Methyl vinyl silicone rubber is non-toxic
Methyl vinyl silicone rubber, abbreviated as vinyl silicone rubber, is a copolymer of dimethyl siloxane and a small amount of vinyl siloxane. The vinyl content is generally 0.0.3mol%. The introduction of a small amount of unsaturated vinyl groups greatly improves its vulcanization process and product performance, especially its heat aging resistance and high-temperature compression deformation resistance The content of methyl vinyl siloxane units has a significant impact on vulcanization and the heat resistance of vulcanized rubber. If the content is too low, the effect is not significant. If the content is too high (up to 0.5mo1%), it will reduce the heat resistance of vulcanized rubber
Performance and Application of Silicone Rubber
1. Excellent resistance to high and low temperatures The working temperature range is -100~350 ℃
2. Excellent resistance to ozone aging, oxygen aging, light aging, and weather aging Silicone rubber vulcanized rubber has no change in performance after being placed outdoors for several years in a free state
3. Excellent electrical insulation performance The electrical insulation performance of silicone rubber vulcanized rubber changes little when it is damp, frequency changes, or temperature increases. The silicon dioxide generated after combustion is still an insulator. In addition, the molecular structure of silicone rubber has fewer carbon atoms and does not use carbon black as a filler, so it is not easy to burn during arc discharge. Therefore, it is very reliable for use in high-voltage applications Its corona resistance and arc resistance are extremely good, with a corona resistance life 1000 times that of polytetrafluoroethylene and an arc resistance life 20 times that of fluororubber
4. Special surface properties and physiological inertness. The surface energy of silicone rubber is lower than most organic materials, therefore, it has low moisture absorption. When immersed in water for a long time, its water absorption rate is only about 1%, and its physical and mechanical properties do not decrease. It has good anti mold performance; In addition, many of its materials are non stick and can serve as a barrier Silicone rubber is odorless, non-toxic, and has no adverse effects on the human body. It has a slight reaction with body tissues and has excellent physiological inertia and aging properties
Compared with other polymer materials, high permeability silicone rubber has extremely superior breathability. Its permeability to nitrogen, oxygen, and air at room temperature is 30-40 times higher than that of natural rubber. In addition, it also has selective gas permeability, with significant differences in permeability to different gases (such as oxygen, nitrogen, and carbon dioxide). For example, its permeability to oxygen is about twice that of nitrogen, and its permeability to carbon dioxide is about 5 times that of oxygen
Silicone rubber has unique comprehensive properties, which enable it to be successfully used in situations where other rubbers are ineffective, solving many technical problems and meeting various needs of modern industry and daily life Silicone rubber can be used for automotive parts, electronic components, aerospace sealing products, bonding joints in the construction industry, household appliance sealing rings, medical artificial organs, urinary catheters, etc