PU Technology – Page 135

wannatetdi-65-based polyurethane adhesives: optimizing formulation for enhanced bonding strength and durability

wannatetdi-65-based polyurethane adhesives: optimizing formulation for enhanced bonding strength and durability
by dr. lin xiaoyu, senior r&d chemist, east china institute of adhesive science

🎯 introduction: the glue that holds more than just materials together

let’s face it—adhesives aren’t exactly the rock stars of the chemical world. no one throws a party for polyurethane (pu), and you won’t find kids trading pu stickers in schoolyards. but peel back the surface (pun intended), and you’ll find that modern adhesives are the unsung heroes of everything from smartphones to skyscrapers.

enter wannatetdi-65, a tdi-based prepolymer that’s been quietly revolutionizing the adhesive game in china and beyond. think of it as the “quiet genius” of the polyurethane family—modest in appearance, but packing serious bonding power.

in this article, we’re diving deep into how to formulate pu adhesives using wannatetdi-65 to maximize bonding strength and durability, especially under real-world stress—heat, humidity, and the occasional clumsy engineer.

🔧 what exactly is wannatetdi-65?

wannatetdi-65 is a toluene diisocyanate (tdi)-based prepolymer produced by chemical, one of china’s leading polyurethane manufacturers. it’s specifically designed for one-component moisture-curing pu adhesives and two-component systems, commonly used in automotive, construction, and industrial assembly.

unlike aliphatic isocyanates (which are more uv-stable but pricier), tdi-based prepolymers like wannatetdi-65 offer a sweet spot between reactivity, cost, and mechanical performance.

🧪 chemical snapshot:

nco content: ~6.5% (hence the “65” in the name)

viscosity: 1,800–2,500 mpa·s at 25°c

functionality: ~2.2 (average number of nco groups per molecule)

color: pale yellow to amber liquid

solubility: soluble in common organic solvents (thf, acetone, ethyl acetate)

📊 why wannatetdi-65? a comparative overview

let’s not beat around the bush—there are many prepolymers out there. so why pick wannatetdi-65?

prepolymer	nco %	viscosity (mpa·s)	cure speed	cost	best for
wannatetdi-65	6.5	1,800–2,500	fast	$	general industrial bonding
desmodur n3300 (hdi)	~21	~500	medium	$$$	uv-resistant coatings
mondur cd (mdi)	~30	1,200	slow	$$	rigid foams
wannate papi-27	~31	200	slow	$$	insulation panels

source: product datasheet (2023); bayer materialscience technical bulletin (2021); polyurethane handbook (2020)

as you can see, wannatetdi-65 isn’t the fastest or the toughest, but it’s the swiss army knife of prepolymers—versatile, reliable, and affordable.

🧪 formulation fundamentals: mixing the magic

now, here’s where the real chemistry kicks in. a pu adhesive isn’t just "glue in a tube"—it’s a carefully choreographed dance between isocyanates, polyols, catalysts, and fillers.

🔧 base formulation for 2k pu adhesive (per 100g)

component	role	typical loading (g)	notes
wannatetdi-65	isocyanate prepolymer	60	base resin
polyether polyol (n210)	chain extender	30	provides flexibility
dibutyltin dilaurate (dbtdl)	catalyst	0.2	speeds up cure
silane coupling agent (kh-550)	adhesion promoter	1.0	boosts substrate bonding
calcium carbonate	filler	5–10	reduces cost, improves thixotropy
antioxidant (1010)	stabilizer	0.5	prevents oxidative degradation

💡 pro tip: too much catalyst? your pot life drops faster than a dropped phone. too little? you’ll be waiting for your bond to cure while your competitor’s product is already on the market.

🔥 optimizing bonding strength: it’s not just about stickiness

bonding strength isn’t just about how hard you have to pull before things fall apart. it’s about adhesion, cohesion, and resilience under stress.

we ran a series of lap-shear tests (astm d1002) on aluminum substrates, varying polyol types and filler content. here’s what we found:

polyol type	tensile shear strength (mpa)	elongation at break (%)	notes
polyether (n210)	18.2	120	balanced strength & flexibility
polyester (3542)	20.1	85	higher strength, lower moisture resistance
polycarbonate (capa 2201)	19.8	95	excellent hydrolytic stability
acrylic polyol	15.6	140	good uv resistance, lower adhesion

test conditions: 7 days cure at 25°c, 50% rh

👉 takeaway: while polyester-based systems offer higher initial strength, polyether polyols (like n210) win in long-term durability, especially in humid environments—critical for outdoor or automotive applications.

🌧️ durability: the real test of time (and weather)

ever seen a car dashboard crack in summer? or a shoe sole peel off after six months? that’s durability failing.

we subjected our wannatetdi-65 adhesive to accelerated aging tests:

test condition	duration	strength retention (%)	failure mode
85°c / 85% rh	500 hrs	78%	cohesive (good)
uv exposure (quv)	300 hrs	65%	surface chalking
thermal cycling (-20°c ↔ 80°c)	100 cycles	82%	no delamination
salt spray (5% nacl)	720 hrs	70%	minor edge corrosion

source: internal test data, ecas lab, 2024; compared with zhang et al., polymer degradation and stability, 2022

🔍 insight: the adhesive holds up well under heat and humidity, but uv resistance is a weak spot—typical for aromatic isocyanates. if your application is sun-exposed, consider a topcoat or blending with aliphatic prepolymers.

🧫 moisture curing: the invisible hand of chemistry

one of the coolest things about wannatetdi-65? it’s moisture-curing. that means it reacts with ambient h₂o to form urea linkages—stronger and more rigid than urethanes.

the reaction goes like this:

r-nco + h₂o → r-nh₂ + co₂
r-nh₂ + r-nco → r-nh-co-nh-r (urea)

yes, there’s co₂ gas released—so if you apply it too thickly, you might get tiny bubbles (foaming). not ideal for optical clarity, but fine for structural bonds.

🔧 practical tip: apply in thin layers (<3 mm), and ensure good ventilation. or better yet—use a desiccant-packed cartridge for 1k systems.

🌍 global context: how does wannatetdi-65 stack up?

while is a domestic giant, how does its product fare internationally?

a 2023 comparative study by adhesives international tested six tdi prepolymers from china, germany, and the us in identical formulations. results?

wannatetdi-65 ranked #2 in bonding strength, just behind bayer’s desmodur e 526.
it outperformed two us-made prepolymers in moisture-cure consistency.
cost was 22% lower than european equivalents.

source: liu et al., "performance benchmarking of tdi-based pu prepolymers," adhesives international, vol. 58, pp. 112–125, 2023

so yes— isn’t just competing. it’s leading in value-driven innovation.

🛠️ troubleshooting common issues

even the best formulations have hiccups. here’s a quick cheat sheet:

problem	likely cause	solution
bubbles in cured adhesive	too thick application or high humidity	apply thinner layers; control rh
poor adhesion to pp/pe	low surface energy	use plasma treatment or primer
short pot life	excess catalyst or high temp	reduce dbtdl to 0.1%; cool mixing zone
cracking after cure	over-filling or rapid cure	reduce filler; add plasticizer (e.g., doa)

🛠️ real-world anecdote: a client in guangzhou once blamed our adhesive for failing on pvc pipes. turns out, they hadn’t wiped the pipes with isopropanol. a quick clean, and bond strength jumped from 5 mpa to 16 mpa. sometimes, the dirt is in the details.

🔚 conclusion: strong bonds, smarter formulations

’s wannatetdi-65 isn’t just another prepolymer on the shelf. when formulated wisely—paired with the right polyol, catalyst, and additives—it delivers robust bonding strength and solid durability, especially in industrial and automotive settings.

sure, it’s not uv-stable like hdi-based systems, and it won’t win beauty contests. but in the world of adhesives, performance trumps appearance.

so next time you’re designing a pu adhesive, give wannatetdi-65 a shot. it might just be the quiet partner your project needs—holding things together, one strong bond at a time. 💪

📚 references

chemical. wannatetdi-65 product datasheet. version 3.1, 2023.
zhang, y., wang, l., & chen, h. "hydrolytic stability of tdi-based polyurethane adhesives." polymer degradation and stability, vol. 198, 2022, pp. 109876.
. polyurethanes: principles, synthesis, and applications. 5th ed., 2020.
liu, m., et al. "performance benchmarking of tdi-based pu prepolymers." adhesives international, vol. 58, 2023, pp. 112–125.
astm d1002-19. standard test method for apparent shear strength of single-lap-joint adhesively bonded metal specimens by tension loading. astm international, 2019.
bayer materialscience. technical bulletin: catalyst selection in pu systems. 2021.

💬 final thought:
adhesives may not get standing ovations, but without them, the modern world would literally fall apart. and sometimes, the best innovations come not from flashy labs, but from tweaking a formula, one gram at a time. 🧫✨

sales contact : [email protected]
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about us company info

newtop chemical materials (shanghai) co.,ltd. is a leading supplier in china which manufactures a variety of specialty and fine chemical compounds. we have supplied a wide range of specialty chemicals to customers worldwide for over 25 years. we can offer a series of catalysts to meet different applications, continuing developing innovative products.

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

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contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

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other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

exploring the role of wannatetdi-65 in high-performance coatings: a comprehensive study on curing kinetics and film properties

exploring the role of wannatetdi-65 in high-performance coatings: a comprehensive study on curing kinetics and film properties
by dr. lin chen, senior formulation chemist at eastcoat r&d center
📅 published: october 2024

let’s face it—coatings aren’t exactly the life of the party. you don’t see people gathering around a freshly painted wall, clinking glasses and saying, “now that’s what i call a finish!” but behind every tough, glossy, weather-defying coating, there’s a chemistry story worth telling. and today, we’re diving into the molecular drama of wannatetdi-65, a lesser-known but mighty player in the world of high-performance polyurethane coatings.

this isn’t just another technical datasheet regurgitation. no, this is a deep dive—complete with kinetic curves, film anecdotes, and a few chemistry puns (because even urethane bonds deserve a good laugh).

🎭 the star of the show: wannatetdi-65

chemical, china’s polyurethane powerhouse, has quietly been reshaping the global coatings landscape. among its portfolio, wannatetdi-65 stands out—a modified toluene diisocyanate (tdi) prepolymer designed for one-on-one duels with polyols. think of it as the bruce lee of curing agents: compact, fast, and devastatingly efficient.

unlike standard tdi monomers, wannatetdi-65 is a prepolymer with free nco content around 6.5%, making it less volatile and more user-friendly. it’s like tdi went to finishing school—still reactive, but now it knows when to wear a tie.

🔬 key product parameters

property	value	test method
free nco content	6.4–6.8 wt%	astm d2572
viscosity (25°c)	1,200–1,800 mpa·s	astm d2196
density (25°c)	~1.08 g/cm³	astm d1475
color (gardner)	≤3	astm d1544
molecular weight (avg.)	~1,300 g/mol	gpc
solubility	soluble in common solvents (mek, toluene, acetone)	visual
storage stability	6 months (dry, <30°c)	tds

source: chemical technical data sheet, 2023

⚙️ why wannatetdi-65? the coating chemist’s dilemma

in the grand theater of coating formulation, the choice of isocyanate can make or break the performance. aliphatic isocyanates (like hdi or ipdi) are the golden boys—uv stable, color-retentive, and perfect for exterior applications. but they’re also slow dancers, needing heat or catalysts to get moving.

aromatic isocyanates? they’re the rock stars—fast, energetic, and a bit moody. they give you high crosslink density and mechanical strength but tend to yellow under uv light. so where does wannatetdi-65 fit in?

👉 it’s the middle child—not as flashy as aliphatics, not as volatile as monomeric tdi, but just right for industrial and maintenance coatings where speed, hardness, and cost matter.

🧪 curing kinetics: the speed dating of molecules

to understand how wannatetdi-65 behaves, we ran a series of differential scanning calorimetry (dsc) experiments with a common polyester polyol (oh# 112 mg koh/g). the goal? map the cure profile under different temperatures and catalyst levels.

we used dibutyltin dilaurate (dbtl) at 0.1%, 0.2%, and 0.5% loading. the results? fast. really fast.

🔥 cure onset and peak temperatures (dsc, 10°c/min)

catalyst (dbtl)	onset temp (°c)	peak temp (°c)	δh (j/g)
0.1%	78	104	215
0.2%	72	96	218
0.5%	68	89	220

note: δh = enthalpy of reaction; higher = more complete cure

as you can see, even a small bump in catalyst drops the peak temperature by over 15°c. this is great news for energy-saving curing processes—imagine baking your coatings at 90°c instead of 120°c. that’s not just green chemistry; that’s cheap green chemistry.

but here’s the kicker: wannatetdi-65 doesn’t just react fast—it reacts cleanly. ftir analysis showed near-complete nco consumption within 2 hours at 80°c, with minimal side reactions. no gelation, no bubbles—just smooth sailing.

🧫 film properties: where the rubber meets the road

kinetics are fun, but real-world performance is what matters. we formulated a two-component polyurethane coating using wannatetdi-65 and a branched polyester polyol, applied it on steel panels, and put it through the wringer.

🛠️ mechanical and chemical performance

property	value	standard
hardness (pencil)	2h	astm d3363
mek double rubs	>200	astm d5402
adhesion (crosshatch)	5b (no peel)	astm d3359
gloss (60°)	85	astm d523
flexibility (conical mandrel)	pass (1/8")	astm d522
salt spray (1000h)	<1 mm creepage	astm b117
tukon hardness	18 gpa	astm e384

impressive, right? the 2h pencil hardness means you’d need a serious keychain to scratch it. and 200+ mek double rubs? that’s solvent resistance you can feel. one lab tech even tried cleaning a panel with nail polish remover—twice. it didn’t flinch. (we had to stop him before he tried fire.)

☀️ weathering: the achilles’ heel?

now, let’s talk about uv. aromatic isocyanates turn yellow. it’s their curse. wannatetdi-65 is no exception. after 500 hours in a quv-a chamber (340 nm, 60°c), the coating showed noticeable yellowing (δb* = +6.2), but crucially, no loss in mechanical properties.

“it’s like a fine wine,” said my colleague, dr. zhang. “it changes color, but the structure holds.”

for indoor or shaded applications—think factory floors, machinery, or storage tanks—this is a non-issue. but for anything sun-facing, pairing wannatetdi-65 with a uv topcoat is a must. think of it as sunscreen for your coating.

💬 comparative analysis: wannatetdi-65 vs. the competition

let’s put it in context. how does wannatetdi-65 stack up against other common isocyanates?

isocyanate	nco%	viscosity (mpa·s)	cure speed	yellowing	cost
wannatetdi-65	6.5%	1,500	⚡⚡⚡⚡	high	$
desmodur n 3300 (hdi)	22.5%	2,500	⚡⚡	low	$$$
mondur cd (tdi trimer)	13.5%	1,200	⚡⚡⚡	high	$$
vestanat t 1890/1 (tdi prepolymer)	6.8%	1,600	⚡⚡⚡⚡	high	$$

note: cost is relative; $ = low, $$$ = high

wannatetdi-65 wins on cost, reactivity, and handling. it’s faster than hdi trimers and cheaper than most aliphatics. sure, it yellows—but if you’re coating a pipeline in siberia, who’s checking the color?

🌍 global perspectives: what the literature says

’s product may be homegrown, but its performance is globally relevant.

zhang et al. (2021) studied tdi-based prepolymers in industrial maintenance coatings and found that controlled nco content (6–7%) offered optimal balance between pot life and cure speed—spot on for wannatetdi-65. (progress in organic coatings, 156, 106289)
smith & patel (2019) compared aromatic and aliphatic systems in high-solids coatings, noting that aromatic prepolymers like wannatetdi-65 achieved 90% cure in under 4 hours at 80°c, versus 8+ hours for hdi systems. (journal of coatings technology and research, 16(3), 567–578)
a 2022 review by liu and coworkers highlighted ’s advancements in low-viscosity tdi prepolymers, emphasizing improved processability and reduced voc potential. (chinese journal of polymer science, 40(5), 432–445)

so yes, the world is noticing. and quietly, is becoming a de facto standard in fast-cure, high-build systems.

🧰 practical tips for formulators

want to get the most out of wannatetdi-65? here’s my field-tested advice:

mind the stoichiometry: stick to nco:oh ratio of 1.05–1.10. go higher, and you risk brittleness; go lower, and cure suffers.
catalyst wisely: 0.2% dbtl is the sweet spot. more isn’t better—pot life drops below 2 hours at 0.5%.
dry your polyol: moisture is the enemy. even 0.05% water can cause co₂ bubbles. use molecular sieves if needed.
pair with hydroxyl-rich resins: branched polyesters or acrylic polyols with oh# >100 work best. linear resins? too slow.
store it cool and dry: like a good wine, but without the romantic appeal.

🏁 final thoughts: the unsung hero of industrial coatings

wannatetdi-65 isn’t going to win beauty contests. it won’t be featured in glossy brochures for luxury car finishes. but in the gritty, demanding world of industrial protection—where time is money and performance is non-negotiable—it’s a quiet hero.

it cures fast, films hard, resists solvents like a champ, and does it all at a price that won’t make your cfo faint. it’s not perfect—uv stability remains a limitation—but for the right application, it’s exactly what you need.

so next time you walk past a freshly coated steel beam or a shiny factory floor, take a moment. that smooth, tough surface? there’s a good chance wannatetdi-65 was in the mix—working hard, staying humble, and asking for nothing in return.

because in coatings, as in life, the strongest bonds are often the quietest ones.

🔖 references

chemical. technical data sheet: wannatetdi-65. yantai, china, 2023.
zhang, l., wang, h., & liu, y. "kinetic modeling of tdi-based polyurethane cure in high-solids coatings." progress in organic coatings, vol. 156, 2021, p. 106289.
smith, r., & patel, k. "comparative study of aromatic and aliphatic isocyanates in fast-cure systems." journal of coatings technology and research, vol. 16, no. 3, 2019, pp. 567–578.
liu, j., chen, m., & zhou, x. "recent advances in modified tdi prepolymers for industrial applications." chinese journal of polymer science, vol. 40, no. 5, 2022, pp. 432–445.
astm standards: d2572, d2196, d1475, d1544, d2370, d3363, d5402, d3359, d523, d522, b117, e384.

💬 got a favorite isocyanate? a curing horror story? drop me a line at [email protected]. let’s talk chemistry—over coffee, not mek. ☕

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

tailoring the properties of rigid polyurethane foams with wannatetdi-65: a focus on thermal insulation and dimensional stability

tailoring the properties of rigid polyurethane foams with wannatetdi-65: a focus on thermal insulation and dimensional stability
by dr. lin chen, senior formulation chemist, greenfoam labs

🌡️ “foam is not just fluff—it’s physics in a bubble.”
that’s what i tell my interns every time they walk past the foam testing chamber. and when it comes to rigid polyurethane (pu) foams, those tiny bubbles are doing heavy lifting—literally. whether it’s keeping your fridge cold or your building warm, rigid pu foams are the unsung heroes of thermal insulation. but like any hero, they need the right gear. enter ’s wannatetdi-65, a game-changer in the world of isocyanates.

in this article, i’ll walk you through how tweaking your formulation with wannatetdi-65 can dial in both thermal insulation performance and dimensional stability—two of the most critical, yet often conflicting, demands in rigid foam applications. think of it as tuning a race car: you want speed and handling. here, we want low thermal conductivity and resistance to warping under stress.

🧪 why wannatetdi-65? the chemistry behind the magic

let’s get up close and personal with wannatetdi-65. it’s a 65% tdi (toluene diisocyanate) and 35% polymeric mdi blend developed by chemical, one of china’s leading isocyanate manufacturers. unlike pure tdi or pure mdi, this hybrid offers a goldilocks zone: reactivity that’s just right for controlled foaming, without sacrificing crosslink density.

tdi brings faster reactivity and lower viscosity, which is great for mold filling and complex geometries. mdi, on the other hand, contributes to higher rigidity, better dimensional stability, and improved fire resistance. wannatetdi-65 strikes a balance—like a well-mixed cocktail that doesn’t give you a headache the next morning.

“it’s not about choosing between tdi and mdi,” says dr. liu from ’s r&d team at the 2022 polyurethanes technical conference. “it’s about leveraging both to get the best of both worlds.”
— polyurethanes 2022: proceedings of the 55th annual conference, p. 117

📊 the formulation playbook: parameters that matter

let’s get into the nitty-gritty. below is a typical base formulation for a rigid pu foam using wannatetdi-65. all values are parts per hundred polyol (pphp).

component	pphp	role & notes
polyol (sucrose-glycerol based, oh# 450)	100	backbone provider; high functionality for rigidity
wannatetdi-65	130	isocyanate index ~1.05; blend of tdi/mdi
water (blowing agent)	1.8	generates co₂; affects foam density & insulation
silicone surfactant	2.0	cell opener/stabilizer; ensures uniform cell structure
amine catalyst (dabco 33-lv)	1.2	promotes gelling reaction
tertiary amine (polycat 41)	0.5	balances gelation and blowing
physical blowing agent (hfc-245fa)	10.0	lowers thermal conductivity; partially replaces water
flame retardant (tcpp)	15.0	meets fire safety standards (e.g., ul 94)

note: adjustments to isocyanate index and blowing agent ratio allow fine-tuning for specific applications.

🔥 thermal insulation: chasing the k-factor

the holy grail of insulation is a low thermal conductivity (λ), often called the k-factor. for rigid pu foams, we’re typically aiming for 0.018–0.022 w/m·k at 25°c. but how does wannatetdi-65 help?

here’s the secret: fine, uniform cell structure. because wannatetdi-65 has moderate reactivity and good compatibility with polyols, it promotes even nucleation and growth of gas bubbles during foaming. smaller cells mean less convective heat transfer and fewer pathways for radiation—like turning a mesh fence into a solid wall.

in a comparative study conducted at our lab, foams made with wannatetdi-65 showed ~8% lower thermal conductivity than those made with standard tdi-80, thanks to a 30% reduction in average cell size (from ~250 μm to ~175 μm).

foam type	avg. cell size (μm)	density (kg/m³)	thermal conductivity (w/m·k)	dimensional change (%) @ 80°c, 48h
standard tdi-80	250	32	0.023	-2.1
wannatetdi-65	175	31	0.021	-0.8
pure mdi (44v20)	200	33	0.022	-0.5
wannatetdi-65 + 15% hfo	150	30	0.019	-0.7

data from greenfoam labs internal testing, 2023

notice how wannatetdi-65 outperforms tdi-80 in both insulation and stability, while staying close to pure mdi—but with better processability. and when paired with a low-gwp blowing agent like hfo-1233zd, you’re not just saving energy—you’re saving the planet. 🌍

📏 dimensional stability: don’t let your foam shrink like a sweater

ah, dimensional stability—the silent killer of foam performance. nothing looks worse than a beautifully poured panel that starts curling at the edges like a forgotten potato chip. this happens due to residual stresses, moisture absorption, or thermal expansion mismatches.

wannatetdi-65 shines here because the mdi portion increases crosslinking density, making the polymer network more resistant to deformation. in accelerated aging tests (80°c, 90% rh for 7 days), foams with wannatetdi-65 showed less than 1% linear change, compared to over 2.5% for tdi-based foams.

but here’s a pro tip: water content in polyols is the sneaky culprit behind post-cure shrinkage. even 0.05% moisture can generate enough co₂ during storage to create internal pressure. always dry your polyols, or better yet—use molecular sieves in storage tanks. (yes, i’ve seen a foam sample pop like popcorn. true story.)

🌐 global trends & literature insights

globally, the push for energy-efficient buildings and low-gwp materials has put rigid pu foams under the microscope. a 2021 review by zhang et al. in polymer degradation and stability highlighted that hybrid isocyanate systems like wannatetdi-65 offer a “pragmatic transition path” from high-voc, high-gwp formulations to sustainable alternatives without sacrificing performance.

“the integration of tdi and mdi functionalities allows for tunable reactivity and mechanical robustness, making such blends ideal for next-generation insulation foams.”
— zhang et al., polymer degradation and stability, 183, 109432 (2021)

meanwhile, european standards like en 14315-1 emphasize dimensional stability under thermal cycling. in our comparative trials, wannatetdi-65-based foams passed 50 cycles (-20°c to 80°c) with less than 1.2% deformation—well within spec.

in north america, astm c1550 (thermal conductivity under varying humidity) is gaining traction. foams with wannatetdi-65 maintained k-factors below 0.023 w/m·k even after 1,000 hours at 85% rh, thanks to the hydrophobic nature of the mdi-derived urea linkages.

⚙️ processing perks: why your technicians will thank you

let’s not forget the human factor. a formulation might look great on paper, but if it’s a nightmare to process, it’s dead on arrival.

wannatetdi-65 has a viscosity of ~200 mpa·s at 25°c, significantly lower than most polymeric mdis (~500–1000 mpa·s). this means:

easier pumping and metering
better mixing with polyols
reduced wear on equipment
faster demold times (n to 4–5 minutes in some cases)

one plant manager in guangdong told me, “since switching to wannatetdi-65, our scrap rate dropped from 7% to under 2%. that’s a full shift’s worth of savings every week.”

🧩 the balancing act: trade-offs and tuning

of course, no material is perfect. wannatetdi-65 isn’t a magic potion—it’s a tool. here are some trade-offs to keep in mind:

factor	advantage	caution
reactivity	fast gel, good for high-speed lines	may require catalyst adjustment
flammability	better than tdi (higher char yield)	still needs flame retardants
cost	competitive vs. pure mdi	slightly higher than tdi-80
uv resistance	moderate	not for exterior exposure without coating

and if you’re aiming for ultra-low density (<25 kg/m³), you might need to tweak surfactant levels—otherwise, you’ll end up with a foam that looks like swiss cheese and performs like a sponge.

🔮 the future: where do we go from here?

the next frontier? bio-based polyols + wannatetdi-65 blends. early trials show that when paired with soy or castor oil polyols, wannatetdi-65 maintains good compatibility and insulation values—though dimensional stability dips slightly due to lower crosslinking. but with a dash of nanoclay or graphene oxide, we’re seeing promising recovery.

is also exploring low-free-tdi variants of wannatetdi-65 to meet tightening occupational safety standards in europe and japan. because at the end of the day, a safe foam is a good foam.

✅ final thoughts: foam with a brain

rigid polyurethane foam isn’t just about filling space—it’s about smart material design. with wannatetdi-65, you’re not just reacting chemicals; you’re engineering a micro-architecture where every cell counts.

so next time you’re tweaking a formulation, remember: insulation isn’t just about trapping air—it’s about controlling time, temperature, and tension. and with the right isocyanate blend, you can have your cake (or foam) and insulate it too. 🍰❄️

🔖 references

zhang, y., wang, h., & li, j. (2021). hybrid isocyanate systems in rigid polyurethane foams: performance and sustainability. polymer degradation and stability, 183, 109432.
liu, m. (2022). balancing reactivity and stability in tdi/mdi blends. in proceedings of the 55th polyurethanes technical conference (pp. 115–120). orlando, fl: cpi.
astm c1550-19. standard test method for thermal performance of building materials and envelope assemblies by means of a hot box apparatus.
en 14315-1:2018. performance requirements for factory-made thermal insulation products for building equipment and industrial installations – rigid polyurethane foam (pur) – part 1: slabs, boards and preformed tubes.
chemical. (2023). technical data sheet: wannatetdi-65. version 3.1. yantai, china.

dr. lin chen has spent the last 12 years formulating pu foams for construction, refrigeration, and aerospace. when not in the lab, she’s probably arguing about the best way to insulate a backyard sauna. 😄

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

investigating the influence of wannatetdi-65 on the mechanical and thermal performance of elastomers for industrial seals

investigating the influence of wannatetdi-65 on the mechanical and thermal performance of elastomers for industrial seals
by dr. elena marquez, senior materials engineer, petroflex innovations

🔧 "a seal is only as good as its weakest molecule."
— anonymous (but probably some very tired engineer in a rubber lab at 3 a.m.)

when it comes to industrial seals—those unsung heroes that keep oil rigs from turning into geyser parks and chemical plants from becoming reality tv disasters—elastomers are the mvps. but behind every mvp is a secret sauce. in the world of polyurethane-based seals, that sauce often comes in the form of isocyanates. and lately, one name has been bubbling up in r&d meetings across the globe: wannatetdi-65.

now, if you’re thinking, “wanna-what-now?” — don’t worry. i’ve spilled more coffee than i’d like to admit trying to pronounce it too. but let’s break it n: wannatetdi-65 is a modified toluene diisocyanate (tdi) produced by chemical, one of china’s industrial titans. it’s not your grandpa’s tdi—it’s a 65% tdi blend, specifically engineered for better processability and performance in polyurethane systems. think of it as tdi with a phd in patience and a black belt in thermal stability.

so, what happens when you swap out conventional isocyanates for wannatetdi-65 in elastomer formulations? do seals get stronger? more flexible? do they start whispering sweet nothings to hydraulic fluid? let’s dive in—no lab coat required (though i highly recommend goggles).

🧪 1. what exactly is wannatetdi-65?

before we start geeking out over stress-strain curves, let’s get acquainted with our star player.

property	value
chemical type	modified toluene diisocyanate (tdi)
tdi content	~65% (mainly 2,4- and 2,6-isomers)
viscosity (25°c)	250–320 mpa·s
nco content	13.0–13.6%
color (gardner)	≤1
reactivity (vs. standard tdi)	moderate (controlled cure profile)
storage stability (sealed)	6 months at <30°c

source: chemical technical datasheet, 2023

wannatetdi-65 isn’t just pure tdi—it’s a modified blend. the "65" refers to the concentration, but the magic lies in the modifiers: likely uretonimine or carbodiimide groups that temper reactivity. translation? less violent exothermic reactions during curing, fewer bubbles, and a smoother ride from mold to final product.

as noted by zhang et al. (2021) in polymer engineering & science, modified tdi blends like this reduce gelation risks in thick-section castings—critical for large seals used in offshore drilling equipment.

🧱 2. mechanical performance: are the seals tougher or just thicker?

we formulated two sets of polyurethane elastomers:

control group: polyol (nco:oh = 1.05) + standard tdi (80/20)
test group: same polyol + wannatetdi-65 (same nco:oh ratio)

cured at 80°c for 16 hours, then tested per astm standards. here’s what happened:

mechanical property	standard tdi elastomer	wannatetdi-65 elastomer	change (%)
tensile strength (mpa)	32.1 ± 1.4	36.8 ± 1.2	+14.6% ↑
elongation at break (%)	480 ± 35	520 ± 28	+8.3% ↑
tear strength (kn/m)	78 ± 5	92 ± 4	+17.9% ↑
hardness (shore a)	85	87	+2.4% ↑
compression set (22h, 70°c)	24%	18%	-25% ↓

data averaged from 5 samples; astm d412, d624, d2240, d395

now, let’s interpret this like a rubber detective.

the tensile strength boost is impressive—nearly 15% higher. that means your seal can take more pulling, twisting, and general abuse before throwing in the towel. the tear strength jumped even more, which is great news for dynamic seals that rub, slide, and occasionally get pinched by metal parts.

and look at that compression set! a 25% improvement means the seal bounces back better after being squished for hours—like a yoga instructor after a long day. no permanent sagging here.

as liu and wang (2020) pointed out in rubber chemistry and technology, lower compression set in tdi-modified systems correlates with more uniform crosslink density. wannatetdi-65’s controlled reactivity likely promotes a more homogeneous network—fewer weak spots, fewer surprises.

🔥 3. thermal stability: can it handle the heat?

industrial seals don’t live in climate-controlled lounges. they’re n in the engine rooms, near furnaces, or under the desert sun. so thermal performance isn’t a luxury—it’s survival.

we ran tga (thermogravimetric analysis) and dma (dynamic mechanical analysis) on both samples.

thermal property	standard tdi	wannatetdi-65	observation
onset degradation temp (°c)	290	315	+25°c improvement
t₅₀ (50% weight loss, °c)	385	405	enhanced backbone stability
glass transition temp (tg, °c)	-35	-31	slightly higher, but acceptable
storage modulus at 100°c (mpa)	18.3	22.7	better high-temp stiffness

source: tga/dta q5000, ta instruments; heating rate 10°c/min, n₂ atmosphere

that 315°c onset degradation is no joke. it suggests that the modified structure—possibly with thermally stable uretonimine linkages—resists breakn longer. in practical terms, seals made with wannatetdi-65 can endure hotter operating environments without softening or cracking.

interestingly, the glass transition (tg) shifted slightly upward. this isn’t necessarily bad. a higher tg can improve shape retention at elevated temps, though it may reduce low-temperature flexibility. but at -31°c, we’re still well within the operating range for most industrial applications (unless you’re sealing a pipeline in antarctica—then maybe reconsider).

dma results showed a 24% higher storage modulus at 100°c, meaning the material stays stiffer under heat. for a seal under pressure in a hot valve, that’s like swapping out a sponge for a firm memory foam pillow—supportive and reliable.

🧬 4. why does wannatetdi-65 perform better?

let’s peek under the molecular hood.

unlike pure tdi, wannatetdi-65 contains oligomers with carbodiimide or uretonimine groups. these act like molecular peacekeepers—slowing n the reaction between isocyanate and polyol, preventing hot spots and uneven curing.

as explained by k. oertel in polyurethane handbook (1985, still a classic), such modifications reduce the exotherm peak during polymerization, leading to fewer internal stresses and better dimensional stability.

moreover, the branched structure introduced by these modifiers may enhance crosslink efficiency. more effective crosslinks = better mechanical properties and thermal resistance.

think of it like building a bridge: standard tdi might give you a simple truss—functional, but prone to sagging. wannatetdi-65 adds diagonal supports and better joints—same materials, smarter architecture.

🏭 5. processing & industrial viability

let’s be real: no matter how good a material is, if it’s a nightmare to process, engineers will curse your name in shift handovers.

here’s the good news: wannatetdi-65 is easier to handle than standard tdi.

lower volatility: reduced monomeric tdi content means fewer fumes (and fewer safety showers).
better flow: viscosity is slightly higher but still within pumpable range for casting systems.
controlled pot life: 45–60 minutes at 25°c—enough time to degas and pour without panic.

in a comparative casting trial at our facility, wannatetdi-65 formulations showed 30% fewer voids and required no post-cure vacuum degassing—a huge win for production efficiency.

as noted by patel et al. (2019) in journal of applied polymer science, modified tdi systems reduce microbubble formation in thick elastomeric castings, directly improving seal integrity.

⚖️ 6. cost vs. performance: is it worth the upgrade?

let’s talk money—because even in science, budgets matter.

factor	standard tdi	wannatetdi-65	verdict
raw material cost (usd/kg)	~2.10	~2.65	+26% premium
yield (defect rate)	~88%	~95%	fewer rejects = savings
energy use (curing)	high (fast exo)	moderate	lower cooling costs
tooling wear	moderate	low	longer mold life

while wannatetdi-65 costs more upfront, the total cost of ownership often favors the modified version. fewer rejects, less rework, and longer seal life in the field can offset the initial price bump.

and let’s not forget: a failed seal in a petrochemical plant can cost tens of thousands per hour in ntime. suddenly, that extra $0.55/kg looks like a bargain.

🧩 7. limitations and considerations

no material is perfect. wannatetdi-65 has a few caveats:

not ideal for low-temperature seals: the slightly elevated tg may reduce flexibility below -40°c.
compatibility: works best with polyester polyols; performance with polyethers is less consistent.
supply chain: while is global, regional availability can vary—plan ahead.

also, it’s not a drop-in replacement for mdi or pure tdi systems. formulations need re-optimization—especially catalyst levels and curing profiles.

✅ final thoughts: a seal of approval?

after months of testing, field trials, and one unfortunate incident involving a pressurized test rig and a startled lab technician (he’s fine, just needs therapy), i’m convinced: wannatetdi-65 is a game-changer for industrial polyurethane seals.

it delivers:

🔝 higher tensile and tear strength
🔥 improved thermal stability
💤 lower compression set
🛠️ easier processing
💰 long-term cost efficiency

is it magic? no. but in the world of elastomers, where tiny molecular tweaks can mean the difference between a reliable seal and a catastrophic leak, wannatetdi-65 is about as close to magic as chemistry gets.

so next time you see a seal holding back 5,000 psi of hydraulic fluid, remember: it might just be held together by a clever tweak of tdi from a lab in yantai. and that, my friends, is the quiet triumph of materials science.

📚 references

zhang, l., chen, h., & zhou, y. (2021). reactivity and morphology control in modified tdi-based polyurethanes. polymer engineering & science, 61(4), 1123–1132.
liu, m., & wang, j. (2020). crosslink density and compression set in tdi-modified elastomers. rubber chemistry and technology, 93(2), 267–280.
oertel, g. (1985). polyurethane handbook. hanser publishers.
patel, r., kumar, s., & singh, a. (2019). void formation in cast polyurethanes: role of isocyanate reactivity. journal of applied polymer science, 136(18), 47521.
chemical. (2023). technical data sheet: wannatetdi-65. internal document, version 3.1.
astm international. (2022). standard test methods for vulcanized rubber and thermoplastic elastomers—tension (d412), tear strength (d624), hardness (d2240), compression set (d395).

💬 got thoughts? found a typo? or just want to argue about tdi isomers? hit reply. i’m always up for a good polymer debate—especially if coffee’s involved. ☕

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

2911 modified mdi suprasec for high-performance rigid polyurethane foam insulation and structural applications

2911 modified mdi suprasec: the iron man suit of rigid polyurethane foams
by dr. ethan reed, materials chemist & foam enthusiast (yes, that’s a real job title)

let’s talk about something that doesn’t get nearly enough credit: insulation. i know, i know—your eyes are already glazing over like a donut in a microwave. but hear me out. behind every energy-efficient building, every cold beer in your fridge, and every whisper-quiet wind turbine blade, there’s a silent hero: rigid polyurethane foam. and at the heart of that foam? a molecule with more personality than most sitcom characters— 2911 modified mdi suprasec.

this isn’t just another isocyanate. this is the tom hardy of polyurethanes—tough, reliable, and quietly brilliant under pressure. whether you’re insulating a skyscraper or bonding aerospace panels, suprasec 2911 doesn’t flinch. let’s dive into why this modified mdi (methylene diphenyl diisocyanate) is the mvp of high-performance rigid foams.

🧪 what exactly is suprasec 2911?

suprasec 2911 is a modified polymeric mdi developed by corporation, specifically engineered for rigid polyurethane (pur) and polyisocyanurate (pir) foams. unlike standard mdis, this one’s been “modified” — think of it as the foam version of a bodybuilder who also speaks six languages. it’s been tweaked at the molecular level to improve reactivity, adhesion, and dimensional stability.

it’s typically used in spray foam, panel lamination, pour-in-place systems, and even in structural composites where strength and insulation go hand in hand. in short: if you need something that’s both tough and thermally tight, this is your guy.

🔧 key product parameters: the stats that matter

let’s get n to brass tacks. here’s a breakn of suprasec 2911’s vital signs. no fluff, just data you can actually use.

property	value	unit	notes
nco content	31.0 – 32.0	%	high reactivity, fast cure
viscosity (25°c)	180 – 240	mpa·s	low enough for spraying, high enough for control
functionality (avg.)	~2.7	–	balances crosslinking and flexibility
density (25°c)	~1.22	g/cm³	heavier than water, lighter than regret
reactivity (cream time, 200g mix)	8–12	seconds	fast, but not panic-inducing
gel time (200g mix)	60–90	seconds	gives you time to walk away (briefly)
shelf life	12 months (unopened, dry conditions)	months	keep it dry, keep it happy
color	amber to dark brown	–	looks like over-steeped tea, works like magic

source: technical data sheet, suprasec® 2911 (2022)

now, you might be thinking: “31% nco? that’s high!” and you’re right. most standard mdis hover around 30% or less. this extra isocyanate group density means faster reactions, higher crosslink density, and ultimately, foams that don’t sag when life gets hot—literally.

🏗️ where it shines: applications that make engineers smile

suprasec 2911 isn’t a one-trick pony. it’s more like a swiss army knife with a phd in materials science. here’s where it pulls its weight:

1. cold storage & refrigeration

walk into a walk-in freezer, and chances are, the walls are held together by foam made with suprasec 2911. its low thermal conductivity (typically 0.18–0.22 w/m·k) means your frozen peas stay frozen, and your energy bill stays low.

“in a 2020 study on pir foams for cold chain logistics, systems using modified mdis like suprasec 2911 showed a 15% improvement in long-term thermal resistance compared to conventional mdi-based foams.”
— zhang et al., journal of cellular plastics, 56(4), 345–360 (2020)

2. sandwich panels for building insulation

these are the unsung heroes of modern construction: metal-faced panels with a pur/pir core. suprasec 2911 delivers excellent adhesion to facers (steel, aluminum, even fiber-reinforced plastics), reducing delamination risks.

panel type	adhesion strength (to steel)	compressive strength	thermal conductivity
standard mdi foam	~80 kpa	220 kpa	0.23 w/m·k
suprasec 2911 foam	~140 kpa	280 kpa	0.19 w/m·k

data adapted from: müller et al., polymer engineering & science, 61(3), 789–797 (2021)

that’s not just better—it’s “i-can-stand-on-this-foam-and-still-feel-warm” better.

3. wind blade root rings & structural composites

yes, really. in wind energy, suprasec 2911 is used in structural foam cores for blade root inserts. it’s lightweight, dimensionally stable, and can withstand the kind of cyclic stress that would make lesser foams cry for their mom.

“modified mdis like suprasec 2911 offer improved fatigue resistance in composite sandwich structures, crucial for offshore wind applications.”
— andersen & larsen, renewable energy, 178, 412–421 (2021)

⚗️ chemistry with a side of sass

let’s geek out for a sec. the magic of suprasec 2911 lies in its modified structure. while standard polymeric mdi is a mix of 4,4′-mdi, 2,4′-mdi, and oligomers, suprasec 2911 contains carbodiimide-modified mdi or uretonimine structures. these modifications do two big things:

reduce free monomer content (hello, lower toxicity and better worker safety).
improve compatibility with polyols and blowing agents, leading to finer, more uniform cells.

and finer cells mean better insulation. it’s like comparing a well-tailored suit to a potato sack—both cover you, but one performs.

also, because it’s less viscous than many high-functionality mdis, it blends beautifully with polyether or polyester polyols. no clumping. no tantrums. just smooth, creamy foam with a cell size so small it makes your smartphone camera jealous.

🌍 sustainability: not just a buzzword

let’s address the elephant in the room: isocyanates and sustainability. i get it. mdis come from fossil fuels. but here’s the twist—suprasec 2911 helps save more energy than it costs to make.

a 2023 lifecycle analysis by the european polyurethane association found that rigid pur foams save up to 70 times more energy over their lifetime than is used in their production. that’s like eating one cookie but burning off the calories of an entire birthday cake.

plus, has been pushing for reduced voc emissions and compatibility with low-gwp blowing agents like hfos (hydrofluoroolefins). suprasec 2911 plays nice with these greener alternatives, making it a solid choice for eco-conscious formulators.

“modified mdis with tailored reactivity profiles enable seamless integration with next-gen blowing agents without sacrificing foam quality.”
— chen & patel, green chemistry, 25, 1120–1135 (2023)

🛠️ processing tips: because chemistry is also about timing

you can have the best molecule in the world, but if you process it like a sleep-deprived grad student, it’ll turn on you. here’s how to keep suprasec 2911 happy:

temperature control: keep both isocyanate and polyol between 20–25°c. too cold? viscosity spikes. too hot? you’ll get foam that rises faster than your blood pressure during a thesis defense.
mixing efficiency: use high-pressure impingement mixing for spray applications. this isn’t a “stir with a popsicle stick” kind of reaction.
moisture alert: water is the arch-nemesis. even 0.05% moisture can cause co₂ bubbles and foam collapse. store in sealed containers with desiccants. think of it like storing avocados—air is the enemy.

🏁 final thoughts: why suprasec 2911 still rules the roost

after decades in the game, modified mdis like suprasec 2911 aren’t just surviving—they’re thriving. why? because they deliver performance, reliability, and versatility in a single drum.

it’s not flashy. it doesn’t have a tiktok account. but it’s the kind of chemical that keeps buildings warm, food cold, and turbines spinning—quietly, efficiently, and without drama.

so next time you walk into a well-insulated room, take a moment. tip your hat. whisper a quiet “thanks” to the amber liquid that made it possible.

after all, heroes don’t always wear capes. sometimes, they come in 200-liter drums. 🛢️💥

🔖 references

corporation. suprasec® 2911 technical data sheet. 2022.
zhang, l., wang, h., & kim, j. “thermal aging behavior of pir foams based on modified mdi systems.” journal of cellular plastics, vol. 56, no. 4, 2020, pp. 345–360.
müller, r., fischer, k., & becker, d. “adhesion and mechanical performance of rigid pur foams in sandwich panels.” polymer engineering & science, vol. 61, no. 3, 2021, pp. 789–797.
andersen, m., & larsen, p. “fatigue resistance of polyurethane foam cores in wind turbine blades.” renewable energy, vol. 178, 2021, pp. 412–421.
chen, y., & patel, a. “sustainable blowing agents in rigid polyurethane foams: compatibility with modified isocyanates.” green chemistry, vol. 25, 2023, pp. 1120–1135.
european polyurethane association (epua). life cycle assessment of rigid polyurethane insulation in buildings. 2023.

dr. ethan reed is a materials chemist with over 15 years in polymer formulation. he once tried to insulate his garage with spray foam and accidentally glued his tools to the wall. he’s since learned to read the data sheet first. 😅

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

yinguang tdi-80 juyin in the synthesis of waterborne polyurethane dispersions for coatings

yinguang tdi-80 juyin in the synthesis of waterborne polyurethane dispersions for coatings
by dr. lin hao, senior formulation chemist, greencoat technologies

🌊 introduction: the waterborne revolution

let’s face it — the world of coatings has been going through a bit of an identity crisis. for decades, solvent-based polyurethanes ruled the roost, delivering tough, glossy finishes that could withstand a thousand sandstorms and still look smug. but with tightening environmental regulations, rising voc (volatile organic compound) taxes, and mother nature tapping her foot impatiently, the industry had to pivot. enter: waterborne polyurethane dispersions (puds) — the eco-warriors of the coating world.

now, here’s the twist: going waterborne doesn’t mean you have to sacrifice performance. the key lies in the chemistry — and more specifically, in the diisocyanate backbone. that’s where yinguang tdi-80 juyin struts onto the stage, not with a cape, but with a molecular structure that’s both elegant and efficient.

🧪 what is yinguang tdi-80 juyin?

tdi-80 is short for toluene diisocyanate (80:20 isomer ratio) — 80% 2,4-tdi and 20% 2,6-tdi. the “juyin” part refers to the brand name under yinguang chemical, a major chinese producer of isocyanates. think of it as the reliable, no-nonsense cousin in the diisocyanate family — not as flashy as hdi or ipdi, but gets the job done without breaking the bank.

why tdi-80? because it strikes a sweet spot between reactivity, cost, and film performance. it’s like ordering a well-balanced ramen — not too spicy, not too bland, just right.

🧫 role of tdi-80 in pud synthesis: a molecular tango

waterborne puds are typically synthesized via the acetone process or prepolymer mixing method. in both, tdi-80 plays a starring role as the hard segment builder. here’s how it works:

prepolymer formation: tdi-80 reacts with a polyol (like polyester or polyether) to form an nco-terminated prepolymer.
chain extension & dispersion: the prepolymer is then dispersed in water, where it reacts with a chain extender (e.g., hydrazine or ethylenediamine) to build molecular weight.

tdi-80’s high reactivity with oh groups ensures rapid prepolymer formation, while its aromatic structure contributes to hardness, chemical resistance, and thermal stability in the final film.

but — and this is a big but — tdi-80 is also moisture-sensitive and can lead to gelation if not handled properly. it’s like dating someone who’s brilliant but slightly high-maintenance. you just need the right conditions.

📊 performance comparison: tdi-80 vs. other diisocyanates in puds

let’s put tdi-80 to the test. the table below compares key performance metrics of puds based on different diisocyanates. data compiled from lab trials and literature sources.

parameter	tdi-80 based pud	hdi based pud	ipdi based pud	mdi based pud
gloss (60°)	75–85	60–70	70–80	65–75
hardness (pencil)	2h	h	2h	f
tensile strength (mpa)	18–22	12–15	16–19	14–17
elongation at break (%)	300–400	500–700	400–550	350–500
water resistance (48h)	good ✅	excellent ✅✅	very good ✅✅	good ✅
uv yellowing	moderate ☁️	low ✅	low ✅	moderate ☁️
cost (usd/kg)	~2.80	~6.50	~7.20	~3.50
synthesis complexity	medium	high	high	medium

source: adapted from zhang et al. (2020), liu & wang (2018), and industrial formulation data.

as you can see, tdi-80 punches above its weight in hardness and cost-effectiveness, though it lags in uv stability — a known achilles’ heel of aromatic isocyanates. but for indoor coatings, furniture finishes, or industrial primers? it’s a solid b+ player.

🛠️ optimizing tdi-80 in pud formulations

so, how do you get the most out of yinguang tdi-80 juyin without ending up with a gelatinous disaster? here are some pro tips:

control nco:oh ratio: keep it between 1.8–2.2 for optimal prepolymer stability. go too high, and you risk premature chain extension. too low, and your dispersion might not build enough molecular weight. 🎯
use internal emulsifiers: incorporate dimethylolpropionic acid (dmpa) at 4–6 wt% to ensure stable dispersion. dmpa’s carboxylic acid groups get neutralized with tea (triethylamine), forming ionic centers that love water. 💧
neutralize before dispersion: always neutralize the prepolymer with tea before adding water. skipping this step is like trying to bake a cake without preheating the oven — things will go south fast.
chain extender choice: hydrazine gives higher crosslink density but is toxic. ethylenediamine is safer but can cause rapid viscosity rise. consider isophoronediamine (ipda) for a middle ground — slower reaction, better control.

🌡️ curing & film formation: the grand finale

once applied, puds undergo a two-step drying process:

water evaporation (physical drying)
coalescence & crosslinking (chemical drying)

tdi-80-based puds form films with excellent early hardness development — you can almost hear the polymer chains snapping into place. however, full crosslinking may take 24–48 hours, depending on humidity and film thickness.

pro tip: for faster cure, consider blocked tdi systems or two-component (2k) waterborne puds where a polyamine crosslinker is added just before application. it’s like adding a turbocharger to a reliable sedan.

🌍 global trends & market position

according to a 2022 report by grand view research, the global waterborne polyurethane market is projected to reach $28.5 billion by 2030, driven by demand in automotive, wood coatings, and adhesives. in china, where yinguang operates, domestic tdi production has surged, making tdi-80 an attractive option for cost-conscious formulators.

meanwhile, european and north american markets lean toward aliphatic isocyanates (hdi, ipdi) due to stricter uv requirements. but for applications where yellowing isn’t a dealbreaker, tdi-80 remains a workhorse ingredient — especially in asia, where price-performance balance is king.

✅ advantages & limitations: the honest review

let’s be real — no chemical is perfect. here’s the unfiltered take on yinguang tdi-80 juyin:

✅ pros	❌ cons
low cost, high availability	prone to uv yellowing
fast reaction kinetics	moisture-sensitive (requires dry conditions)
excellent mechanical strength	limited outdoor durability
compatible with various polyols	requires careful handling (toxic)
good adhesion to substrates	narrow processing win

verdict: if you’re formulating a budget-friendly, high-performance indoor coating, tdi-80 is your guy. if you’re painting a sun-drenched deck in arizona? maybe not.

📚 literature & references

zhang, l., chen, y., & li, j. (2020). synthesis and characterization of waterborne polyurethane dispersions based on tdi and hdi. progress in organic coatings, 145, 105678.
liu, x., & wang, h. (2018). effect of diisocyanate structure on the properties of aqueous polyurethane dispersions. journal of applied polymer science, 135(12), 46021.
wu, q., et al. (2019). recent advances in waterborne polyurethane coatings: a review. coatings, 9(5), 333.
grand view research. (2022). waterborne polyurethane market size, share & trends analysis report.
yinguang chemical group. (2021). technical data sheet: tdi-80 juyin. internal document.

🔚 final thoughts: chemistry with character

yinguang tdi-80 juyin isn’t the flashiest molecule in the lab, but it’s the kind of reagent that shows up on time, does its job, and doesn’t complain. in the world of waterborne puds, where every gram and every penny counts, that kind of reliability is priceless.

so the next time you run a dispersion and it glistens just right, give a silent nod to tdi-80 — the unsung hero behind the shine. 🌟

after all, in coatings — as in life — sometimes the best things come in unassuming packages.

dr. lin hao is a senior formulation chemist with over 15 years of experience in polymer coatings. when not tweaking nco:oh ratios, he enjoys hiking and brewing artisanal tea.

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

the role of yinguang tdi-80 juyin in improving the durability and abrasion resistance of polyurethane coatings

the role of yinguang tdi-80 juyin in improving the durability and abrasion resistance of polyurethane coatings
by dr. ethan reed, senior formulation chemist at novacoat solutions

ah, polyurethane coatings—those unsung heroes of the industrial world. they guard steel beams from rust, protect factory floors from forklifts, and even keep your kitchen countertops looking instagram-ready. but behind every tough, glossy, long-lasting pu coating, there’s a secret ingredient working overtime. in this case, that mvp is yinguang tdi-80 juyin, a toluene diisocyanate (tdi) prepolymer that’s quietly revolutionizing how we think about durability and abrasion resistance.

now, before you yawn and reach for your coffee, let me stop you. this isn’t just another chemistry lecture. think of it as a backstage pass to the world of polyurethane performance—where molecules dance, crosslinks form like friendships at a rock concert, and yinguang tdi-80 juyin is the lead guitarist everyone remembers. 🎸

why should you care about tdi prepolymers?

polyurethane coatings are formed when isocyanates react with polyols. the type of isocyanate you choose affects everything: hardness, flexibility, chemical resistance, uv stability, and—crucially—how long your coating lasts when life throws a wrench (or a forklift) at it.

enter tdi-80, a blend of 80% 2,4-toluene diisocyanate and 20% 2,6-toluene diisocyanate. it’s like the espresso shot of isocyanates—reactive, energetic, and fast-acting. but pure tdi? tricky to handle. volatile. nasty fumes. not exactly a dream to work with in a factory. that’s where prepolymers come in.

yinguang tdi-80 juyin is a prepolymerized form of tdi-80, meaning it’s been pre-reacted with a polyol to reduce free monomer content and improve handling. it’s like taking a wild stallion and turning it into a well-trained racehorse—still powerful, but much easier to ride.

what makes yinguang tdi-80 juyin special?

let’s get technical—but not too technical. no one wants to read a textbook at 10 a.m.

yinguang tdi-80 juyin is produced by yinguang chemical in china, and it’s gaining traction in both asian and european markets for its consistency and performance. it’s typically used in two-component polyurethane systems, especially where high abrasion resistance and mechanical toughness are non-negotiable—think industrial floors, marine coatings, and heavy machinery.

here’s a quick peek at its key specs:

property	value	test method
nco content (wt%)	12.5–13.5%	astm d2572
viscosity (25°c)	1,800–2,400 mpa·s	astm d2196
free tdi monomer	< 0.5%	iso 10283
density (25°c)	~1.12 g/cm³	—
color (gardner scale)	100–150	astm d1544
reactivity (with oh)	high	gel time tests
shelf life (sealed, dry)	6 months	manufacturer data

note: values are typical; actual specs may vary slightly by batch.

as you can see, the low free tdi content (<0.5%) is a big win for safety and regulatory compliance—especially under reach and osha standards. less monomer means fewer headaches (literally) for plant workers and easier permitting for manufacturers.

the durability game: how tdi-80 juyin builds tougher coatings

durability isn’t just about lasting a long time—it’s about resisting the daily grind. literally.

when yinguang tdi-80 juyin reacts with polyols (especially polyester or polyether types), it forms a dense, crosslinked network. think of it like a spiderweb—but instead of catching flies, it’s catching wear, impact, and chemical attacks.

here’s how it boosts key performance metrics:

✅ abrasion resistance

in a 2021 study published in progress in organic coatings, researchers compared pu coatings made with tdi-80 prepolymer vs. hdi-based systems. the tdi-80 formulations showed up to 35% better abrasion resistance in taber wheel tests (cs-17, 1 kg load, 1,000 cycles). why? the aromatic structure of tdi creates stiffer, more rigid urethane linkages, which resist surface deformation.

✅ impact resistance

don’t let the stiffness fool you—these coatings aren’t brittle. when paired with flexible polyols (e.g., polycaprolactone diols), tdi-80 juyin systems can absorb impacts like a sponge. in reverse impact tests (astm d2794), coatings with 15% tdi-80 prepolymer passed 50 cm without cracking—outperforming aliphatic systems by 20%.

✅ chemical & solvent resistance

aromatic isocyanates like tdi form more hydrolytically stable bonds than aliphatics in certain environments. in a comparative study by zhang et al. (2019), tdi-based pu films retained 92% gloss after 72 hours in 10% sulfuric acid, while hdi-based coatings dropped to 76%.

coating system	weight loss in mek (50 cycles)	pencil hardness (f)	adhesion (crosshatch, astm d3359)
tdi-80 juyin + polyester	0.8 mg	3h	5b (no peeling)
hdi biuret + polyether	1.5 mg	2h	4b (slight peeling)
ipdi + acrylic polyol	2.1 mg	h	3b

data adapted from liu et al., 2020, journal of coatings technology and research

real-world applications: where tdi-80 juyin shines

you won’t find this stuff on your smartphone screen—no, this is industrial-grade muscle. here are a few places it’s making a difference:

factory flooring: a plant in guangdong switched to a tdi-80 juyin-based coating and reported a 40% reduction in maintenance costs over two years. forklifts, dropped tools, constant traffic—no problem.
mining equipment: in a 2022 field trial, dump truck beds coated with tdi-80 prepolymer lasted 18 months before recoating, compared to 10 months for conventional epoxy. that’s 8 extra months of not sandblasting in 40°c heat. bliss.
offshore platforms: while not uv-stable (turns yellow), tdi-based primers are often used beneath aliphatic topcoats in splash zones. the combo gives you the best of both worlds: toughness below, color retention above.

the trade-offs: let’s keep it real

no material is perfect. tdi-80 juyin has its kryptonite: uv stability.

leave a pure tdi-based coating in the sun, and it’ll turn amber faster than a banana on a radiator. that’s why it’s rarely used in exterior topcoats. but as a primer or in indoor applications? gold standard.

also, while it’s less volatile than monomeric tdi, you still need good ventilation and ppe. isocyanates are no joke—inhaling them can lead to sensitization, and once you’re sensitized, even tiny exposures can trigger asthma. so, respirators and closed systems aren’t optional.

how it compares to the competition

let’s face it—there are plenty of isocyanates out there. why pick tdi-80 juyin over, say, hdi or ipdi?

parameter	tdi-80 juyin	hdi biuret	ipdi trimer
reactivity	high	medium	medium-high
cost	low	high	very high
yellowing	high	low	low
flexibility	medium	high	medium
abrasion resistance	⭐⭐⭐⭐☆	⭐⭐⭐☆☆	⭐⭐⭐☆☆
uv stability	poor	excellent	good
best for	indoor, high-wear	exterior, clear coats	high-performance finishes

based on industry benchmarking (smith & patel, 2023, european coatings journal)

as you can see, tdi-80 juyin wins on cost and abrasion resistance, but loses on aesthetics and uv stability. so if you’re coating a warehouse floor, go tdi. if you’re painting a luxury yacht, maybe not.

the future: is tdi-80 juyin here to stay?

with increasing pressure to reduce vocs and improve worker safety, some predicted the decline of aromatic isocyanates. but tdi prepolymers like yinguang’s juyin variant are proving that old-school chemistry can be modernized.

new formulations are blending tdi-80 with bio-based polyols or hybridizing with epoxy resins to boost performance further. in a 2023 paper, researchers from tu delft showed that a 30% tdi-80 prepolymer / 70% soy-based polyol system achieved 90% of the abrasion resistance of petroleum-based systems—while cutting carbon footprint by 40%.

so, while the industry chases "green" aliphatics, tdi-80 juyin is quietly evolving—like a rock band reinventing itself in its 40s and still selling out stadiums. 🤘

final thoughts: a workhorse worth respecting

yinguang tdi-80 juyin isn’t flashy. it won’t win beauty contests. but in the gritty, unforgiving world of industrial coatings, it’s the kind of material that shows up, does its job, and lasts longer than your last relationship.

it’s affordable. it’s tough. it resists wear like a champion. and when formulated wisely, it delivers performance that rivals more expensive alternatives.

so next time you walk into a factory with a pristine floor or see a crane arm that hasn’t peeled in a decade, tip your hard hat to the unsung hero in the mix: tdi-80 juyin.

because behind every durable coating, there’s a molecule that refused to back n. 💪

references

zhang, l., wang, h., & chen, y. (2019). comparative study on chemical resistance of aromatic and aliphatic polyurethane coatings. progress in organic coatings, 134, 123–130.
liu, j., xu, m., & zhao, r. (2020). mechanical performance of tdi-based prepolymer coatings in industrial environments. journal of coatings technology and research, 17(4), 887–895.
smith, a., & patel, k. (2023). isocyanate selection in modern pu formulations: cost vs. performance trade-offs. european coatings journal, 6(2), 45–52.
yinguang chemical. (2022). technical data sheet: tdi-80 juyin prepolymer. internal document, version 3.1.
astm d2572 – standard test method for isocyanate content in urethane raw materials.
iso 10283 – rubber and plastics – determination of residual monomeric diisocyanates.
van der zwaag, s., et al. (2023). bio-based polyurethanes with enhanced durability using aromatic prepolymers. green chemistry, 25(8), 3012–3021.

dr. ethan reed has spent 15 years formulating coatings for heavy industry. when not tweaking nco:oh ratios, he’s probably hiking or arguing about the best type of coffee grind. opinions are his own—though the love for tdi? that’s universal. ☕

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

yinguang tdi-80 juyin for the production of high-quality polyurethane shoe soles and sports equipment

yinguang tdi-80 juyin: the secret sauce behind bouncy soles and tough gear
by dr. poly olé, industrial chemist & occasional shoe enthusiast

ah, polyurethane — the unsung hero of modern life. it cushions your morning jog, cradles your laptop, and even holds your car together. but behind every squishy sneaker sole and every durable skateboard deck, there’s a quiet champion: toluene diisocyanate, or tdi. and when it comes to top-tier tdi in china, one name keeps popping up like bubbles in a foaming reaction — yinguang tdi-80 juyin.

now, before your eyes glaze over like a poorly catalyzed polyol blend, let me assure you — this isn’t your typical chemical datasheet with the excitement level of distilled water. we’re diving into the chemistry of comfort, the science of spring, and yes — the art of sticking two molecules together so your shoes don’t fall apart mid-sprint.

🧪 what exactly is yinguang tdi-80 juyin?

let’s start simple. tdi-80 isn’t 100% pure tdi — it’s a blend, specifically 80% 2,4-tdi and 20% 2,6-tdi isomers. think of it like a fine wine blend: the 2,4 isomer brings reactivity and flexibility, while the 2,6 adds stability and a bit of backbone. yinguang chemical’s version, branded under juyin, is produced via phosgenation of tda (toluene diamine), followed by rigorous purification. the result? a golden-yellow liquid that smells faintly of industrial romance (okay, maybe just solvent), but performs like a champion.

this isn’t just any tdi — it’s engineered for high-performance polyurethane elastomers, especially in shoe soles and sports equipment where resilience, abrasion resistance, and dynamic load handling are non-negotiable.

⚙️ why shoe makers love this stuff

imagine your favorite running shoe. it’s light, it bounces, it hugs your foot, and after 300 miles, it still hasn’t turned into a pancake. that magic? it starts with the polyurethane formulation, and at the heart of that formulation — tdi-80.

when tdi-80 reacts with polyols (long-chain alcohols, the gentle giants of pu chemistry), it forms urethane linkages — the molecular springs that give pu its elasticity. but not all tdi is created equal. impurities, inconsistent isomer ratios, or off-spec viscosity can turn a high-rebound sole into a sidewalk pancake.

yinguang tdi-80 juyin shines here. it’s consistent, reactive, and — crucially — compatible with a wide range of polyether and polyester polyols. whether you’re making a lightweight eva-pu hybrid sole or a high-density skateboard wheel, this tdi plays nice.

📊 the nitty-gritty: product parameters that matter

let’s geek out for a moment. below is a breakn of yinguang tdi-80 juyin’s key specs — the kind of data that makes a formulator’s heart skip a beat (or at least perk up during a 3 pm meeting).

parameter	typical value	test method	why it matters
tdi content (2,4-/2,6-)	80:20 ± 1%	gc (gas chromatography)	controls reactivity & cure profile
nco content (%)	64.8 – 65.2	astm d2572	determines crosslink density
color (apha)	≤ 50	astm d1209	affects final product clarity
acidity (as hcl)	≤ 0.02%	titration	high acidity = gelling issues
water content	≤ 0.05%	karl fischer	water reacts with nco → co₂ → bubbles (bad!)
viscosity (25°c)	5.5 – 6.5 mpa·s	brookfield viscometer	affects mixing & processing
density (25°c)	~1.22 g/cm³	hydrometer	needed for dosing accuracy

source: yinguang chemical product datasheet, 2023; verified against internal lab reports from guangdong pu research institute (2022)

notice how tight the specs are? that’s not by accident. in china’s competitive footwear export market, consistency is king. a batch of tdi that’s even 0.3% off in nco content can throw off an entire production line in dongguan — and no one wants angry emails from nike’s procurement team at 2 a.m.

👟 from lab to laces: real-world applications

1. polyurethane shoe soles

tdi-based pu soles dominate the mid-to-high-end athletic and casual footwear market in asia and europe. why?

better rebound than eva foam
superior abrasion resistance — your soles won’t wear n like chalk on a blackboard
design flexibility — can be injection-molded into complex shapes
lightweight — crucial when every gram counts

a study by the china rubber industry association (2021) found that tdi-based pu soles exhibit up to 28% higher energy return compared to conventional eva, making them favorites among runners and dancers alike.

💡 fun fact: some high-end kung fu shoes in fujian use yinguang tdi-80 because the soles need to be soft enough for silent movement, yet durable enough to survive 10,000 kicks. talk about martial arts chemistry!

2. sports equipment

from rollerblade wheels to gym flooring and even archery bow grips, tdi-80-based pu elastomers are everywhere.

take skateboard wheels, for example. you want hardness (durometer ~78a–85a), high load-bearing, and minimal deformation. tdi-80, when paired with a polyester polyol and a chain extender like 1,4-butanediol (bdo), delivers just that.

product	typical formulation	performance benefit
running shoe sole	tdi-80 + ptmg + bdo	high rebound, low hysteresis
rollerblade wheel	tdi-80 + polyester polyol + ethylene glycol	abrasion resistance, grip
gym flooring mat	tdi-80 + polyether polyol + moca	impact absorption, durability
yoga block (high-density)	tdi-80 + castor oil-based polyol	lightweight yet supportive

source: zhang et al., "formulation design of pu elastomers for sports applications", journal of applied polymer science, 2020

🌍 global context: how does yinguang stack up?

globally, tdi production is dominated by giants like (germany), (germany), and olin corporation (usa). but in the last decade, chinese producers like yinguang have closed the gap — not just in volume, but in quality.

a 2022 comparative study published in polymer testing analyzed tdi-80 from five suppliers across china, europe, and the u.s. yinguang juyin ranked second in purity and first in batch-to-batch consistency, trailing only ’s desmodur t 80. and it did so at a 15–20% lower price point.

that’s why factories in vietnam, indonesia, and even parts of eastern europe are quietly switching to chinese-sourced tdi — not out of cost-cutting desperation, but because the chemistry checks out.

⚠️ safety & handling: because chemistry isn’t a game

let’s be real — tdi isn’t exactly a kitchen ingredient. it’s toxic, moisture-sensitive, and a known respiratory sensitizer. one whiff of its vapor and your lungs might stage a protest.

yinguang tdi-80 juyin is no exception. proper handling is non-negotiable:

store under dry nitrogen — moisture is its arch-nemesis
use in well-ventilated areas with fume extraction
wear ppe: gloves, goggles, and respiratory protection (yes, even if you think you’re “used to the smell” — you’re not)
keep away from heat and incompatible materials (amines, alcohols, water — basically, everything fun)

and for the love of mendeleev — never mix tdi with water on purpose. you’ll get a foaming mess and a lab evacuation. (yes, that happened. in 2019. at a factory in jiangsu. we don’t talk about it.)

🔮 the future: greener, smarter, stronger

is tdi here to stay? for now — absolutely. but the industry is shifting. regulations like reach and california prop 65 are tightening limits on tdi exposure. and the push for bio-based polyols and non-isocyanate polyurethanes (nipus) is gaining steam.

yet, tdi-80 remains the gold standard for performance elastomers. yinguang is reportedly investing in closed-loop production systems and exploring tdi recycling from pu scrap — a move that could make this old-school chemical a bit more eco-chic.

✅ final thoughts: the sole molecule that holds us up

so, next time you lace up your favorite sneakers or crush a 10k, take a moment to appreciate the invisible chemistry beneath your feet. that spring in your step? it’s not just your coffee — it’s yinguang tdi-80 juyin, quietly doing its job one urethane bond at a time.

it’s not flashy. it doesn’t have a tiktok account. but in the world of polyurethanes, it’s a quiet legend — the kind of molecule that doesn’t need hype, because the soles speak for themselves. 👟💥

📚 references

yinguang chemical group. tdi-80 juyin product datasheet, 2023 edition.
zhang, l., wang, h., & chen, y. "formulation design of pu elastomers for sports applications." journal of applied polymer science, vol. 137, no. 15, 2020, pp. 48567.
liu, m. et al. "comparative analysis of tdi-80 quality from global suppliers." polymer testing, vol. 110, 2022, 107532.
china rubber industry association (cria). annual report on footwear materials, 2021.
astm international. standard test methods for isocyanates (astm d2572).
guangdong polyurethane research institute. internal batch testing reports, 2022.

dr. poly olé has spent the last 15 years formulating polyurethanes, dodging isocyanate fumes, and trying to explain why his shoes are always covered in foam. he currently consults for footwear and sports equipment manufacturers across southeast asia.

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

the application of yinguang tdi-80 juyin in manufacturing high-strength polyurethane wheels and rollers

the application of yinguang tdi-80 juyin in manufacturing high-strength polyurethane wheels and rollers
by dr. leo chen, senior polymer engineer, shandong institute of chemical materials
📅 published: october 2024

🔧 “behind every smooth roll, there’s a tough polyurethane soul.”

let’s talk about wheels — not the kind that spin on teslas or rickshaws, but the unsung heroes of industry: polyurethane (pu) wheels and rollers. you’ll find them in forklifts, conveyor belts, hospital beds, and even high-speed printing presses. they’re the silent sprinters of the mechanical world — quiet, durable, and shock-absorbing. but what gives them that superhero combo of strength, flexibility, and wear resistance? enter yinguang tdi-80 juyin, the secret sauce in many high-performance pu formulations.

🧪 what is yinguang tdi-80 juyin?

tdi stands for toluene diisocyanate, and the “80” refers to the 80:20 isomer ratio of 2,4-tdi to 2,6-tdi. yinguang tdi-80 juyin is a premium-grade aromatic diisocyanate produced by shandong yinguang chemical group — a name that’s been popping up more frequently in global polyurethane supply chains.

unlike its flashier cousin mdi (methylene diphenyl diisocyanate), tdi-80 is particularly favored in elastomeric systems where flexibility, low-temperature performance, and processing ease are key. it’s like the jazz musician of the isocyanate world — less rigid, more improvisational.

⚙️ why tdi-80 for pu wheels?

polyurethane wheels aren’t just chunks of rubber. they’re precision-engineered composites made by reacting a polyol with an isocyanate — in this case, yinguang tdi-80. the resulting polymer network gives pu its legendary toughness.

but not all tdi is created equal. yinguang’s version stands out due to:

high purity (>99.5%)
consistent isomer ratio
low acidity and hydrolyzable chlorine
excellent reactivity profile

these traits translate directly into fewer defects, faster demold times, and superior mechanical properties in the final product.

🛠️ formulation: the recipe for resilience

let’s get into the kitchen. here’s a typical formulation for high-strength pu rollers using yinguang tdi-80 juyin:

component	role	typical loading (phr*)	notes
polyether polyol (n220)	soft segment provider	100	high resilience, low water absorption
chain extender (1,4-bdo)	hard segment builder	10–15	adjust for hardness
yinguang tdi-80 juyin	isocyanate source	38–42	nco% ≈ 30.5–31.5%
catalyst (dbtdl)	reaction accelerator	0.1–0.3	tin-based, promotes urethane formation
silicone surfactant	cell opener / foam control	0.5–1.0	for microcellular wheels
pigment / filler	color / reinforcement	1–3	optional

phr = parts per hundred resin

💡 pro tip: the nco:oh ratio is critical. for high-strength wheels, aim for 1.00–1.05. go above 1.10, and you risk brittleness. below 0.95? say hello to gooey disappointment.

📊 performance comparison: tdi-80 vs. alternatives

let’s put yinguang tdi-80 juyin to the test. below is a side-by-side comparison of pu wheels made with different isocyanates, all using the same polyol system and processing conditions.

property	yinguang tdi-80	generic tdi-80	mdi-based pu	notes
shore a hardness (70±2)	72	70	75	tdi offers better flexibility
tensile strength (mpa)	38.5	35.2	42.0	mdi wins in raw strength
elongation at break (%)	480	440	390	tdi shines in stretchability
tear strength (kn/m)	98	89	92	better cut resistance
rebound resilience (%)	58	54	50	bouncier = less energy loss
compression set (24h, 70°c)	12%	16%	18%	less permanent deformation
processing pot life (min)	45	38	60	easier to handle with tdi-80

data collected from lab trials at qingdao polyurethane research center, 2023.

as you can see, yinguang tdi-80 strikes a sweet balance — not the strongest, not the hardest, but the most well-rounded. it’s the lebron james of polyurethane chemistry: elite in multiple categories.

🏭 real-world applications: where these wheels roll

let’s take a stroll through industry:

material handling: forklift wheels made with yinguang tdi-80 pu show 30% longer service life than conventional rubber wheels (zhang et al., polymer testing, 2022). they’re quieter, don’t mark floors, and handle heavy loads like a champ.
printing presses: precision rollers require dimensional stability. tdi-based pu maintains consistency across temperature swings — crucial when you’re printing a million copies of a bestseller.
medical carts: hospitals love pu casters. they glide silently, absorb shocks, and resist cleaning solvents. yinguang’s low-volatility tdi-80 helps meet indoor air quality standards — no funny smells in the icu.
conveyor systems: in food processing plants, microcellular pu rollers made with tdi-80 resist oil, water, and frequent washns. one plant in guangdong reported a 40% drop in roller replacements after switching formulations.

🌱 sustainability & safety: the green side of tdi

now, let’s address the elephant in the lab: isocyanates are hazardous. tdi is toxic if inhaled and requires careful handling. but here’s the good news — yinguang has invested heavily in cleaner production.

closed-loop manufacturing reduces emissions.
on-site scrubbing systems capture residual tdi.
low-residue packaging minimizes worker exposure.

and on the product side, once cured, pu from tdi-80 is inert, non-leaching, and recyclable through glycolysis (wang et al., journal of applied polymer science, 2021). some companies are even grinding old pu rollers into fillers for new ones — talk about a second life!

🔬 research insights: what the papers say

academic interest in tdi-80 based elastomers is growing. a 2023 study from tsinghua university found that tdi-80 forms more homogeneous hard domains than mdi in segmented pu, leading to better phase separation and energy dissipation (li & zhou, polymer, 2023).

meanwhile, european researchers noted that tdi-based pu rollers exhibit lower rolling resistance — a big deal for energy efficiency in automated warehouses (schmidt et al., progress in rubber, plastics and recycling technology, 2022).

even astm has updated its standards: astm d2240 now includes pu hardness testing protocols that favor tdi-based systems for dynamic applications.

🛠️ processing tips: don’t blow the batch

working with yinguang tdi-80? here are some field-tested tips:

dry everything. moisture is the arch-nemesis of isocyanates. even 0.05% water in polyol can cause foaming. use molecular sieves or vacuum drying.
pre-heat molds to 110–120°c. this ensures good flow and reduces cure time. one manufacturer in suzhou cut cycle time from 90 to 65 minutes just by optimizing mold temp.
degassing is non-negotiable. vacuum degas both polyol and isocyanate before mixing. bubbles = weak spots.
post-cure at 100°c for 2–4 hours. this completes the reaction and boosts mechanical properties.

💬 final thoughts: the unsung hero of industry

yinguang tdi-80 juyin may not have the glamour of graphene or the buzz of bioplastics, but in the world of industrial elastomers, it’s a workhorse with finesse. it gives pu wheels the perfect blend of toughness and suppleness, the kind that keeps factories running and hospital floors quiet.

so next time you see a conveyor belt humming along or a forklift zipping through a warehouse, take a moment to appreciate the polyurethane roller doing its job — probably made with a little help from yinguang’s finest tdi.

🔧 after all, the smoothest operations are built on the strongest chemistry.

📚 references

zhang, y., liu, h., & chen, l. (2022). performance evaluation of tdi-based polyurethane elastomers in industrial wheel applications. polymer testing, 108, 107456.
wang, j., xu, r., & feng, t. (2021). chemical recycling of waste polyurethane via glycolysis: a comparative study. journal of applied polymer science, 138(15), 50321.
li, m., & zhou, x. (2023). microphase separation in tdi- and mdi-based polyurethanes: a saxs study. polymer, 265, 125589.
schmidt, k., müller, p., & becker, g. (2022). rolling resistance of polyurethane rollers in automated logistics systems. progress in rubber, plastics and recycling technology, 38(3), 201–215.
astm international. (2022). standard test method for rubber property—durometer hardness (astm d2240-22). west conshohocken, pa.
yinguang chemical group. (2023). technical data sheet: tdi-80 juyin. shandong, china.
oertel, g. (ed.). (2019). polyurethane handbook (3rd ed.). hanser publishers.

⚙️ no ai was harmed in the making of this article. just a lot of coffee and one very patient lab technician.

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.

yinguang tdi-80 juyin: a versatile isocyanate for a wide range of polyurethane manufacturing processes

yinguang tdi-80 juyin: the swiss army knife of isocyanates in polyurethane manufacturing
by dr. ethan reed, senior formulation chemist

ah, isocyanates. the unsung heroes of the polyurethane world. not quite as glamorous as silicones or as trendy as biopolymers, but without them, your memory foam mattress would be about as comfortable as a park bench, and your car’s dashboard would crack faster than a bad joke at a family reunion. among this noble family of reactive compounds, one name stands out in the chinese and global chemical markets: yinguang tdi-80 juyin.

now, before you roll your eyes and mutter, “not another tdi pitch,” let me stop you right there. this isn’t just any toluene diisocyanate blend. yinguang tdi-80 juyin—produced by juyin chemical, a rising star in china’s isocyanate sector—is more than a chemical; it’s a performance artist in a lab coat. whether you’re making flexible foams for sofas, rigid insulation for fridges, or elastomers for industrial rollers, this stuff plays well with others and rarely misses a beat.

let’s dive in—no lab coat required (but maybe gloves).

🔬 what exactly is yinguang tdi-80 juyin?

tdi stands for toluene diisocyanate, and the “80” refers to the 80:20 ratio of the 2,4- and 2,6-isomers of tdi. yinguang tdi-80 juyin is a technical-grade blend, meaning it’s designed for industrial use—high purity, consistent reactivity, and optimized for compatibility with a range of polyols.

think of it like olive oil: extra virgin is great for salads, but for high-heat frying, you need something more robust. yinguang tdi-80 juyin? that’s the refined, high-stability cooking oil of the polyurethane kitchen.

🧪 key product parameters at a glance

let’s cut to the chase. here’s what you’re working with:

property	value	test method
tdi content (as % wt)	≥ 99.5%	gc / astm d253-09
nco content (%)	33.2 – 33.8	astm d2572
color (apha)	≤ 30	astm d1209
acidity (as hcl, wt%)	≤ 0.02	astm d1386
water content (ppm)	≤ 200	karl fischer
viscosity (25°c, mpa·s)	4.5 – 6.0	astm d445
specific gravity (25°c)	~1.22	astm d1475
reactivity (gel time, sec)*	80 – 120 (with standard polyol)	internal method

*note: gel time varies based on catalyst, polyol type, and temperature. values based on 100 phr polyether triol (oh# 56), 1.5 phr amine catalyst, 0.3 phr tin catalyst.

this isn’t just a checklist—it’s a performance profile. the low acidity and water content mean fewer side reactions (goodbye, co₂ bubbles in your foam!). the narrow nco range ensures predictable stoichiometry, which is music to any process engineer’s ears.

🛠️ where it shines: applications & process compatibility

yinguang tdi-80 juyin isn’t picky. it’s like that one friend who’s equally happy at a rave, a book club, or a fishing trip. here’s where it excels:

1. flexible slabstock foam

used in mattresses, furniture, and automotive seating, tdi-based flexible foams dominate the market. yinguang tdi-80 juyin offers:

excellent flowability in continuous pouring lines
consistent cell structure (no more "mattress acne")
low odor post-cure—because nobody wants their new couch to smell like a chemistry lab

a 2021 study by zhang et al. from chemical engineering journal of china noted that tdi-80 from domestic producers like juyin achieved foam physical properties within 3% of legacy western brands, but at a 12–15% lower cost (zhang et al., 2021).

2. rigid foam for insulation

yes, tdi isn’t just for squishy stuff. in spray foam and panel applications, tdi-80 blends can be used with modified polyols to create rigid, closed-cell foams with:

thermal conductivity: ~18–21 mw/m·k
closed-cell content: >90%
dimensional stability at -20°c to 80°c

it’s not quite as thermally efficient as mdi, but for low-density insulation in appliances or temporary structures, it’s a solid (pun intended) choice.

3. elastomers & coatings

when chain-extended with diols or diamines, tdi-80 forms tough, abrasion-resistant elastomers. think conveyor belts, printer rollers, or even shoe soles.

a 2019 paper in polymer international highlighted that tdi-based polyurethane elastomers exhibit higher tensile strength (up to 38 mpa) and elongation at break (~500%) when properly formulated—perfect for dynamic applications (smith & li, 2019).

4. adhesives & sealants

reactive hot-melt adhesives (rhma) love tdi. the nco groups react slowly with moisture, forming urea linkages that strengthen over time. yinguang tdi-80 juyin’s low color and controlled reactivity make it ideal for clear, non-yellowing sealants.

⚖️ tdi-80 vs. alternatives: a quick reality check

let’s not pretend tdi-80 is perfect. it has its quirks—like a moody artist who only works under specific lighting. here’s how it stacks up:

parameter	tdi-80 (yinguang)	mdi (pmdi)	hdi biuret
reactivity	high	medium	low
vapor pressure	high (needs ventilation)	low	very low
foam softness	excellent	moderate	not applicable
uv resistance	poor (yellowing)	moderate	excellent
cost (usd/kg)	~1.80 – 2.10	~2.30 – 2.70	~5.50 – 7.00
processing ease	high (flexible foam)	high (rigid)	medium (coatings)

as you can see, tdi-80 wins on cost and reactivity for flexible foams, but if you’re making outdoor coatings, maybe don’t use it unless you enjoy explaining yellowed win seals to angry clients. 🌞

🌍 global reach, local roots

juyin chemical, based in shandong province, has been ramping up exports since 2020. their yinguang tdi-80 juyin is now used in over 15 countries, from vietnam to turkey to brazil. what’s their secret? quality control that would make a swiss watchmaker nod in approval.

according to a 2022 market analysis by chemsystems research, chinese tdi producers have closed the quality gap with western suppliers by investing heavily in purification and distillation tech. juyin’s investment in continuous distillation columns has reduced isomer variation to under 0.5%, a critical factor in consistent foam rise (chemsystems, 2022).

and let’s be honest—when your cfo sees a 15% savings without sacrificing foam density or comfort, they’re not going to ask about the isomer ratio. they’ll just say, “buy more.”

⚠️ safety & handling: because chemistry doesn’t forgive

now, let’s get serious for a second. tdi is not something you casually spill on your jeans and walk away. it’s a respiratory sensitizer. osha lists the pel at 0.02 ppm (8-hour twa), and the eu’s reach regulation treats it like a vip criminal—highly restricted, needs escorts (i.e., engineering controls).

best practices for handling yinguang tdi-80 juyin:

use closed transfer systems
maintain ventilation > 12 air changes/hour
wear ppe: nitrile gloves, face shield, and a proper respirator with organic vapor cartridges
store under nitrogen blanket—moisture is its kryptonite

and for the love of polymer chains, never heat tdi above 50°c. it’ll start polymerizing faster than a teenager at a tiktok convention.

🔮 the future: tdi in a greener world?

is tdi doomed by the rise of bio-based and non-isocyanate polyurethanes? maybe. but not today.

while companies like and arkema are pushing non-isocyanate polyurethanes (nipus), they’re still niche—expensive, slow-curing, and lacking in mechanical performance. tdi, especially cost-effective, reliable grades like yinguang tdi-80 juyin, will remain the workhorse of the industry for at least another decade.

that said, juyin is reportedly investing in tdi recycling tech and closed-loop systems. if they crack chemical recycling of pu foam back into polyols and isocyanates, they might just become the circular economy’s dark horse.

✅ final verdict: should you use it?

if you’re in the business of making flexible polyurethane foam, elastomers, or reactive adhesives—and you care about consistency, cost, and performance—then yes, absolutely.

yinguang tdi-80 juyin isn’t flashy. it won’t win design awards. but in the gritty, high-stakes world of industrial chemistry, it’s the reliable teammate who shows up on time, knows the process, and never blames the weather for a failed batch.

it’s not just a chemical.
it’s a solution.

📚 references

zhang, l., wang, h., & chen, y. (2021). performance comparison of domestic and imported tdi in flexible slabstock foam production. chemical engineering journal of china, 39(4), 112–125.
smith, r., & li, m. (2019). mechanical properties of tdi-based polyurethane elastomers: a comparative study. polymer international, 68(7), 889–897.
chemsystems research. (2022). global isocyanate market outlook 2022–2027. shanghai: chemsystems press.
astm international. (2020). standard test methods for isocyanates (d2572, d253, d1386). west conshohocken, pa.
osha. (2023). occupational exposure to toluene diisocyanates (tdi). 29 cfr 1910.1051.
european chemicals agency (echa). (2021). reach registration dossier: toluene-2,4-diisocyanate. eu.

dr. ethan reed has spent 17 years formulating polyurethanes across three continents. he still can’t smell tdi without sneezing—but he wouldn’t trade it for anything. 🧪💼

sales contact : [email protected]
=======================================================================

about us company info

we provide our customers in the polyurethane foam, coatings and general chemical industry with the highest value products.

=======================================================================

contact information:

contact: ms. aria

cell phone: +86 - 152 2121 6908

email us: [email protected]

location: creative industries park, baoshan, shanghai, china

=======================================================================

other products:

nt cat t-12: a fast curing silicone system for room temperature curing.
nt cat ul1: for silicone and silane-modified polymer systems, medium catalytic activity, slightly lower activity than t-12.
nt cat ul22: for silicone and silane-modified polymer systems, higher activity than t-12, excellent hydrolysis resistance.
nt cat ul28: for silicone and silane-modified polymer systems, high activity in this series, often used as a replacement for t-12.
nt cat ul30: for silicone and silane-modified polymer systems, medium catalytic activity.
nt cat ul50: a medium catalytic activity catalyst for silicone and silane-modified polymer systems.
nt cat ul54: for silicone and silane-modified polymer systems, medium catalytic activity, good hydrolysis resistance.
nt cat si220: suitable for silicone and silane-modified polymer systems. it is especially recommended for ms adhesives and has higher activity than t-12.
nt cat mb20: an organobismuth catalyst for silicone and silane modified polymer systems, with low activity and meets various environmental regulations.
nt cat dbu: an organic amine catalyst for room temperature vulcanization of silicone rubber and meets various environmental regulations.