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Application of dibutyltin dilaurate in polyvinyl chloride

7月 19th, 2024 News

Dibutyltin Dilaurate (DBTDL), as an important organotin compound, is used in many fields due to its excellent properties It has found applications in the polyvinyl chloride (Polyvinyl Chloride, PVC) industry, where it plays a key role. PVC is a widely used thermoplastic favored for its cost-effectiveness, durability and versatility. However, PVC is prone to degradation during processing and use, especially thermal degradation, which limits its application scope. In order to overcome this problem, the addition of stabilizers becomes crucial, and dibutyltin dilaurate is one of the most efficient PVC heat stabilizers.

Application in polyvinyl chloride

Thermal Stabilization

PVC easily decomposes at high temperatures to produce HCl, which not only reduces the physical properties of the product, but also accelerates further degradation processes. Dibutyltin dilaurate can effectively capture and neutralize the generated HCl, preventing it from further attacking the PVC chain, thereby inhibiting the thermal degradation process and improving the thermal stability of PVC. This stabilizing effect enables PVC products to maintain their original properties and extend their service life during processing and use.

Increase transparency

In soft and semi-soft PVC products, such as transparent films, pipes, artificial leather, etc., dibutyltin dilaurate can not only provide thermal stability, but also maintain or improve the transparency of the product. This is important for applications that require good visual effects, such as packaging and decorative materials.

Lubricity and processability

In addition to being a stabilizer, dibutyltin dilaurate also has good lubricity, which can improve the fluidity of PVC during extrusion, injection molding and other processing processes, reduce friction, make processing smoother, reduce energy consumption, and improve Productivity.

Weather resistance

PVC products used outdoors, such as window frames, fences, etc., need to withstand the effects of environmental factors such as ultraviolet rays and temperature changes. Dibutyltin dilaurate can enhance the weather resistance of PVC, allowing it to maintain good appearance and mechanical properties under harsh conditions.

Catalysis

In addition to its application in PVC, dibutyltin dilaurate is also an effective catalyst and can be used in the vulcanization process of polyurethane foam synthesis, polyester synthesis and room temperature vulcanization silicone rubber. In these polymerization reactions, it can promote the reaction rate and control the reaction process to obtain high-quality products.

Conclusion

In summary, the application of dibutyltin dilaurate in the polyvinyl chloride industry is very extensive and important. Whether it is improving thermal stability, enhancing transparency, improving processability, or improving weather resistance, it plays an indispensable role. However, it is worth noting that despite the many advantages of dibutyltin dilaurate, its potential impact on human health and the environment cannot be ignored. Therefore, when using this compound, it is necessary to strictly abide by relevant safety regulations, take appropriate protective measures, and explore and develop more environmentally friendly alternatives to achieve sustainable development.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Dibutyltin dilaurate substitute

7月 19th, 2024 News

Dibutyltin dilaurate (DBTDL) is a widely used polyvinyl chloride (PVC) stabilizer, polyurethane (PU) catalyst, and Highly efficient organotin compounds in organic synthesis. However, due to its possible negative effects on human health and the environment, including reproductive toxicity, bioaccumulation, and potential harm to ecosystems, the search for safer and more environmentally friendly alternatives has become an important topic in the fields of chemistry and materials science. Below are several dibutyltin dilaurate alternatives and their characteristics.

1. Organobismuth catalyst

Organobismtium catalysts are a type of non-toxic and environmentally friendly catalysts that have been much studied in recent years. Their application in polyurethane synthesis shows similar or even better catalytic activity than dibutyltin dilaurate. Organobismtium catalysts are usually based on bismuth acetate, bismuth acetylacetonate, etc. Through appropriate ligand modification, their catalytic activity and selectivity can be adjusted, while avoiding the environmental and health problems caused by organotin catalysts.

2. Zinc salts and zinc complexes

Zinc salts, such as zinc acetate, zinc stearate, etc., have also been developed as alternatives to dibutyltin dilaurate. Zinc salts have shown good performance in PVC stabilizers and PU catalysts. They can effectively inhibit the generation of HCl, prevent thermal degradation of PVC, and have low toxicity. In addition, zinc complexes, such as zinc soaps, also show good thermal stability and UV resistance.

3. Organic amine catalyst

Organic amine compounds, such as dimethylcyclohexylamine (DMCHA), N,N-dimethylbenzylamine (DMBA), etc., as catalysts for polyurethane synthesis, have fast reaction rates and high selectivity. . Although their catalytic efficiency may be slightly lower than organotin catalysts, in some applications comparable results can be achieved by adjusting the formulation.

4. Titanate catalyst

Titanate catalysts, such as titanium tetrabutoxide, can be used as catalysts in polyurethane synthesis. They have high catalytic activity at high temperatures and have certain thermal stability. One advantage of titanate catalysts is that they can provide longer open times in some cases, which facilitates mixing and processing of multi-component polyurethane systems.

5. Environmentally friendly PVC heat stabilizer

In addition to the substitution of the above catalysts, environmentally friendly stabilizers for PVC thermal stability are also constantly developing, such as calcium-zinc composite stabilizers, organotin alternative stabilizers (such as SICAT-03), etc., which are designed to reduce or Eliminate the use of traditional organotin stabilizers while maintaining or improving the performance of PVC products.

Conclusion

Looking for alternatives to dibutyltin dilaurate is a multidisciplinary research field involving chemistry, materials science, environmental science, etc. aspect. As the global awareness of environmental protection increases and various countries’ regulations on the use of hazardous substances become increasingly strict, the development of new, low-toxic, and environmentally friendly catalysts and stabilizers will become a future development trend. Enterprises, scientific research institutions and governments should work together to promote the development of green chemical technologies to achieve the goals of sustainable production and consumption.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Dibutyltin dilaurate environmental regulations

7月 19th, 2024 News

Dibutyltin dilaurate (DBTDL), as an organotin compound, is widely used in many industrial fields due to its efficient catalytic properties, especially in polyurethane (PU) foam manufacturing, polyvinyl chloride (PVC) ) heat stabilizer and in organic synthesis. However, the use of dibutyltin dilaurate is not without controversy, and its potential effects on the environment and human health have raised global concerns. Therefore, many countries and regions have enacted a series of environmental regulations aimed at limiting or prohibiting the use of this compound to protect the ecological environment and public health.

EU REACH Regulation
The EU’s Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) regulations are one of the world’s comprehensive chemicals management frameworks. REACH requires manufacturers and importers to register the chemicals they produce and provide detailed chemical safety assessments. For dibutyltin dilaurate, REACH classifies it as a substance of very high concern (SVHC) and imposes strict restrictions on its use. In some applications, such as direct food contact items or children’s toys, the use of dibutyltin dilaurate has been completely banned. In addition, the EU also requires products containing dibutyltin dilaurate to be authorized and only allowed to be used when there are no viable alternatives.

U.S. Environmental Protection Agency (EPA) Regulations
The U.S. Environmental Protection Agency (EPA) also regulates the use of dibutyltin dilaurate. Under the Toxic Substances Control Act (TSCA), the EPA has the authority to evaluate and restrict the use of chemicals to protect the public from potential health risks. The EPA has conducted risk assessments of organotin compounds, including dibutyltin dilaurate, and has taken steps to limit their use in certain products, particularly those that may pose a risk of exposure to children and sensitive populations.

Other country regulations
In addition to the European Union and the United States, other countries and regions have also introduced their own regulations to control the use of dibutyltin dilaurate. For example, Canada includes it in the list of hazardous substances under the Canadian Environmental Protection Act (CEPA); Japan regulates it through the Chemical Substances Evaluation and Manufacturing Restriction Act (CMR); Australia passes the Industrial Chemicals Act ( IC Act) restricts its use.

International Convention
At the international level, the Stockholm Convention is concerned about persistent organic pollutants (POPs). Although dibutyltin dilaurate is not currently included in the POPs list, its similar organotin compounds, such as tributyltin, have been restricted by the convention. This shows that the international community is gradually recognizing the long-term impact of organotin compounds on the environment, and may adopt stricter control measures on the use of dibutyltin dilaurate in the future.

Industry self-regulation
In addition to government-level regulations, many industry organizations and companies have also begun to proactively reduce or eliminate the use of dibutyltin dilaurate and instead look for more environmentally friendly and safer alternatives. This trend of self-regulation not only responds to regulatory requirements, but also reflects corporate social responsibility, helping to enhance brand image and market competitiveness.

Conclusion
Regulations around the world are increasingly restricting the use of dibutyltin dilaurate due to the risks it poses to the environment and human health. These regulations not only reflect the importance of public health and environmental protection, but also promote the development of the chemical industry in a greener and more sustainable direction. Enterprises should pay close attention to changes in relevant regulations, adjust production strategies in a timely manner to ensure compliance with new environmental standards, and at the same time actively develop and adopt more environmentally friendly chemicals to meet future challenges.
Further reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

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