High-purity dimethyltin dilaurate (DBTM), as a type of efficient organotin catalyst, plays an important role in the formulation design of rubber products. A pivotal role. Especially in the synthesis and processing of special rubber products such as silicone rubber, acrylic rubber and carboxyl rubber, its unique catalytic performance and stability provide strong support for improving product performance and production efficiency. This article will delve into the application principles, advantages, usage techniques and precautions of high-purity dimethyltin dilaurate in rubber product formulations.
Application Principle
The main function of high-purity dimethyltin dilaurate is to promote the cross-linking reaction between rubber molecular chains, accelerate the rubber vulcanization process through catalysis, and ensure that rubber products obtain ideal physical properties, such as increasing tensile strength, tearing, etc. cracking strength and wear resistance. In the production process of room temperature vulcanized rubber (RTV) and hot vulcanized rubber, it can effectively shorten the vulcanization time and reduce energy consumption, while ensuring that the surface of rubber products is smooth and defect-free, improving the overall quality and processing efficiency of the product.
Advantage analysis
- Efficient Catalysis: DBTM has excellent catalytic activity and can effectively promote the cross-linking of rubber even at low concentrations, reducing the amount of catalyst used and thus reducing costs.
- Improve physical properties: By precisely controlling the cross-linking density, high-purity DBTM can significantly improve the mechanical properties of rubber products, such as enhancing its elasticity, hardness and heat resistance.
- Improve processability: During the rubber mixing and vulcanization process, DBTM can improve filler dispersion, reduce processing difficulty, and make the product more uniform and dense.
- Environmentally compatible: Compared with other traditional catalysts, high-purity DBTM releases less harmful substances during use, which is in line with the trend of modern rubber products developing in a green and environmentally friendly direction.
Tips
- Accurate measurement: Due to the high catalytic efficiency of DBTM, excessive use may lead to premature vulcanization or excessive cross-linking, which affects the performance of the product. Therefore, accurate measurement is required, usually the dosage is 0.1%-1%. between.
- Mix evenly: DBTM should be added at the early stage of rubber mixing to ensure that it is fully mixed with the rubber base material and other additives to achieve uniform distribution and exert catalytic effect.
- Temperature control: During the vulcanization process, reasonable control of temperature and pressure can enhance the catalytic effect of DBTM and avoid catalyst decomposition or failure due to excessive temperature.
- Formulation optimization: According to the requirements of different types of rubber and products, the formula needs to be adjusted, and may need to be used in conjunction with other catalysts or additives to achieve optimal performance.
Notes
- Safety Protection: Although high-purity DBTM is relatively stable, you still need to wear appropriate personal protective equipment when handling it , such as protective glasses, gloves and masks, to avoid direct contact with skin and inhalation of vapor.
- Environmental management: Considering the potential impact of organotin compounds on the environment, post-use waste should be collected and disposed of in accordance with hazardous chemical disposal regulations to avoid contaminating water sources and soil.
- Compliance inspection: As environmental regulations become increasingly strict, it is necessary to confirm whether the product complies with local and international environmental regulations before use, such as the EU REACH regulations.
In summary, the application of high-purity dimethyltin dilaurate in rubber product formulations not only improves product performance and production It is efficient and conforms to the trend of environmental protection, but its use requires strict control of dosage and attention to safety and environmental protection requirements to achieve economic and social benefits.
Extended reading:
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