Category: PU Technology

PU Technology

Exploration on the application of dioctyltin diacetate as a catalyst in the field of synthetic materials

In the modern chemical industry, catalysts play a vital role. They can accelerate the rate of chemical reactions without being consumed, thereby greatly improving production efficiency and product selectivity. Dioctyltin diacetate, chemical formula [(C8H17)2Sn(OOCCH3)2], as an efficient organotin catalyst, is widely used in the production process of synthetic materials, especially the synthesis of polymers and silicone rubber, showing its Unique catalytic properties and application value.

Structure and properties of dioctyltin diacetate
Dioctyltin diacetate is an organic metal compound composed of two acetate ions and one dioctyltin ion. It is usually a light yellow or colorless transparent liquid with a typical acetic acid odor. This compound is relatively stable at room temperature, but may transform into a solid or semi-solid state below 10°C. Its molecular structure gives excellent thermal stability and good processing properties, which makes dioctyltin diacetate the first choice among many synthetic material catalysts.

Applications of synthetic material catalysts
Room temperature silicone rubber curing
Dioctyltin diacetate plays a central role in the curing process of room temperature silicone rubber. As a curing catalyst, it significantly accelerates the transformation of deacetized silicone prepolymers into a cross-linked solid state without the need for high temperature conditions. This low-temperature curing property not only saves energy, but also protects sensitive substrates from high temperature damage. It is widely used in electronic packaging, medical equipment, building sealing and other fields. By adjusting the ratio of dioctyltin diacetate to other catalysts such as dibutyltin dilaurate (for example, 1:9 or 2:8), the acetic acid odor can be effectively controlled and the curing rate and product quality can be optimized.

Polyurethane Catalyst
In addition to its application in the silicone rubber industry, dibutyltin diacetate is also an important catalyst for the synthesis of polyurethane (PU) materials. In the production of products such as polyurethane elastomers, rigid foams, and high-resilience molded foams, it can promote the rapid reaction of isocyanates and polyols, ensure uniform expansion and curing of foams, and improve the mechanical properties and durability of the products. . Especially in the manufacture of spray rigid polyurethane foam, its rapid catalytic ability is particularly important and can significantly improve production efficiency.

Catalysis of other synthetic materials
In addition, dioctyltin diacetate has demonstrated its versatility in the production of a variety of other synthetic materials. For example, in the preparation of plastic stabilizers, it can improve the aging resistance and weather resistance of plastic products and extend their service life. In the synthesis process of some special polymers, by finely controlling the reaction conditions, dioctyltin diacetate can guide the generation of specifically functionalized polymers to meet the needs of high-performance materials.

Environmental and Safety Considerations
Although dioctyltin diacetate has broad application prospects as a catalyst in the field of synthetic materials, its potential environmental and health risks cannot be ignored. Organotin compounds have long been considered environmental pollutants and pose a particular threat to aquatic ecosystems. Therefore, it is necessary to strictly abide by environmental protection regulations during use, take effective safety measures, such as sealed storage, avoid leakage, and properly dispose of waste after use.

Conclusion
With its unique catalytic properties, dioctyltin diacetate has shown excellent value in the field of synthetic materials, especially in the production of room temperature silicone rubber and polyurethane materials. As the chemical industry pays increasing attention to environmental protection and sustainability, developing greener and less toxic alternatives, as well as optimizing the efficiency and safety of existing catalysts, will be the focus of future research. Through continuous technological innovation and application exploration, dioctyltin diacetate and its derivatives will continue to play an important role in the field of synthetic materials and promote the green development of the chemical industry.
Further reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)
High Quality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate
High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate<

The mechanism of action of dioctyltin dilactate in plastic processing

Dioctyltin dilactate (DLTOS), as a special type of organotin compound, plays a vital role in the plastic processing industry. Its application mainly focuses on its function as a catalyst and stabilizer, optimizing the processing performance of plastics, enhancing their physical properties, and extending the service life of the product through a unique chemical reaction mechanism. The following is a detailed analysis of the mechanism of dioctyltin dilactate in plastic processing.

1. Catalytic mechanism

Catalysis of esterification reaction

During plastic processing, especially when producing polymers such as polyvinyl chloride (PVC) and polyurethane (PU), dioctyltin dilactate participates in esterification reactions as an efficient catalyst. When alcohols and acids need to be converted into corresponding esters (such as the production of plasticizer DOP), DLTOS can significantly reduce the activation energy of the reaction and accelerate the formation of ester bonds. The mechanism is that the tin atoms in the organotin molecules have good electrophilicity and can effectively combine and activate acid or alcohol molecules to promote the coupling reaction between them. In addition, the long-chain alkyl (octyl) structure provides a steric hindrance effect, which helps to directionally arrange the reactants and improve the selectivity and efficiency of the reaction.

Polymerization Catalysis

In polyurethane synthesis, dioctyltin dialactate can catalyze the reaction between isocyanate (-NCO) and hydroxyl group (-OH), promoting the formation of prepolymers and the growth of polymer chains. Its unique structure can stabilize intermediates, reduce side reactions, improve the molecular weight and chain regularity of the polymer, thereby enhancing the physical and mechanical properties of the material.

2. Stabilization mechanism

Inhibit thermal degradation

During the processing and use of PVC, due to the influence of high temperature and shearing force, the HCl removal reaction easily occurs, resulting in discoloration and embrittlement of the material. As a thermal stabilizer, dioctyltin dilactate can capture free radicals triggered by heat and prevent the chain degradation reaction from proceeding. Its organotin structure can form a stable complex with unstable chlorine atoms in the PVC chain, effectively inhibiting the release of HCl, thereby maintaining the transparency and mechanical properties of the material.

Photostabilization

DLTOS also has certain photostability, can absorb and quench ultraviolet energy, and reduce the damage of ultraviolet rays to polymer chains. This helps prevent aging and discoloration of plastic products under long-term sunlight and extends their service life.

3. Affects mechanical properties

Dioctyltin dilactate significantly improves the hardness, strength and toughness of the material by promoting cross-linking between molecules and increasing the network density within the polymer. This cross-linking effect not only improves the initial mechanical properties of the material, but also enhances its stability and durability in harsh environments (such as high temperature and high humidity).

4. Environmental and safety considerations

Although dioctyltin dilactate exhibits excellent performance in plastic processing, its use also requires environmental and safety considerations. Organotin compounds may accumulate in organisms and pose a potential threat to ecosystems. Therefore, its production and use should comply with strict environmental regulations and take effective control measures, such as rationally designing formulas to reduce dosage, optimizing production processes to reduce emissions, and ensuring proper handling and recycling of waste materials.

Conclusion

The mechanism of action of dioctyltin dilactate in plastic processing involves its use as a catalyst to accelerate esterification and polymerization reactions, and as a stabilizer to inhibit heat and light-induced degradation, thereby comprehensively improving the processing performance, physical properties and service life of plastic products. While enjoying the many benefits it brings, we should also pay attention to its environmental protection and safety, and continue to promote the application and development of green chemistry.

Extended reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

High Quality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate

High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate

Comparison of dioctyltin dilactate raw material suppliers

When selecting dioctyltin dilactate (DLTOS) raw material suppliers, companies need to comprehensively consider multiple factors to ensure product quality and supply chain stability performance, technical support and price competitiveness. Below is a comparison of several well-known vendors to help customers make more informed decisions.

1. Hubei Hengjingrui Chemical Co., Ltd.

  • Product Line: Hengjingrui Chemical focuses on providing a variety of chemical raw materials including dioctyltin oxide, demonstrating its expertise in the field of organotin compounds. This is a convenient one-stop purchasing option for customers who need a variety of chemical raw materials.
  • Service features: The company provides detailed product information, including real-time prices, spot status and professional technical support. Multiple contact methods such as telephone and QQ facilitate quick communication, reflecting the flexibility of its customer service.
  • Supply chain stability: As a domestic supplier, Hengjingrui Chemical is geographically close to the market and may have certain advantages in logistics response speed, but it needs to further understand its inventory management and production Plan stability.

2. Xindian Chemical Materials (Shanghai) Co., Ltd.

  • Professional advantages: Xindian Chemical not only provides dioctyltin diacetate, but also is involved in a variety of catalyst fields, demonstrating its deep accumulation in catalyst technology. This provides a strong support platform for customers seeking customized solutions or technical consulting services.
  • Innovation and customization: Emphasizing the high quality of products and customized services, it is suitable for high-end markets and R&D projects that have special requirements for raw materials. This feature of Shindian Chemical may mean higher R&D investment and a more flexible production model.
  • Market response: Located in Shanghai, Xindian Chemical can quickly respond to international market demand, while also benefiting from Shanghai’s supply chain network as an important chemical base in China.

3. Hubei Rishengchang New Material Technology Co., Ltd.

  • Price Competitiveness: The raw material price of dioctyl tin dilaurate was quoted at 24 yuan per kilogram, which shows its price competitiveness. For cost-conscious customers, this is a very attractive point.
  • Supply chain capabilities: As a VIP-level supplier, Rishengchang emphasizes its long-term and stable supply capabilities, which is a plus for customers who need to secure raw materials for large-scale production. However, the risk resistance of specific supply chains needs further evaluation, especially in the context of global supply chain fluctuations.

Factors to consider in supplier selection

  • Quality Control: No matter which supplier is chosen, the first consideration is whether the product meets industry standards and the needs of the specific application. Certification, test reports and customer feedback are important basis for judging quality.
  • Supply chain stability: Today, when global supply chains are facing challenges, suppliers’ inventory management, emergency response mechanisms, and diversified supply chain sources are particularly important.
  • Technical support and services: For customers who need technical guidance or customized solutions, the supplier’s technical service capabilities are the key to determining the depth of cooperation.
  • Price and payment terms: Although price is an important factor, cost-effectiveness needs to be considered comprehensively. At the same time, reasonable payment terms and credit policies can also reduce customers’ financial pressure.
  • Sustainability and environmental protection: As environmental regulations become increasingly strict, suppliers’ environmental compliance and whether they have green production plans are also factors that cannot be ignored when making selections.

In summary, when selecting raw material suppliers of dioctyltin dilactate, companies should comprehensively evaluate the advantages and disadvantages of each supplier based on their own needs. Identify suitable partners through on-site inspections, sample testing, price negotiations, etc. During the cooperation process, establishing a long-term communication mechanism and providing timely feedback on market dynamics and demand changes will help both parties grow together and achieve a win-win situation.

Extended reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

HighQuality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate

High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate

Guidelines for safe storage and handling of dioctyltin dilactate

Dioctyltin dilactate (DLTOS), as an important organotin compound, plays the role of catalyst and stabilizer in the synthetic materials industry. It has a significant effect on improving material performance. However, its chemical nature dictates that strict safety guidelines must be followed during storage and handling to ensure personnel safety, environmental protection and product quality are not compromised.

Safe Storage Guide

  1. Environmental Conditions: Dioctyltin dilactate should be stored in a cool, dry and well-ventilated place. The ideal storage temperature should be maintained within the normal range and avoid high temperature and freezing conditions to prevent product deterioration or decomposition. Since light may cause changes in chemical properties, storage areas should be protected from light.
  2. Sealed storage: In order to prevent the product from deterioration due to contact with air and moisture, dioctyltin dilactate must be sealed in the original container. Containers should be intact and tightly closed to reduce contact with the outside environment.
  3. Isolated storage: Since dioctyltin dilactate may react with other substances, it should be stored separately from oxidants, acid and alkali substances, strong reducing agents and flammable items to avoid unnecessary chemical reaction occurs.
  4. Clearly marked: Storage areas should be clearly marked with the name of the product, hazard category, location of the safety data sheet (SDS), and emergency contact information to allow for rapid response in the event of an emergency.
  5. Restricted access: The storage area should be locked and managed, and only authorized personnel can enter to reduce the risk of misoperation.

Safety Operation Guide

  1. Personal Protection: Before operating, workers must wear appropriate personal protective equipment, including but not limited to protective glasses, chemical-resistant gloves, dust masks, and protective clothing to prevent skin contact and Inhalation of harmful vapors.
  2. Good ventilation: In areas where dioctyltin dilactate is used, a good ventilation system should be ensured to reduce the concentration of vapors that may be present in the air and avoid long-term exposure to harmful environments.
  3. Handle with caution: Handle with care when handling and avoid violent vibration or heating to prevent container rupture or product leakage. Use specialized tools for weighing and transfer and avoid direct contact.
  4. Emergency Preparedness: Workplaces should be equipped with necessary emergency facilities such as eyewash stations, safety showers, spill kits and fire extinguishers. All employees should receive regular safety training and know the correct procedures for responding to emergencies such as leaks and fires.
  5. Disposal: Used waste and expired products should not be thrown away randomly, but should be collected and disposed of in accordance with national and local environmental protection regulations. It is recommended to consult a professional waste disposal company to ensure compliance.
  6. Health monitoring: Workers who are exposed to organotin compounds for a long time should undergo regular health examinations, especially monitoring of the nervous system, liver function and reproductive system, and promptly detect and deal with possible causes of occupational exposure. health problems.

Conclusion

Although dioctyltin dilactate has shown extremely high value in industrial applications, its potential health and environmental risks cannot be ignored. Following the above safe storage and operation guidelines can not only protect the health and safety of workers, but also an important manifestation of maintaining the sustainable development and social responsibility of enterprises. In daily operations, continuous attention to safety information and updates to laws and regulations, and continuous optimization of operating procedures are the keys to ensuring safe production. Through the implementation of comprehensive management measures, potential risks can be reduced while utilizing its superior properties, and the healthy development of the synthetic materials industry can be promoted.

Extended reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

High Quality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate

High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate

Improved performance of dioctyltin dilactate synthetic materials

Dioctyltin dilactate (DLTOS), as a high-performance organotin compound, has been used in the field of synthetic materials in recent years due to its unique physical properties. Chemical properties and significant improvements in material performance have attracted widespread attention. As a catalyst or additive, dioctyltin dilactate has demonstrated outstanding capabilities in improving the processing properties of polymers, enhancing thermal stability, improving mechanical properties and improving product performance. It is an indispensable part of modern materials science.

Optimization of processing performance

During the processing of synthetic materials such as plastics and rubber, dioctyltin dilactate accelerates chemical reactions, shortens reaction times, and improves production efficiency with its excellent catalytic activity. For example, in the processing of polyvinyl chloride (PVC), DLOST, as a heat stabilizer, can effectively inhibit the degradation of PVC during high-temperature processing, reduce the release of hydrogen chloride, make the processing process smoother, reduce equipment corrosion, and at the same time improve Improve the surface finish and color stability of the product. This not only improves processing conditions, but also significantly improves the appearance and quality of the product.

Enhancement of thermal stability

Dioctyltin dilactate, as a thermal stabilizer, is crucial to extending the service life of synthetic materials. In high-temperature environments, many polymers are susceptible to thermal oxidative degradation, leading to material discoloration, reduced strength, and even cracking. DLOST blocks the chain reaction of thermal degradation by capturing and neutralizing free radicals, significantly enhancing the thermal stability of the material. This is particularly important for materials that need to be used in high-temperature environments, such as wire and cable insulation, construction materials, and automotive components. It enables these materials to maintain good physical and mechanical properties even under prolonged thermal stress, extending the service life of the product.

Improvement of mechanical properties

Organotin compounds, especially dioctyltin dilactate, can also improve the mechanical properties of synthetic materials by improving the intermolecular forces. In polymer materials such as polyurethane and epoxy resin, DLOST serves as a catalyst or cross-linking agent, promoting effective cross-linking between molecules and increasing the hardness, strength and toughness of the material. This enhanced mechanical property is of great significance for applications that need to withstand high mechanical loads, such as composite materials, coatings and adhesives, and can meet more stringent service conditions.

Improvement of environmental adaptability

With increasingly stringent global environmental standards, dioctyltin dilactate is highly regarded for its lower toxicity than other traditional metal catalysts. It improves the performance of synthetic materials while reducing potential environmental impact. Although organotin compounds are not completely harmless, their environmental risks have been greatly reduced through scientific use and strict waste management. In some applications, dioctyltin dilactate is gradually replacing traditional heavy metal catalysts, in line with the concepts of sustainable development and green chemistry.

Storage and usage precautions

Although dioctyltin dilactate is excellent in improving the performance of synthetic materials, safety and environmental protection still need to be paid attention to during storage and use. It should be stored in a cool, dry, well-ventilated place away from direct sunlight and high temperatures to prevent decomposition or performance degradation. Operators should wear appropriate personal protective equipment, avoid direct contact and inhalation of its vapors, and ensure good ventilation in the workplace to reduce potential health risks.

Conclusion

In short, dioctyltin dilactate has the advantages of improving processing performance, enhancing thermal stability, improving mechanical properties and environmental friendliness. With its outstanding performance, it has become one of the indispensable additives in the field of synthetic materials. With the continuous advancement of materials science and the increasing environmental protection requirements, the research and application of dioctyltin dilactate and its derivatives will continue to expand, providing strong support for the development of new materials with better quality and more environmental protection. In the future, by further optimizing its synthesis process, reducing costs and exploring more application scenarios, dioctyltin dilactate will play a greater role in promoting the green development of the materials industry.

Extended reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

High Quality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate

High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate

Application of dioctyltin dilactate catalyst

Dioctyltin dilactate, as an efficient organotin catalyst, has been widely used in the field of synthetic materials due to its unique chemical properties and good catalytic activity. plays a vital role. It not only promotes the efficient conduct of various chemical reactions, but also shows significant advantages in improving product quality, reducing costs, and being environmentally friendly. This article will deeply explore the application of dioctyltin dilactate as a catalyst, including its role in esterification reactions, polymerization reactions, and other organic synthesis processes. It will also briefly analyze its environmental protection characteristics and storage requirements.

Catalytic properties of dioctyltin dilactate

Dioctyltin dilactate is an organotin compound with two long-chain alkyl (octyl) and lactate groups. This structure gives it good hydrophobicity and stability, making it an ester. An ideal catalyst for chemical reactions. During the esterification process, it can effectively promote the combination of alcohols and acids to form corresponding ester compounds. This feature is particularly important when synthesizing plasticizers such as dioctyl phthalate (DOP). DOP is one of the commonly used plasticizers in the plastics industry and is widely used in the flexibility treatment of polyvinyl chloride (PVC) and other polymers.

Efficient catalytic esterification reaction

In the process of synthesizing DOP, dioctyltin dilactate can significantly speed up the reaction rate and reduce the formation of by-products, thus improving the purity and yield of the product. By finely regulating the amount of catalyst and reaction conditions, optimized process parameters can be achieved to ensure efficient esterification reaction. In addition, compared with traditional inorganic acid catalysts, the dioctyltin dilactate catalyst is easy to separate after the reaction, reducing subsequent processing steps and reducing production costs.

Polymerization Catalyst

In addition to esterification reactions, dioctyltin dilactate is also widely used in polymer synthesis, such as the production of polyurethane. In the polyurethane reaction system, it can be used as a catalyst to promote the cross-linking of isocyanate and polyol to form high molecular weight polyurethane materials. This type of material is widely used in automobiles, construction, furniture and other industries due to its excellent mechanical properties, weather resistance and diversity.

Environmental protection and sustainability

With the continuous improvement of global environmental protection requirements, the advantages of dioctyltin dilactate as an organotin catalyst have gradually emerged. Compared with some traditional heavy metal-containing catalysts, it releases less harmful substances during use, which is beneficial to environmental protection and production process safety. However, although it is relatively environmentally friendly, attention must still be paid to its recycling after use to prevent potential environmental pollution.

Storage and Security

Due to the chemical stability of dioctyltin dilactate, its storage conditions are relatively mild, but strict safety regulations must be followed. It is usually required to be stored in a room temperature, dark, ventilated and dry environment, and sealed to avoid contact with air and moisture to prevent decomposition or failure. The storage location should be away from sources of fire, oxidants and water to ensure safety. In addition, due to its chemical properties, operators should take appropriate safety measures during use, such as wearing protective gear to prevent skin contact or inhalation of its vapors.

Conclusion

In summary, dioctyltin dilactate, as a type of highly efficient organotin catalyst, has shown broad application potential in synthetic materials science . Not only does it exhibit excellent catalytic efficiency in esterification and polymerization reactions, it is also favored for its environmental friendliness and ease of operation. In the future, with the deepening of research and technological advancement, the application scope of dioctyltin dilactate and its analogs is expected to be further expanded, while playing a greater role in sustainable development and environmental protection. Therefore, the continuous optimization of its performance and the exploration of application fields will be the key direction to promote the development of related industries.

Extended reading:

Dabco amine catalyst/Low density sponge catalyst

High efficiency amine catalyst/Dabco amine catalyst

Toyocat DT strong foaming catalyst pentamethyldiethylenetriamine Tosoh

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

High Quality 3164-85-0 / K-15 Catalyst / Potassium Isooctanoate

High Quality Bismuth Octoate / 67874-71-9 / Bismuth 2-Ethylhexanoate

Application and progress of di(dodecylthio)dioctyltin catalysts in polymerisation reactions

Catalysts play a crucial role in the rapid development of modern polymer chemistry and materials science, especially in polymerisation reactions, where they can significantly affect the structure, properties and productivity of the products. Di(dodecylthio)dioctyltin, abbreviated as DODST (Di(octyldecyl)dithiostannate), as a highly efficient organotin catalyst, has demonstrated a wide range of potentials and applications in the field of polymer synthesis due to its unique structural features and excellent catalytic properties. In this paper, the application of DODST catalysts in different polymerisation reactions will be discussed in depth, as well as the research progress in this field in recent years.

Catalytic mechanism and properties
The core of DODST catalyst lies in the dodecyl sulfur group in its structure. These two long-chain thiol groups not only provide good hydrophobicity, but also enhance the interaction with the reaction substrate, thus promoting the polymerisation reaction. During the polymerisation process, DODST stabilises the polymer chain growth through coordination with the active centre, reducing chain transfer and termination reactions, which in turn increases the molecular weight and degree of polymerisation of the product. In addition, its octyl chain segments confer good solubility and dispersibility, making the catalyst more flexible for application in various solvent systems and polymerisation conditions.

Polymerisation Applications
1. Polyolefin synthesis
In polyolefin synthesis, DODST, as a component of Ziegler-Natta type catalysts, shows highly efficient catalytic activity for the polymerisation of propylene, ethylene and their copolymer monomers. It can effectively control the structural regularity of polymers, especially for the production of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), DODST catalysts can significantly improve the crystallinity and mechanical strength of the products, as well as to reduce the catalyst residue, and improve the purity of the products.

2. Thermoplastic Elastomer Synthesis
In the synthesis of thermoplastic elastomers (TPEs), DODST promotes the formation of block copolymers or graft copolymers with its unique catalytic properties. For example, in the preparation of styrene-butadiene-styrene (SBS) or polyurethane (TPU), DODST is able to precisely regulate the growth of the polymerisation chain and ensure the orderly arrangement of the soft and hard segments, thus optimising the elasticity and processing properties of TPEs.

3. Functional polymer synthesis
In the synthesis of polymers with special functional groups, DODST catalysts are favoured for their mild reaction conditions and good compatibility with functional groups. For example, in the preparation of fluoropolymers, photosensitive polymers or biodegradable polymers, DODST is able to facilitate the introduction of specific functional groups for specific applications, such as the development of optical, medical or environmentally friendly materials.

Research Progress and Challenges
In recent years, research on DODST catalysts has deepened in response to increasing environmental requirements and growing demand for high-performance materials. On the one hand, researchers are working to develop greener, less toxic variants of DODST catalysts to reduce the potential impact on the environment while maintaining or enhancing catalytic efficiency. On the other hand, improving the selectivity and recycling of catalysts through molecular design and surface modification techniques is a hot topic of current research.

Conclusion
As a class of high-performance organotin catalysts, di(dodecylthio)dioctyltin exhibits a wide range of applications and significant technical advantages in polymerisation reactions. It not only promotes the progress of polymer material synthesis technology, but also provides strong support for the development of new materials. In the face of future challenges, the continuous optimisation of catalyst performance, the development of environmentally friendly catalysts and the exploration of their applications in emerging fields will be the key directions of research. With the advancement of science and technology and the diversification of market demands, the application scope and efficacy of DODST catalysts are expected to be further expanded, contributing to the sustainable development of polymer materials science.

 
extended reading：

NT CAT DMDEE

NT CAT PC-5

NT CAT DMP-30

NT CAT DMEA

NT CAT BDMA

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Low-odor reactive catalysts: improving the environment and industrial efficiency

Low-odor reactive catalysts: improving the environment and industrial efficiency
Catalysts are a vital material in industrial production and chemical reactions. They accelerate reaction rates, improve product purity and can often be reused many times, resulting in cost savings. However, with increased awareness of environmental protection and employee health and safety, the odor that can be generated by conventional catalysts has become a significant issue. To address this issue, low-odor reactive catalysts have been developed.
Low-odor reactive catalysts have the following distinctive features:
1. Odor Control: These catalysts produce significantly less odor during the chemical reaction process. This feature is especially important for industries that require clean working environments and reduced odor contamination, such as food processing and pharmaceutical manufacturing.
2. High Efficiency: Low odor reactive catalysts not only reduce odor generation, but also maintain the high catalytic efficiency of traditional catalysts. They are able to achieve higher conversion rates at lower temperatures and pressures, thus increasing productivity.
3. Environmentally friendly: By reducing odor emissions, low-odor reactive catalysts help to reduce the level of environmental pollution caused by industrial production and reduce the impact on surrounding air quality, in line with the concept of sustainable development.
4. Widely applicable: These catalysts can be used in chemical reactions in a wide range of industrial sectors, including organic synthesis, petroleum processing, gas treatment, and more. Their design flexibility allows them to meet the requirements of different reactions.
5. Technological innovation: The development of low-odor reactive catalysts requires a combination of advanced materials science, catalytic chemistry and engineering technology, which promotes technological innovation and progress in related fields.
Overall, the emergence of low-odor reactive catalysts not only improves the working environment and productivity, but also pushes industrial production in a more environmentally friendly and sustainable direction. As environmental and health and safety concerns continue to grow, this type of catalyst will find wider application and development in the future.
Translated with DeepL.com (free version)
Recommended Reading：
https://www.cyclohexylamine.net/dabco-mp608-delayed-equilibrium-catalyst/
https://www.cyclohexylamine.net/teda-l33b-dabco-polycat-gel-catalyst/
https://www.cyclohexylamine.net/addocat-106-teda-l33b-dabco-polycat/
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https://www.cyclohexylamine.net/dabco-ne1060-non-emissive-polyurethane-catalyst/
https://www.cyclohexylamine.net/non-emissive-polyurethane-catalyst-dabco-ne1060-catalyst/
https://www.cyclohexylamine.net/high-efficiency-amine-catalyst-dabco-amine-catalyst/
https://www.cyclohexylamine.net/dabco-amine-catalyst-low-density-sponge-catalyst/
https://www.cyclohexylamine.net/efficient-reaction-type-equilibrium-catalyst-reactive-equilibrium-catalyst/
https://www.cyclohexylamine.net/nn-dicyclohexylmethylamine/

An investigation of the chemical properties of bis(dodecylthio)dibutyltin

Title: An investigation of the chemical properties of bis(dodecylthio)dibutyltin

In the field of modern organic synthetic chemistry and materials science, organotin compounds have attracted much attention because of their unique physicochemical properties, among which bis(dodecylthio)dibutyltin, as a typical organotin compound, is of great significance in the study of its chemical properties for the understanding of its applications in the fields of catalysts, stabilisers and bactericides. In this paper, we will discuss the chemical properties of bis(dodecylthio)dibutyltin from the aspects of structural features, stability, reactivity and environmental protection properties.

Structural characteristics
Bis(dodecylthio)dibutyltin, the chemical formula of which can be expressed as [(C12H25S)2Sn(C4H9)2], is an organostannic compound containing two long-chain dodecylsulfanyl groups and two butyl groups. This structure endows the compound with both hydrophobicity (due to the presence of the long-chain alkyl groups) and good solubility in organic phases, which is essential for its application in organic media. At the same time, the chemical bond formed between the tin and sulphur atoms has a certain polarity, which influences its reactivity and interaction with other molecules.

Stability
Bis(dodecylthio)dibutyltin exhibits relatively good thermal and chemical stability. At room temperature, the compound is not easily oxidised or hydrolysed and is able to maintain its structure over a wide temperature range. However, at high temperatures or under strong acid and alkali conditions, especially in the presence of oxidising agents, its stability decreases significantly, which may lead to structural damage or the release of tin ions. This property requires special consideration when selecting them as additives or catalysts.

Reactivity
The reactivity of this compound is mainly reflected in the coordination reactions and catalytic processes in which it is involved. Due to the nucleophilic nature of the sulphur group, bis(dodecylthio)dibutyltin is able to form stable complexes with a wide range of transition metals, which is particularly important in catalysing polymerisation and addition reactions. In addition, it can act as a stabiliser to prevent chain transfer reactions in polymer synthesis, thereby improving the molecular weight and thermal stability of the product. It is worth noting that its reactivity is also affected by factors such as solvent environment, temperature and pressure, and its performance in a particular reaction can be optimised by modulating these conditions.

Environmentally Friendly Properties
The environmental behaviour of organotin compounds has become one of the main focuses of research as global awareness of environmental protection increases. Although bis(dodecylthio)dibutyltin (DBT) has been widely used in several industrial fields due to its high efficiency, its potential ecotoxicity cannot be ignored. Studies have shown that organotin compounds are difficult to degrade in the environment and may cause cumulative toxicity to aquatic organisms. Therefore, the development of low-toxicity and easily biodegradable alternatives, as well as the strict control of their post-use treatment and discharge, are important directions for current research.

Conclusion
As an important class of organotin compounds, bis(dodecylthio)dibutyltin (BSDBT) exhibits a wide range of potential applications in the fields of chemical synthesis and materials science due to its unique chemical properties. Understanding and mastering its structural characteristics, stability, reactivity and its environmental impact are of great significance for the rational use of this compound and the sustainable development of related industries. Future research should further explore the possibilities of its new applications, and at the same time strengthen the assessment of its safety and environmental protection to ensure the harmonious coexistence of scientific and technological progress and environmental protection.

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Phenylarsinic acid

Phenylarsinic acid structural formulaPhenylarsinic acid structural formula

Structural formula

Business number 02D6
Molecular formula C6H7AsO3
Molecular weight 202.04
label

Ai3-16050[qr],

Arsonicacid,phenyl-,

Arsonicacid,phenyl-[qr],

Kyselinabenzenarsonova,

Monophenylarsonic acid,

Phenylarsenic acid,

Phenyl-arsonicaci,

Phenylarsonic acid[qr]

Numbering system

CAS number:98-05-5

MDL number:MFCD00002097

EINECS number:202-631-9

RTECS number:CY3150000

BRN number:None

PubChem ID:None

Physical property data

1. Characteristics: White crystalline powder.


2. Density (g/mL,25℃): 1.76


3. Relative vapor density (g/mL,air =1): Undetermined


4. Melting point (ºC): 160


5. Boiling point (ºC,normal pressure): Undetermined


6. Boiling point (ºC, kPa): Not determined


7. Refractive index: Undetermined


8. Flashpoint (ºC): Undetermined


9. Specific optical rotation (º): Undetermined


10. Autoignition point or ignition temperature (ºC）: Undetermined


11. Vapor pressure (mmHg, 55ºC): Undetermined


12. Saturated vapor pressure (kPa, 25 ºC): Not determined


13. Heat of combustion (KJ/mol): Undetermined


14. Critical temperature (ºC): Undetermined


15. Critical pressure (KPa): Undetermined


16. Oil and water (octanol/Log value of the partition coefficient (water): undetermined


17. Explosion limit (%,V/V): Undetermined


18. Lower explosion limit (%,V/V): Undetermined


19. Solubility: Undetermined

Toxicological data

Acute toxicity: Rat oral LD50: 50mg/kg;
 MouseOral LD50：270μg/kg;
-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA”>Rabbit intravenous injectionLD50:16mg/kg;

Ecological data

It is extremely harmful to water and toxic to fish. Do not let the product enter the water body.

Molecular structure data

None

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP):


2. Number of hydrogen bond donors: 2


3. Number of hydrogen bond acceptors: 3


4. Number of rotatable chemical bonds: 1


5. Number of tautomers:


6. Topological molecular polar surface area (TPSA): 57.5


7. Number of heavy atoms: 10


8. Surface charge: 0


9. Complexity: 145


10. Number of isotope atoms: 0


11. Determine the number of atomic stereocenters: 0


12. The number of uncertain atomic stereocenters: 0


13. Determine the number of stereocenters of chemical bonds: 0


14. Uncertain number of chemical bond stereocenters: 0


15. Number of covalent bond units: 1

Properties and stability

Does not decompose under normal temperature and pressure. Avoid contact with oxidants.

Storage method

Stored in a cool, ventilated warehouse. Keep away from fire and heat sources. should be kept away from oxidizer, do not store together. Use explosion-proof lighting and ventilation facilities. It is prohibited to use mechanical equipment and equipment that are prone to sparks
Tools. The storage area should be equipped with emergency release equipment and suitable containment materials.

Synthesis method

After diazotization of aniline and Arsenous acid reaction is obtained.

Purpose

is used as an analytical reagent.

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