UV absorbers in architectural coatings.

Parameter	UV-1130	UV-531	Tinuvin 1130	Chimassorb 944
UV Absorption Range	300–380 nm	300–370 nm	300–380 nm	HALS (no absorption)
Stabilization Mechanism	UV absorption	UV absorption	UV absorption	Radical scavenging
Compatibility	High	Moderate	High	Moderate
Migration Resistance	High	Low	High	Very high
Weathering Performance	Excellent	Moderate	Excellent	Excellent
Cost	Moderate	Moderate	High	High

Tinuvin 1130 is essentially a commercial version of UV-1130 produced by BASF, offering similar performance but at a higher price point. Chimassorb 944, while not a UV absorber per se, is a HALS additive that complements UV-1130 nicely in multi-functional formulations.

Case Study: High-Performance Facade Coating in Dubai

Dubai presents one of the harshest environments for architectural coatings—extreme heat, intense UV radiation, and high humidity. To evaluate the effectiveness of UV-1130 in real-world conditions, a major paint manufacturer conducted a pilot project on a residential complex in Jumeirah.

Formulation Details:

Base resin: Acrylic dispersion
Pigment volume concentration (PVC): 35%
UV-1130 loading: 1.2%
HALS loading: 0.8%

Results After 3 Years:

Parameter	With UV-1130	Without UV-1130
Color Change (ΔE)	1.8	5.6
Gloss Retention	90%	72%
Surface Chalking	Trace	Moderate
Adhesion (ASTM D3359)	5B	3B

The coating with UV-1130 maintained a fresh appearance and strong adhesion, while the control sample showed noticeable deterioration. This case study underscores the importance of UV protection in demanding climates.

Future Trends and Innovations

As sustainability becomes increasingly central to the coatings industry, several trends are emerging around UV-1130 and related technologies:

🌱 Bio-Based UV Absorbers

Researchers are exploring plant-derived UV absorbers that mimic the performance of synthetic compounds like UV-1130. While still in early stages, these alternatives could reduce dependency on petrochemical feedstocks.

🧪 Encapsulated UV Absorbers

Encapsulation technology is being developed to improve the migration resistance and environmental safety of UV-1130. By locking the molecule inside a protective shell, leaching into the environment is minimized.

🧬 Nanotechnology Integration

Nano-formulations of UV absorbers offer improved dispersion and enhanced protection at lower dosages. Some companies are experimenting with nano-UV-1130 dispersions for ultra-thin coatings with maximum UV protection.

🌐 Digital Formulation Tools

AI and machine learning tools are now helping formulators optimize UV protection strategies. These platforms can predict the performance of different additive combinations, including UV-1130, saving time and resources.

Final Thoughts: UV-1130 – The Unsung Hero of Architectural Coatings

In conclusion, UV-1130 may not be a household name, but it plays a critical role in ensuring that the buildings we live and work in remain vibrant, durable, and resilient against the unforgiving sun.

Its balanced performance, compatibility with a wide range of resins, and proven track record in real-world applications make it a go-to solution for architects, formulators, and contractors who value quality and longevity.

Whether you’re painting a skyscraper in Singapore or touching up the siding on your suburban home, UV-1130 is working quietly behind the scenes—like a faithful bodyguard for your building’s beauty.

So the next time you admire a perfectly preserved façade after a decade of sun and storms, give a silent nod to UV-1130. Because sometimes, the best heroes don’t wear capes—they wear coats of paint.

References

Zhang, L., Liu, H., & Wang, Y. (2019). Performance Evaluation of UV Absorbers in Acrylic-Based Exterior Coatings. Progress in Organic Coatings, 127, 123–130.
Chen, M., Li, X., & Zhou, Y. (2020). Field Aging Study of UV-Modified Concrete Coatings in Southern China. Journal of Coatings Technology and Research, 17(4), 987–995.
European Chemicals Agency (ECHA). (2021). Benzotriazole UV Absorbers: Risk Assessment Report.
BASF Technical Data Sheet. (2022). Tinuvin 1130: Product Information.
Dubey, R., & Patel, N. (2018). Advances in UV Protection Technologies for Architectural Coatings. PaintIndia, 68(6), 45–52.
Al-Mulla, E. A., & Khan, S. U. (2021). Durability Testing of Coatings in Extreme Climates: A Case Study from UAE. Arabian Journal for Science and Engineering, 46(2), 1345–1354.
ISO 11341:2004. Paints and Varnishes – Artificial Weathering and Exposure Testing. International Organization for Standardization.

If you found this article helpful or informative, feel free to share it with your fellow formulators, architects, or anyone who appreciates a good coat of paint—and the science behind it! 🎨☀️🧪

Sales Contact：[email protected]

The role of UV Absorber UV-1130 in maintaining color stability of pigments

The Role of UV Absorber UV-1130 in Maintaining Color Stability of Pigments

Color is more than just a visual delight; it’s a language, a mood-setter, and sometimes even a silent salesperson. From the vibrant red of a sports car to the subtle beige of a living room wall, color plays a crucial role in how we perceive and interact with the world around us. But what happens when that once-vibrant hue starts to fade? When the deep blue of your favorite T-shirt turns pale or the glossy finish of your outdoor furniture loses its luster?

Enter UV absorber UV-1130, a chemical compound that might not be a household name, but one that quietly works behind the scenes to keep our colors looking fresh and true. In this article, we’ll explore the science, application, and importance of UV-1130 in preserving pigment stability — all without the dryness of a chemistry textbook.

🌞 A Quick Recap: Why UV Light Is a Pigment’s Worst Enemy

Before diving into UV-1130 itself, let’s take a moment to understand why ultraviolet (UV) light is such a menace to pigments. UV radiation from sunlight has enough energy to break chemical bonds in organic molecules. For pigments — especially organic ones — this can lead to degradation, fading, yellowing, or discoloration over time.

This process, known as photodegradation, isn’t just an aesthetic issue. It affects product longevity, consumer satisfaction, and even safety in some industrial applications. Whether you’re talking about automotive coatings, textile dyes, or plastic packaging, maintaining color integrity under UV exposure is critical.

So how do we fight back against nature’s invisible bleaching agent? One powerful tool in our arsenal is UV absorbers, and among them, UV-1130 stands out for its efficiency and versatility.

🔬 What Exactly Is UV-1130?

UV-1130, chemically known as 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, is a member of the benzotriazole family of UV absorbers. These compounds are widely used across industries due to their excellent ability to absorb UV light in the 300–380 nm range — the most damaging part of the solar spectrum for many materials.

Let’s break down its basic properties:

Property	Value
Chemical Formula	C₂₆H₂₇N₃O
Molecular Weight	~389.5 g/mol
Appearance	White to off-white powder or granules
Melting Point	145–150°C
Solubility in Water	Insoluble
Solubility in Organic Solvents	Soluble in common solvents like xylene, ethyl acetate, and alcohols
UV Absorption Range	300–380 nm

UV-1130 doesn’t just sit there and soak up UV rays — it does so efficiently and without causing unwanted side effects in the material it protects. This makes it particularly suitable for use in systems where clarity, color retention, and long-term durability are key.

🧪 How Does UV-1130 Work?

Imagine UV-1130 as a tiny sunscreen molecule embedded within a pigment matrix. When UV light hits the surface of a coated material, UV-1130 absorbs the harmful photons and converts that energy into harmless heat through a process called vibrational relaxation.

Here’s a simplified version of what happens at the molecular level:

Absorption: The benzotriazole ring system in UV-1130 captures incoming UV photons.
Energy Conversion: The absorbed energy excites the molecule to a higher electronic state.
Dissipation: The molecule quickly returns to its ground state by releasing the energy as vibrational motion (heat), rather than allowing it to damage nearby pigment molecules.

Unlike some other stabilizers that merely quench free radicals after they form, UV-1130 acts as a first line of defense, intercepting UV radiation before it can initiate the chain reactions that lead to pigment degradation.

🎨 Where Is UV-1130 Used?

UV-1130 finds its home in a variety of applications where pigment stability is paramount. Here’s a snapshot of the major sectors that benefit from its protective powers:

Industry	Application	Benefits
Automotive Coatings	Clear coats, basecoats	Prevents fading and gloss loss on painted surfaces
Plastics & Polymers	PVC, polyolefins, polycarbonates	Maintains original color in outdoor products
Textiles	Dyed fabrics	Reduces fading caused by sun exposure
Printing Inks	Offset, flexographic, digital inks	Preserves print quality and legibility
Wood Finishes	Exterior stains and varnishes	Protects wood grain and color integrity
Cosmetics	Sunscreen formulations, colored cosmetics	Enhances product shelf life and appearance

In each of these fields, UV-1130 serves as a guardian angel for colorants, ensuring that products don’t lose their visual appeal prematurely.

💡 Real-World Performance: Case Studies and Data

To better understand the practical impact of UV-1130, let’s look at a few studies and real-world examples.

📊 Study 1: Effect on Automotive Paint

A study conducted by the Institute of Coatings Technology in Germany compared the performance of two identical clear coat formulations — one containing UV-1130 and the other without. Both were subjected to accelerated weathering tests simulating 3 years of outdoor exposure.

Parameter	Without UV-1130	With UV-1130
Gloss Retention (%)	72%	91%
ΔE* (Color Difference)	4.5	1.2
Yellowing Index Increase	+2.3	+0.6

As shown above, the formulation with UV-1130 significantly outperformed the control sample in terms of both color stability and overall appearance.

📈 Study 2: UV Resistance in Polypropylene Films

Researchers from the University of Science and Technology Beijing tested UV-1130 in polypropylene films dyed with organic pigments. After 1,000 hours of UV aging, the films with UV-1130 retained 95% of their original color intensity, while the unprotected samples dropped to just 68%.

“UV-1130 demonstrated superior protection efficiency without compromising mechanical properties,” the researchers noted. “It’s a promising candidate for long-term UV stabilization in polymer-based packaging materials.” (Journal of Applied Polymer Science, 2021)

🧵 Study 3: Textile Dye Protection

In a collaborative effort between Indian and Japanese scientists, cotton fabrics dyed with reactive blue dye were treated with varying concentrations of UV-1130. The results were striking:

Concentration of UV-1130 (%)	% Color Retention after 150 hrs UV Exposure
0%	62%
0.5%	81%
1.0%	92%
1.5%	94%

Clearly, even small amounts of UV-1130 made a significant difference in protecting fabric dyes from photofading.

⚖️ Dosage and Compatibility: How Much Do You Need?

One of the great things about UV-1130 is that it doesn’t need to be used in large quantities to be effective. Typically, recommended dosages fall in the range of 0.1% to 2% by weight, depending on the application and the expected UV exposure levels.

Material Type	Recommended Dosage (%)
Coatings	0.5–1.5%
Plastics	0.1–1.0%
Textiles	0.5–2.0%
Inks	0.2–1.0%

Importantly, UV-1130 shows good compatibility with a wide range of resins, polymers, and additives. It doesn’t interfere with curing agents, plasticizers, or pigments themselves, making it a versatile choice across different formulations.

That said, as with any additive, proper dispersion is key. Using high-shear mixing or pre-dispersing in a solvent carrier can help ensure uniform distribution throughout the matrix.

🧪 UV-1130 vs Other UV Absorbers: How Does It Stack Up?

There are several types of UV absorbers on the market, including hydroxybenzophenones, hydroxyphenyltriazines, and oxalanilides. Each has its strengths and weaknesses, but UV-1130 holds its own quite well.

Feature	UV-1130	Benzophenone-3	Tinuvin 1577 (Triazine)
UV Absorption Range	300–380 nm	270–340 nm	300–380 nm
Thermal Stability	High	Moderate	High
Migration Resistance	Excellent	Low	Moderate
Cost	Moderate	Low	High
Compatibility	Broad	Good	Narrower (especially with polar resins)
Efficiency	High	Medium	Very High

While UV-1130 may not be the cheapest option, its balance of performance, compatibility, and cost makes it a popular choice for mid- to high-end applications.

🧯 Safety and Environmental Considerations

No discussion of chemical additives would be complete without addressing safety and environmental impact.

UV-1130 is generally considered safe for industrial use, though it should be handled with appropriate personal protective equipment (PPE). According to MSDS data, it has low acute toxicity and is non-irritating to skin and eyes in normal usage conditions.

From an environmental standpoint, UV-1130 is relatively stable and not highly volatile. However, like many organic UV filters, it may pose concerns if released in large quantities into aquatic environments. Proper disposal and waste management practices are essential.

Some recent studies have also explored biodegradable alternatives, but UV-1130 remains a standard due to its proven effectiveness and regulatory acceptance in most global markets.

🛠️ Formulation Tips: Getting the Most Out of UV-1130

If you’re working with UV-1130 in your formulation, here are a few tips to help you get the best results:

Pre-dissolve in solvent: Especially useful in aqueous systems or when working with high-viscosity resins.
Use with HALS for synergistic effect: Combining UV-1130 with hindered amine light stabilizers (HALS) can provide multi-layer protection.
Monitor pH levels: Extreme pH conditions can affect UV-1130’s stability in waterborne systems.
Test under real-world conditions: Accelerated aging tests are helpful, but nothing beats field testing for accuracy.

Remember, UV protection is not a one-size-fits-all game. Tailoring your approach based on the substrate, expected UV load, and end-use environment will yield the best outcomes.

🧭 Looking Ahead: Future Trends and Innovations

As sustainability becomes increasingly important, the industry is exploring greener alternatives to traditional UV absorbers. While UV-1130 remains a staple, researchers are investigating plant-based UV blockers, nanotechnology-enhanced coatings, and bio-compatible stabilizers.

Still, UV-1130 isn’t going anywhere anytime soon. Its proven track record, broad applicability, and favorable performance-to-cost ratio ensure it will remain a go-to solution for pigment protection for years to come.

🧾 Summary Table: UV-1130 at a Glance

Category	Detail
Chemical Name	2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol
CAS Number	1843-05-6
Molecular Weight	~389.5 g/mol
UV Absorption Range	300–380 nm
Typical Use Level	0.1–2.0% wt
Applications	Coatings, plastics, textiles, inks, wood finishes
Advantages	High thermal stability, broad compatibility, efficient UV absorption
Limitations	Slight cost premium, limited solubility in water
Environmental Impact	Generally low, but requires responsible handling and disposal

📚 References

Zhang, L., et al. (2021). "Photostabilization of Polypropylene Films Using Benzotriazole-Based UV Absorbers." Journal of Applied Polymer Science, 138(12), 49876–49884.
Kumar, R., & Tanaka, H. (2019). "Enhancing UV Resistance of Reactive Dyes on Cotton Fabric Using UV-1130." Textile Research Journal, 89(5), 883–891.
Müller, F., & Hoffmann, M. (2020). "Comparative Study of UV Stabilizers in Automotive Coatings." Progress in Organic Coatings, 145, 105710.
Chen, Y., et al. (2018). "Performance Evaluation of Benzotriazole UV Absorbers in Waterborne Systems." Polymer Degradation and Stability, 156, 1–10.
Wang, X., & Li, Z. (2022). "Synergistic Effects of UV-1130 and HALS in Plastic Stabilization." Polymer Testing, 108, 107495.
MSDS for UV-1130, provided by leading chemical suppliers including BASF, Clariant, and Addivant.

✅ Final Thoughts

In the grand theater of materials science, UV-1130 may not be the loudest player, but it’s certainly one of the most reliable. By shielding pigments from the relentless assault of UV radiation, it helps preserve the colors that define our world — from the clothes we wear to the cars we drive and the homes we live in.

So next time you admire a vivid sunset or a perfectly printed poster, remember: somewhere in that paint, ink, or fabric, UV-1130 might just be doing its quiet, unassuming job — keeping color alive, one photon at a time. 🌈✨

Sales Contact：[email protected]

Understanding the broad absorption spectrum of UV Absorber UV-1130

Understanding the Broad Absorption Spectrum of UV Absorber UV-1130

Introduction: A Sunscreen for Your Materials

Imagine a world where everything you touch—your sunglasses, your car dashboard, even your favorite outdoor furniture—is slowly being eaten away by sunlight. Sounds dramatic? Well, it’s not far from the truth. Ultraviolet (UV) radiation from the sun doesn’t just damage our skin; it wreaks havoc on polymers, plastics, coatings, and countless other materials we rely on every day.

Enter UV-1130, a powerful ultraviolet absorber that acts like sunscreen for synthetic materials. But what makes UV-1130 stand out in the crowded field of UV stabilizers is its broad absorption spectrum—a trait that gives it an edge in protecting materials under a variety of conditions. In this article, we’ll dive deep into the science behind UV-1130, explore why its broad absorption range matters, and look at how it’s used across industries to keep things looking new longer.

So grab your metaphorical lab coat, and let’s go on a journey through light, chemistry, and material preservation.

What Exactly Is UV-1130?

Before we get too deep into the weeds, let’s define our subject clearly. UV-1130, also known as 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, is a benzotriazole-based UV absorber. It’s commonly used in polymer systems to protect against degradation caused by UV radiation.

Think of it as a molecular bodyguard—its job is to absorb harmful UV rays before they can cause damage to the host material.

Here are some key physical and chemical properties of UV-1130:

Property	Value/Description
Molecular Formula	C₂₆H₂₃N₃O
Molecular Weight	393.48 g/mol
Appearance	White to off-white powder
Melting Point	~175°C
Solubility in Water	Insoluble
UV Absorption Range	300–385 nm
Compatibility	Polyolefins, polyesters, polycarbonates, etc.
Light Stability	High

As you can see, UV-1130 isn’t just another chemical compound—it’s a well-engineered molecule with specific design features that make it ideal for long-term UV protection.

Why UV Protection Matters: The Degradation Dilemma

Let’s take a moment to understand the enemy: ultraviolet radiation. UV light, particularly in the UVA and UVB ranges, has enough energy to break chemical bonds. When polymers are exposed to UV light over time, their molecular chains begin to degrade—a process known as photodegradation.

The consequences? Brittle plastics, faded colors, weakened mechanical properties, and reduced lifespan of products. Ever seen a garden chair turn chalky white after years outdoors? That’s photodegradation in action.

The Chain Reaction of UV Damage

Photodegradation usually starts with the formation of free radicals—unstable molecules that react aggressively with surrounding material. Once these radicals form, they trigger a cascade of reactions that weaken the polymer structure.

This is where UV absorbers like UV-1130 come in. They intercept UV photons before they can initiate this damaging chain reaction.

The Power of a Broad Absorption Spectrum

Now, here’s where UV-1130 shines—literally. Its broad absorption spectrum means it can absorb UV light across a wide range of wavelengths, typically between 300 and 385 nanometers.

Why does this matter? Because sunlight isn’t a single color—it’s a mixture of different wavelengths. By covering more of the UV spectrum, UV-1130 provides more comprehensive protection than narrow-range absorbers.

Let’s compare UV-1130 with two other common UV absorbers:

UV Stabilizer	Chemical Class	Absorption Range (nm)	Key Features
UV-1130	Benzotriazole	300–385	Broad spectrum, high stability, good compatibility
UV-327	Benzotriazole	300–360	Narrower range, less effective in full sun
UV-531	Benzophenone	280–340	Good for clear resins, but migrates easily

As shown in the table above, UV-1130 covers a wider range than both UV-327 and UV-531. This broader coverage means it can handle more intense or varied UV exposure, making it ideal for applications like automotive parts, agricultural films, and outdoor construction materials.

How Does UV-1130 Work?

Let’s get a bit geeky—but only a little. UV-1130 works by absorbing UV photons and converting them into harmless heat energy. The molecule contains conjugated systems (alternating single and double bonds), which allow electrons to move freely when hit by UV light.

When UV light hits the molecule, electrons get excited and jump to higher energy levels. Then, instead of letting that energy tear apart nearby polymer chains, UV-1130 dissipates it as vibrational energy, i.e., heat. It’s like having a built-in cooling system for your molecules.

This mechanism is called photochemical quenching, and it’s highly efficient in benzotriazole-based compounds like UV-1130.

Applications Across Industries

UV-1130 isn’t picky about where it works—it’s versatile enough to be used in a wide array of materials and industries. Let’s take a tour of where UV-1130 is most commonly found:

1. Automotive Industry

Cars spend a lot of time in the sun. Dashboards, bumpers, and exterior trim made from polypropylene or thermoplastic polyurethane (TPU) can degrade quickly without UV protection.

UV-1130 helps maintain the aesthetic appeal and structural integrity of these components. Its low volatility and high thermal stability make it perfect for high-temperature environments like engine compartments.

“In automotive interiors, UV-1130 has proven to significantly reduce yellowing and cracking in molded parts,” notes a study published in Polymer Degradation and Stability (Zhang et al., 2021).

2. Agricultural Films

Farmers use plastic films to cover greenhouses and soil beds. These films are constantly exposed to sunlight, which can lead to rapid deterioration. UV-1130 helps extend the life of such films, especially in regions with high solar intensity.

One advantage of UV-1130 in agriculture is its low migration tendency, meaning it doesn’t leach out easily into the soil or atmosphere.

3. Coatings and Paints

Whether it’s industrial machinery or outdoor furniture, coatings need to withstand UV exposure. UV-1130 is often added to alkyd, acrylic, and polyester-based coatings to prevent chalking and fading.

Its compatibility with various resins makes it a favorite among paint manufacturers.

4. Consumer Goods

Toys, outdoor furniture, and garden tools all benefit from UV protection. Without additives like UV-1130, these items would fade or crack within months of being left outside.

Advantages of Using UV-1130

Let’s summarize why UV-1130 is such a popular choice:

✅ Broad absorption range: Protects across a large portion of the UV spectrum.
✅ High thermal stability: Doesn’t break down easily during processing.
✅ Low volatility: Stays put in the material rather than evaporating.
✅ Good compatibility: Works well with a variety of polymers.
✅ Long-lasting protection: Offers durable defense against UV-induced degradation.

These advantages aren’t just theoretical—they’ve been backed up by real-world testing and industry reports.

Limitations and Considerations

No product is perfect, and UV-1130 is no exception. Here are a few caveats to consider:

1. Not a Standalone Solution

While UV-1130 is excellent at absorbing UV light, it’s often used in combination with other stabilizers like hindered amine light stabilizers (HALS). Think of it as part of a team effort to protect materials.

2. Limited Solubility in Polar Media

Because UV-1130 is largely nonpolar, it doesn’t dissolve well in water or polar solvents. This can limit its use in certain aqueous formulations unless surfactants or co-solvents are used.

3. Cost Factor

Compared to some older UV absorbers, UV-1130 can be more expensive. However, its efficiency and longevity often justify the higher initial cost.

Environmental and Safety Profile

Safety first! UV-1130 has been evaluated in several toxicological studies, and overall, it’s considered safe for industrial use when handled properly.

According to data from the European Chemicals Agency (ECHA), UV-1130 shows low acute toxicity and is not classified as carcinogenic or mutagenic. Still, like any chemical, it should be handled with appropriate protective gear.

Environmental impact studies suggest that while UV-1130 is persistent in the environment, it has low bioaccumulation potential and minimal aquatic toxicity at typical usage levels.

That said, as with all chemical additives, proper disposal and recycling practices are essential to minimize environmental footprint.

Comparative Studies: UV-1130 vs. Other UV Absorbers

Several comparative studies have been conducted to evaluate UV-1130 against other UV stabilizers.

For instance, a 2020 study published in Journal of Applied Polymer Science compared UV-1130 with UV-327 and UV-531 in polyethylene films exposed to artificial weathering. The results were telling:

Additive	% Retained Tensile Strength After 1000 hrs	Color Change (ΔE)
UV-1130	85%	2.1
UV-327	70%	4.3
UV-531	60%	6.7

Clearly, UV-1130 outperformed the others in maintaining both mechanical and visual integrity of the film.

Another study by Kim et al. (2019) in Polymer Testing showed that UV-1130, when combined with HALS, provided synergistic effects, offering even better protection than either additive alone.

Dosage and Formulation Tips

How much UV-1130 should you use? Like seasoning in cooking, it depends on the recipe—and the application.

Typical dosage ranges:

Plastics: 0.1% – 1.0%
Coatings: 0.5% – 2.0%
Agricultural Films: 0.2% – 0.8%

Too little, and you won’t get adequate protection. Too much, and you risk affecting the transparency or mechanical properties of the material.

Also, UV-1130 is often supplied as a masterbatch, pre-dispersed in a carrier resin to ensure uniform distribution during processing.

Pro tip: Always conduct small-scale trials before full production to determine optimal loading levels.

Regulatory Landscape

UV-1130 is registered under REACH in the EU and listed in the U.S. EPA’s Toxic Substances Control Act (TSCA) inventory. It meets many international standards for use in food-contact materials, though compliance may vary depending on local regulations.

In China, UV-1130 is widely used in industrial applications and is included in the national standard GB/T 18192-2008 for agricultural mulch films.

Always consult local regulatory bodies and safety data sheets (SDS) before use.

Future Outlook and Innovations

The demand for UV-1130 is expected to grow steadily, driven by increasing use in automotive, packaging, and construction sectors. Researchers are also exploring ways to improve its performance further—such as nanoencapsulation to enhance dispersion and reduce required dosages.

Additionally, efforts are underway to develop eco-friendly alternatives with similar efficacy but lower environmental impact. While UV-1130 remains a workhorse in UV protection today, tomorrow might bring greener, smarter versions.

Conclusion: The Invisible Hero of Material Longevity

In a world increasingly dependent on synthetic materials, UV-1130 stands as a quiet guardian against the relentless assault of sunlight. Its broad absorption spectrum, high stability, and compatibility with multiple substrates make it a top-tier choice for engineers and formulators alike.

From the dashboard of your car to the greenhouse where your tomatoes grow, UV-1130 is working behind the scenes to keep things looking fresh and functioning well.

So next time you admire a vibrant red patio chair or a sleek black bumper that hasn’t faded after years in the sun, remember—you might just have UV-1130 to thank.

References

Zhang, L., Wang, Y., & Liu, H. (2021). "Performance Evaluation of Benzotriazole UV Absorbers in Automotive Polymers." Polymer Degradation and Stability, 185, 109456.
Kim, J., Park, S., & Lee, K. (2019). "Synergistic Effects of UV-1130 and HALS in Polymeric Coatings." Polymer Testing, 75, 210–218.
Li, X., Zhao, M., & Chen, G. (2020). "Comparative Study of UV Stabilizers in Agricultural Films." Journal of Applied Polymer Science, 137(24), 48632.
European Chemicals Agency (ECHA). (2023). UV-1130 Substance Information. Helsinki, Finland.
National Institute for Occupational Safety and Health (NIOSH). (2022). Chemical Safety Data Sheet: UV-1130.
GB/T 18192-2008. (2008). Specification for Liquid Fertilizer Irrigation and Fertigation Films in Agriculture. Standardization Administration of China.

If you’re interested in diving deeper into the technical aspects or formulation guidelines, feel free to reach out—we’re always happy to geek out over UV protection! 🌞🔬

Sales Contact：[email protected]

UV Absorber UV-1130 for protecting automotive coatings from UV degradation

UV Absorber UV-1130: The Invisible Guardian of Automotive Coatings

When you think about what keeps your car looking sharp and showroom-ready, the first things that come to mind might be regular waxing, washing, or maybe even a ceramic coating. But beneath all those visible layers is something far less glamorous — yet infinitely more important — when it comes to long-term durability: ultraviolet (UV) protection.

In the world of automotive coatings, UV radiation is Public Enemy No. 1. It’s not just about fading colors or dull finishes; it’s about molecular-level degradation that can compromise the integrity of paint systems over time. That’s where UV absorbers, such as UV-1130, step in — quietly doing their job behind the scenes like the unsung heroes of materials science.

What Is UV-1130?

UV-1130 is a high-performance ultraviolet light stabilizer commonly used in industrial applications, particularly in the formulation of automotive coatings. Its full chemical name is 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, which might sound intimidating, but its function is relatively straightforward: it absorbs harmful UV rays before they can wreak havoc on polymer-based surfaces.

Think of UV-1130 as a sunscreen for your car’s paint — except instead of rubbing it on every few hours, it’s embedded into the coating itself during manufacturing. Pretty clever, right? 🧠

Why UV Protection Matters in Automotive Coatings

Let’s take a moment to appreciate just how tough life is for a car. It sits under the blazing sun, gets drenched in rain, baked by heat, and sometimes even battered by hail. Yet we expect it to look good for years. Without proper UV protection, this would be an impossible task.

UV radiation from the sun causes photooxidation, a process where sunlight breaks down chemical bonds in polymers. In simple terms, this leads to:

Color fading
Chalking (the formation of a powdery residue on the surface)
Cracking
Loss of gloss
Reduced mechanical strength

All of these are signs that the coating is aging prematurely — and none of them are covered by warranty. 😅

This is where UV absorbers like UV-1130 shine — literally and figuratively. By absorbing UV radiation and converting it into harmless heat energy, they act as a shield between the sun’s relentless rays and the vulnerable molecules in the paint.

Key Properties of UV-1130

To understand why UV-1130 is so effective, let’s break down some of its core properties. These aren’t just numbers — they’re the reasons why chemists and engineers love this compound.

Property	Value / Description
Chemical Formula	C₂₆H₂₃N₃O
Molecular Weight	Approximately 385 g/mol
Appearance	Light yellow to brown powder or solid
Solubility in Organic Solvents	Highly soluble in common solvents like xylene, toluene, and esters
UV Absorption Range	Effective absorption between 300–385 nm (UV-A region)
Thermal Stability	Stable up to ~250°C
Compatibility	Compatible with most resin systems including acrylics, polyesters, and alkyds
Recommended Dosage	Typically 0.5–2.0% by weight depending on application and exposure conditions

One of the standout features of UV-1130 is its broad absorption spectrum in the UV-A range, which is particularly damaging to organic coatings. Compared to other benzotriazole-based UV absorbers, UV-1130 has higher molar extinction coefficients, meaning it can absorb more UV energy per unit mass.

Moreover, its alkyl substitution pattern enhances both light stability and compatibility with various coating matrices, making it especially suited for high-performance automotive finishes.

How UV-1130 Works: A Bit of Science Made Simple

Imagine your car’s paint as a fortress made of bricks (polymer chains). UV radiation is like tiny arrows constantly shooting at the walls. Left unchecked, these arrows pierce through and weaken the structure from within.

Now, picture UV-1130 as the archers on the ramparts — they intercept the arrows mid-air, neutralizing the threat before any damage occurs.

Technically speaking, UV-1130 works via excited-state energy transfer. When UV photons hit the molecule, they excite its electrons to a higher energy level. Instead of allowing that energy to cause bond cleavage in nearby polymers, UV-1130 dissipates it as low-level heat through internal conversion.

It’s like having a sponge that soaks up the sun’s rage and releases it gently as warmth — no harm done.

Comparison with Other UV Absorbers

There are several types of UV absorbers used in coatings, each with its own strengths and weaknesses. Let’s compare UV-1130 with some common alternatives:

Type	UV-1130	UV-9 (2-Hydroxy-4-methoxybenzophenone)	Tinuvin 327 (Benzotriazole)	Chimassorb 81 (HALS)
UV Absorption Range	300–385 nm	300–340 nm	300–370 nm	Does not absorb UV directly
Mechanism	Absorption + energy dissipation	UV absorption only	UV absorption	Radical scavenging
Stability	High thermal and light stability	Moderate	High	Very high
Compatibility	Good with most resins	Good	Excellent	Moderate
Typical Use	Automotive, aerospace, plastics	General-purpose coatings	Automotive and industrial	Plastics, textiles
Cost	Moderate	Low	High	Moderate

As shown above, UV-1130 strikes a nice balance between performance and practicality. While Tinuvin 327 may offer better UV cut-off, it often comes with a steeper price tag. Meanwhile, Chimassorb 81, a hindered amine light stabilizer (HALS), doesn’t absorb UV directly but instead traps free radicals — a complementary mechanism that can be used alongside UV-1130 for synergistic protection.

Applications in the Automotive Industry

The automotive industry is one of the largest consumers of UV-absorbing additives. From OEM (Original Equipment Manufacturer) clearcoats to refinish paints, UV-1130 plays a critical role in extending the service life of vehicles.

Clearcoat Protection

Modern automotive finishes typically consist of a basecoat/clearcoat system. The basecoat provides color, while the clearcoat offers gloss, depth, and protection. Since the clearcoat is transparent, it’s exposed to the full brunt of UV radiation — making it the ideal candidate for UV absorber incorporation.

Studies have shown that adding UV-1130 at 1–1.5% concentration in the clearcoat significantly improves resistance to yellowing and gloss loss after accelerated weathering tests. 🌞

Plastic Components

Beyond paint, UV-1130 is also used in plastic parts such as bumpers, spoilers, and exterior trim. These components, often made from thermoplastic polyurethane (TPU) or polycarbonate blends, are equally vulnerable to UV-induced embrittlement and discoloration.

In fact, many manufacturers blend UV-1130 with HALS compounds to provide multi-layered protection — one absorbing UV, the other quenching reactive species formed during degradation.

Performance Testing and Standards

To ensure that UV-1130 performs as expected in real-world conditions, it undergoes rigorous testing using standardized methods. Some of the most common include:

Test Method	Description	Duration / Conditions
ASTM D4587	Accelerated weathering using fluorescent UV lamps and condensation	1000–3000 hours UV exposure
ISO 4892-3	Similar to ASTM D4587, widely used internationally	Varies based on standard
SAE J2527	Simulates Florida exposure using xenon arc lamps	Up to 1000 hours
QUV Weatherometer	Chamber-based UV aging simulation	Controlled cycles of UV, moisture, and heat

Results from these tests consistently show that UV-1130-treated coatings exhibit significantly lower ΔE values (color difference measurements) and retained gloss levels compared to untreated samples.

For example, a 2018 study published in Progress in Organic Coatings found that after 2000 hours of QUV exposure, coatings containing UV-1130 showed only a 5% reduction in gloss, whereas control samples without UV protection experienced a 30% drop. 📉

Environmental and Safety Considerations

With growing concerns over chemical safety and environmental impact, it’s important to evaluate UV-1130 from an eco-friendly perspective.

According to the European Chemicals Agency (ECHA) and the U.S. Environmental Protection Agency (EPA), UV-1130 is not classified as carcinogenic, mutagenic, or toxic to reproduction. It also does not bioaccumulate easily in aquatic organisms due to its moderate water solubility and tendency to bind to soil particles.

That said, like any industrial chemical, it should be handled with care. Proper PPE (gloves, goggles, respirators) should be worn during handling, and waste should be disposed of according to local regulations.

Market Trends and Future Outlook

The global market for UV absorbers is projected to grow steadily, driven largely by demand from the automotive and construction industries. According to a 2023 report by MarketsandMarkets™, the UV stabilizers market is expected to reach $1.5 billion by 2028, with benzotriazole-type absorbers like UV-1130 holding a significant share.

What’s fueling this growth?

Increasing production of electric vehicles (EVs), which often feature advanced composite materials requiring UV protection
Rising consumer expectations for longer-lasting, high-gloss finishes
Regulatory pushes for durable, low-VOC coatings

Some companies are even exploring nanoencapsulation technologies to improve the dispersion and longevity of UV-1130 in aqueous systems — a promising avenue for future development.

Conclusion: The Quiet Protector

In the grand scheme of automotive engineering, UV-1130 might seem like a small cog in a very large machine. But scratch beneath the surface (pun intended), and you’ll find that it plays a pivotal role in ensuring that cars stay beautiful, functional, and resistant to the ravages of time.

So next time you admire a car gleaming under the sun, remember — there’s more than meets the eye. Behind that glossy finish is a whole team of invisible protectors, with UV-1130 leading the charge.

And who knows, maybe one day we’ll have self-repairing paints and quantum shields against UV — but until then, UV-1130 remains our best bet at keeping things shiny. ✨🚗

References

Zhang, Y., et al. (2018). "Effect of UV Absorbers on the Durability of Automotive Clearcoats." Progress in Organic Coatings, 121, 45–52.
Smith, R. & Johnson, L. (2020). "Photostabilization of Polymer Coatings: Mechanisms and Additives." Journal of Coatings Technology and Research, 17(4), 891–904.
European Chemicals Agency (ECHA). (2021). UV-1130 Substance Evaluation Report. Helsinki: ECHA Publications.
Wang, H., et al. (2019). "Synergistic Effects of UV-1130 and HALS in Polyurethane Coatings." Polymer Degradation and Stability, 165, 112–120.
MarketsandMarkets™. (2023). UV Stabilizers Market – Global Forecast to 2028. Pune: MarketsandMarkets™ Research Private Ltd.
American Society for Testing and Materials (ASTM). (2017). Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings. ASTM D4587-17.
International Organization for Standardization (ISO). (2013). Plastics – Methods of Exposure to Laboratory Light Sources – Part 3: Fluorescent UV Lamps. ISO 4892-3:2016.
Society of Automotive Engineers (SAE). (2012). Accelerated Exposure of Automotive Interior Trim Components Using a Controlled Irradiance Xenon Arc Apparatus. SAE J2527.

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Improving the long-term durability of industrial coatings with UV Absorber UV-1130

Improving the Long-Term Durability of Industrial Coatings with UV Absorber UV-1130

Introduction: A Battle Against Sunlight

Imagine your favorite pair of sunglasses. You wear them to protect your eyes from harsh sunlight, right? Now, picture an industrial coating — a tough-looking layer that protects massive steel structures, concrete buildings, or even your car’s glossy paint job — exposed not just to rain and wind, but also to relentless ultraviolet (UV) radiation. Unlike humans, these coatings don’t have the luxury of slipping on a pair of shades when the sun gets too strong.

That’s where UV absorbers come in — the unsung heroes of material science. In this article, we’ll dive deep into one such compound: UV Absorber UV-1130, and explore how it plays a critical role in enhancing the long-term durability of industrial coatings. We’ll walk through its chemical properties, performance metrics, application techniques, and real-world impact — all while keeping things engaging, informative, and maybe even a little fun.

Chapter 1: Understanding UV Degradation in Industrial Coatings

Why Do Coatings Fade?

Sunlight isn’t just warm and bright; it carries invisible energy in the form of ultraviolet radiation. This high-energy light can wreak havoc on polymer-based materials, including paints and protective coatings. Over time, exposure to UV rays causes:

Color fading
Chalking (powdery surface degradation)
Cracking
Loss of gloss
Reduced adhesion

This process is called photodegradation, and it’s essentially a slow-motion version of your skin getting sunburned — except instead of sunscreen, industrial coatings need specialized additives like UV absorbers to stay protected.

The Role of UV Absorbers

UV absorbers work by absorbing harmful UV photons and converting them into harmless heat energy. Think of them as tiny umbrellas embedded inside the coating, constantly shielding the material from the sun’s damaging effects.

There are several types of UV absorbers, including:

Type	Mechanism	Examples
Benzophenones	Absorb UV-A radiation	BP-1, BP-3
Benzotriazoles	Broad-spectrum UV protection	Tinuvin 326, Tinuvin 328
Hydroxyphenyltriazines	High-performance UV stabilization	Cyasorb UV-1164
HALS (Hindered Amine Light Stabilizers)	Radical scavengers	Tinuvin 770, Chimassorb 944
Triazines	Synergistic stabilizers	UV-1130

Among these, UV-1130, a triazine-based compound, has gained attention for its synergistic effect when combined with other UV absorbers and antioxidants.

Chapter 2: What Is UV Absorber UV-1130?

Let’s get up close and personal with our star additive.

Chemical Identity

UV-1130, also known as 2,4-Bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-octyloxyphenyl)-s-triazine, is a multi-functional triazine-based UV absorber. It belongs to the class of hydroxyphenyltriazines, which are known for their excellent UV absorption capabilities and thermal stability.

Key Features

Here’s what makes UV-1130 stand out:

Property	Description
Chemical Formula	C₃₆H₄₁N₃O₂
Molecular Weight	~539.7 g/mol
Appearance	White to off-white powder
Solubility	Insoluble in water, soluble in organic solvents
Melting Point	~105–110°C
UV Absorption Range	300–380 nm (UV-A region)
Thermal Stability	Up to 250°C
Compatibility	Compatible with polyolefins, polyesters, acrylics, and alkyds

How Does It Work?

UV-1130 works by intercepting UV photons before they can initiate oxidative reactions in the polymer matrix. It doesn’t just absorb UV light; it also acts as a free radical scavenger, preventing chain scission and cross-linking reactions that lead to mechanical failure in coatings.

Think of it as both a bodyguard and a cleanup crew — it blocks incoming threats and mops up any mess left behind.

Chapter 3: Performance Evaluation of UV-1130 in Industrial Coatings

Now that we know what UV-1130 is, let’s see how well it performs under real-world conditions.

Test Methodology

To evaluate the effectiveness of UV-1130, researchers typically conduct accelerated weathering tests using devices like QUV Accelerated Weathering Chambers. These simulate years of outdoor exposure in just weeks by cycling between UV exposure and moisture.

A typical test protocol might include:

UV Exposure: UVA-340 lamps, 8 hours at 60°C
Condensation Cycle: 4 hours at 50°C
Total Duration: 500–2000 hours

The results are then analyzed based on:

Gloss retention
Color change (ΔE value)
Chalking level
Adhesion strength

Comparative Study: UV-1130 vs Other UV Absorbers

Let’s take a look at how UV-1130 stacks up against some commonly used UV stabilizers.

Parameter	UV-1130	Tinuvin 328	Tinuvin 1130*	Chimassorb 944
UV Absorption Range	300–380 nm	300–370 nm	300–380 nm	N/A (HALS)
Thermal Stability	Up to 250°C	Up to 200°C	Up to 250°C	Up to 300°C
Compatibility	Good	Good	Excellent	Excellent
Gloss Retention (after 1000h QUV)	85%	72%	88%	80%
ΔE Value (color change)	<1.2	2.1	<1.0	1.5
Synergistic Effect	Strong with HALS	Moderate	Strong	Very strong

*Note: Tinuvin 1130 is chemically similar to UV-1130 but often used in commercial blends.

From the table above, it’s clear that UV-1130 offers superior UV protection and excellent compatibility with various resin systems. When used in combination with HALS stabilizers, its performance is further enhanced, making it a top choice for demanding applications.

Chapter 4: Real-World Applications of UV-1130

Automotive Coatings

In the automotive industry, where aesthetics and protection go hand-in-hand, UV-1130 helps preserve the gloss and color integrity of topcoats. It’s especially effective in metallic and pearlescent finishes, which are more susceptible to UV-induced fading.

Marine and Offshore Coatings

Ships, offshore platforms, and coastal infrastructure endure extreme UV exposure and salt spray corrosion. UV-1130 enhances the weather resistance of epoxy and polyurethane coatings used in these environments.

Architectural and Construction Coatings

Exterior paints and sealants on buildings face daily bombardment from UV rays. UV-1130 helps maintain the structural integrity and appearance of these coatings for decades.

Aerospace Industry

In aerospace, every gram counts, but so does longevity. UV-1130 is used in lightweight composite coatings that must withstand high-altitude UV exposure without adding unnecessary weight.

Chapter 5: Formulation Tips and Best Practices

Adding UV-1130 to a coating formulation isn’t as simple as tossing sugar into coffee. There are a few best practices to follow to maximize its effectiveness.

Recommended Dosage

The optimal loading level of UV-1130 depends on the type of coating and the expected environmental stress. Generally, the following dosage ranges are recommended:

Coating Type	Recommended Dosage (wt%)
Waterborne Acrylics	0.2–0.5%
Solventborne Polyurethanes	0.5–1.0%
Powder Coatings	0.5–1.5%
Epoxy Resins	0.3–1.0%

Synergistic Combinations

As mentioned earlier, UV-1130 works best when paired with HALS stabilizers. Some common synergistic combinations include:

UV-1130 + Tinuvin 770
UV-1130 + Chimassorb 944
UV-1130 + Irganox 1010 (antioxidant)

These combinations provide multi-level protection, covering both primary UV absorption and secondary radical scavenging.

Processing Considerations

UV-1130 should be added during the dispersion phase to ensure uniform distribution.
Avoid prolonged exposure to high shear forces, which may degrade the molecule.
For powder coatings, pre-mix UV-1130 with extender pigments to improve dispersion.

Chapter 6: Environmental and Safety Profile

No discussion about additives would be complete without addressing safety and sustainability.

Toxicity and Handling

UV-1130 is considered low toxicity and safe for industrial use when handled properly. According to the Material Safety Data Sheet (MSDS), it is non-flammable and poses minimal risk via inhalation or skin contact. Still, proper PPE (gloves, goggles, mask) is recommended during handling.

Regulatory Compliance

UV-1130 complies with major global regulations, including:

REACH (EU) – No SVHC substances identified
OSHA (USA) – Non-hazardous classification
RoHS & REACH Exemptions – Meets requirements for electronics and construction industries

Eco-Friendliness

While UV-1130 is not biodegradable, it does not contain heavy metals or persistent organic pollutants (POPs). Efforts are ongoing to develop greener alternatives, but for now, UV-1130 remains a responsible choice for long-lasting protection.

Chapter 7: Case Studies and Field Trials

Let’s look at some real-life examples of how UV-1130 has made a difference.

Case Study 1: Outdoor Steel Structures in Southern China

Project: Bridge deck coating system
Coating Type: Two-component polyurethane
Additives Used: UV-1130 (0.8%), Tinuvin 770 (0.5%)
Duration: 5-year exposure
Results:

Gloss retention: 88%
ΔE value: 1.1
No chalking or cracking observed

Conclusion: UV-1130 significantly improved the weathering performance of the coating under tropical UV conditions.

Case Study 2: Automotive Refinish Coatings in Arizona

Project: Paint booth trial
Coating Type: Basecoat-clearcoat system
Additives Used: UV-1130 (0.6%), Irganox 1010 (0.3%)
Duration: 18 months outdoor exposure
Results:

Clearcoat gloss loss: <5%
Color shift (white paint): ΔE = 0.9
Improved scratch resistance

Conclusion: UV-1130 helped maintain aesthetic quality and extended service life of refinished vehicles.

Chapter 8: Future Outlook and Emerging Trends

As industries move toward longer-lasting, sustainable, and multifunctional coatings, the demand for advanced UV protection will only grow.

Some emerging trends include:

Nano-encapsulated UV absorbers for controlled release
Hybrid UV-HALS compounds for simplified formulations
Bio-based UV blockers derived from plant extracts
Smart coatings that self-repair upon UV damage

While UV-1130 may not be the final answer to UV degradation, it certainly paves the way for future innovations. 🌞✨

Conclusion: A Shield That Lasts

In the world of industrial coatings, durability is king. And UV-1130 stands tall among the knights guarding this kingdom. With its broad UV absorption range, thermal resilience, and strong synergistic behavior, it’s no wonder why engineers and chemists alike keep reaching for it.

Whether you’re protecting a skyscraper, a ship, or a shiny new car, UV-1130 offers peace of mind — knowing that your coating will stand the test of time, sun after sun.

So next time you see a gleaming surface that looks fresh even after years outdoors, tip your hat to UV-1130 — the silent guardian of shine and structure.

References

Smith, J., & Lee, H. (2020). Advances in UV Stabilization of Polymer Coatings. Journal of Coatings Technology and Research, 17(4), 883–895.
Zhang, Y., et al. (2021). "Synergistic Effects of UV-1130 and HALS in Automotive Clearcoats." Progress in Organic Coatings, 152, 106132.
European Chemicals Agency (ECHA). (2022). REACH Registration Dossier for UV-1130.
Wang, L., & Chen, M. (2019). "Durability Enhancement of Marine Coatings Using Triazine-Based UV Absorbers." Corrosion Science, 157, 108021.
ASTM G154-16. (2016). Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials.
Iwata, K., et al. (2018). "Photostability of Epoxy Resin Coatings Containing UV-1130." Polymer Degradation and Stability, 153, 121–129.
BASF Technical Bulletin. (2020). Stabilizer Solutions for Industrial Coatings.
Li, X., & Zhao, R. (2023). "Recent Developments in UV Protection Additives for Sustainable Coatings." Green Chemistry Letters and Reviews, 16(1), 45–58.

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The effectiveness of UV Absorber UV-1130 in waterborne and solventborne systems

The Effectiveness of UV Absorber UV-1130 in Waterborne and Solventborne Systems

When it comes to protecting materials from the sun’s relentless ultraviolet (UV) radiation, we often don’t realize how much effort goes into ensuring that our paints, coatings, plastics, and even textiles remain vibrant and durable. One unsung hero in this battle against UV degradation is a compound known as UV-1130, a benzotriazole-type UV absorber with a growing reputation across multiple industries.

In this article, we’ll dive deep into what makes UV-1130 such a powerful tool for UV protection, especially when used in waterborne and solventborne systems. We’ll explore its chemical properties, compare its performance in different formulations, look at real-world applications, and even throw in a few fun analogies to keep things light — because science doesn’t always have to be dry (unless you’re talking about solventborne systems, which ironically can be quite wet).

Let’s get started!

What Is UV-1130?

UV-1130 belongs to the benzotriazole family of UV absorbers, which are among the most widely used additives for photostabilization. Its full chemical name is 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol, and it’s typically used to protect organic materials from UV-induced degradation by absorbing harmful UV radiation and converting it into harmless heat energy.

Think of it like sunscreen for your car paint or your outdoor furniture — only instead of rubbing it on, you mix it into the coating itself.

Here’s a quick snapshot of its basic parameters:

Property	Value / Description
Chemical Name	2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Molecular Formula	C₂₁H₂₇N₃O
Molecular Weight	~325 g/mol
Appearance	Yellowish powder or solid
Solubility in Water	Low
Solubility in Organic Solvents	High (especially in aromatic solvents)
UV Absorption Range	300–380 nm
Recommended Dosage	0.1% – 1.0% by weight

Now that we’ve introduced our star player, let’s see how it performs on the field — specifically, in waterborne and solventborne systems.

UV-1130 in Solventborne Systems: A Classic Match

Solventborne systems — think traditional automotive paints, industrial coatings, and some adhesives — are where UV-1130 really shines. Why? Because these systems use organic solvents like xylene, toluene, or ketones, which are ideal for dissolving UV-1130 and allowing it to disperse evenly throughout the formulation.

Advantages of Using UV-1130 in Solventborne Systems:

Excellent Compatibility: UV-1130 blends well with resins like polyurethanes, acrylics, and alkyds commonly found in solventborne coatings.
High Efficiency: It offers strong absorption in the UV range (especially around 340–350 nm), where many polymers are most vulnerable.
Thermal Stability: It remains stable under high curing temperatures, making it suitable for baking finishes.
Long-Lasting Protection: Thanks to its molecular structure, UV-1130 doesn’t easily volatilize or migrate out of the film.

Let’s take a look at how UV-1130 stacks up against other common UV absorbers in solventborne systems:

UV Absorber	UV Absorption Range	Compatibility	Volatility	Typical Use Case
UV-1130	300–380 nm	Excellent	Low	Automotive, Industrial Coatings
UV-327	300–375 nm	Good	Medium	Plastics, Adhesives
UV-531	300–370 nm	Moderate	High	General Coatings
Tinuvin 99	Hindered Amine Light Stabilizer (HALS)	Varies	Low	Long-term weathering protection

One study published in Progress in Organic Coatings (Zhang et al., 2019) compared various UV absorbers in solventborne automotive clear coats and found that UV-1130 provided superior gloss retention and color stability after 1,000 hours of accelerated weathering tests.

“UV-1130 demonstrated excellent performance in terms of maintaining both visual appearance and mechanical integrity,” the authors noted.

So if you’re working with a solvent-based system, UV-1130 is definitely one to consider.

UV-1130 in Waterborne Systems: The Challenge and the Triumph

Now here’s where things get interesting — and a bit more complex.

Waterborne systems are all the rage these days due to their lower VOC (volatile organic compound) emissions and environmental benefits. But they also pose a challenge for UV absorbers like UV-1130, which isn’t particularly water-soluble. In fact, UV-1130 is practically hydrophobic, which means it doesn’t play nice with water unless some clever chemistry is involved.

But don’t count UV-1130 out just yet.

Thanks to advances in formulation techniques — such as microencapsulation, surfactant-assisted dispersion, and the use of co-solvents — UV-1130 can still be effectively incorporated into waterborne systems. And when done right, the results are impressive.

Strategies for Incorporating UV-1130 into Waterborne Systems:

Strategy	Description
Microencapsulation	Encasing UV-1130 in a protective shell to improve dispersibility in water
Surfactant-Assisted Dispersion	Using surfactants to reduce surface tension and help UV-1130 disperse evenly
Co-Solvent Addition	Mixing small amounts of water-miscible solvents (like glycols or esters) to aid dissolution
Emulsification	Creating stable emulsions using high-shear mixing and appropriate emulsifiers

A 2020 study published in the Journal of Applied Polymer Science (Chen & Liu) looked at the effectiveness of UV-1130 in waterborne acrylic coatings. They found that when UV-1130 was dispersed using a combination of surfactants and a small amount of ethylene glycol, it significantly improved the coating’s resistance to yellowing and cracking under UV exposure.

“Even though UV-1130 is not inherently water-soluble, proper formulation can make it a viable and effective UV protection agent in aqueous systems,” concluded the researchers.

Another point worth mentioning is that UV-1130, unlike some other UV absorbers, does not tend to cause foam issues or affect the rheology of waterborne systems too drastically — which is a big win for formulators who already have enough on their plates.

Performance Comparison: UV-1130 in Both Worlds

Let’s put it all together in a side-by-side comparison to highlight the strengths and limitations of UV-1130 in both types of systems.

Feature	Solventborne Systems	Waterborne Systems
UV Protection Efficacy	High	High (with proper formulation)
Ease of Incorporation	Easy (due to compatibility with solvents)	Challenging but manageable
Environmental Impact	Higher VOC content	Lower VOC content
Cost	Moderate	Slightly higher due to formulation complexity
Film Clarity	Excellent	Can vary depending on dispersion method
Thermal Stability	High	Moderate to High
Shelf Life	Long	Depends on formulation stability

As you can see, UV-1130 holds its own in both environments — with the caveat that waterborne systems require a bit more finesse.

Real-World Applications of UV-1130

Let’s move from theory to practice and explore some of the industries where UV-1130 is making a difference.

🚗 Automotive Industry

Automotive coatings are constantly exposed to sunlight, temperature fluctuations, and road debris. UV-1130 is often added to clear coats to prevent fading, chalking, and loss of gloss. Some OEM manufacturers have reported up to 30% improvement in weathering performance when UV-1130 is included in their formulations.

🏗️ Construction and Architectural Coatings

Exterior architectural coatings — whether on concrete, wood, or metal — benefit greatly from UV protection. UV-1130 helps preserve the aesthetic appeal and structural integrity of these surfaces over time. In a case study by BASF (2021), UV-1130 was shown to extend the service life of exterior masonry coatings by an average of 2–3 years.

🛠️ Industrial Maintenance Coatings

These coatings protect everything from pipelines to machinery in harsh environments. UV-1130 plays a critical role in preventing premature failure caused by UV degradation, especially in tropical and arid climates.

🧴 Consumer Goods

From plastic garden furniture to outdoor toys, UV-1130 finds its way into molded products to maintain color and durability. Some studies suggest that incorporating UV-1130 during the extrusion process can lead to up to 50% slower color fade in polypropylene-based products.

Formulation Tips and Tricks

Whether you’re working with waterborne or solventborne systems, here are some best practices to get the most out of UV-1130:

Start Small, Then Scale Up
Begin with a dosage of around 0.2–0.5% by weight and adjust based on testing. Overdosing won’t necessarily give better results and might cause side effects like blooming or discoloration.
Pair It With HALS for Synergy
Combine UV-1130 with a hindered amine light stabilizer (HALS) like Tinuvin 770 or Chimassorb 944 for enhanced long-term protection. This dynamic duo works like sunscreen + moisturizer — one blocks UV rays, the other repairs damage.
Use Proper Dispersion Equipment
Especially important in waterborne systems. High-shear mixers or ultrasonic homogenizers can help break down UV-1130 particles and ensure even distribution.
Test Under Realistic Conditions
Accelerated weathering tests (e.g., QUV or Xenon Arc) are essential, but don’t forget natural exposure trials. Real sun sometimes behaves differently than lab lights.
Monitor for Migration
While UV-1130 is relatively non-migratory, in soft or flexible substrates, it may slowly move toward the surface over time. Consider encapsulation if this becomes an issue.

Safety, Regulations, and Sustainability

No discussion of additives would be complete without touching on safety and regulatory compliance.

UV-1130 is generally considered safe when used within recommended concentrations. It has been evaluated by several regulatory bodies, including the U.S. EPA and European REACH, and is listed in the Toxic Substances Control Act (TSCA) inventory.

However, as with any chemical, proper handling is key:

Wear gloves and eye protection
Avoid inhalation of dust
Store in a cool, dry place away from direct sunlight

Environmental impact is minimal, especially in properly cured coatings where UV-1130 becomes part of the polymer matrix. That said, ongoing research is exploring biodegradable alternatives — something to keep an eye on for the future.

Final Thoughts

UV-1130 may not be a household name, but it’s quietly revolutionizing how we protect materials from the sun. Whether in high-performance solventborne coatings or eco-friendly waterborne systems, UV-1130 proves that with the right formulation, you can have both efficiency and sustainability.

It’s like that friend who knows how to fit in anywhere — whether it’s at a fancy cocktail party (solventborne) or a backyard barbecue (waterborne). All you need is the right introduction.

So next time you admire the glossy finish of a new car or enjoy the vibrancy of your patio furniture after a summer season, tip your hat to UV-1130 — the invisible shield standing between your favorite materials and the sun’s harmful rays.

☀️ Stay protected. Stay colorful.

References

Zhang, Y., Li, M., & Wang, H. (2019). Performance Evaluation of UV Absorbers in Automotive Clear Coats. Progress in Organic Coatings, 135, 105–112.
Chen, L., & Liu, J. (2020). Formulation Strategies for UV-1130 in Waterborne Acrylic Coatings. Journal of Applied Polymer Science, 137(21), 48912.
BASF Technical Bulletin. (2021). Enhancing Weather Resistance in Masonry Coatings Using UV-1130. Ludwigshafen, Germany.
European Chemicals Agency (ECHA). (2023). REACH Registration Dossier for UV-1130.
U.S. Environmental Protection Agency. (2022). Chemical Fact Sheet: UV-1130.

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