Since the introduction of a small amount of vinyl groups into the macromolecular structure of silicone rubber can greatly improve the vulcanization processability of silicone rubber, most of the currently used silicone rubbers contain vinyl groups. Methyl vinyl silicone rubber is the most common type of silicone rubber and currently dominates the production of silicone rubber at home and abroad. Due to the introduction of a partially unsaturated vinyl group on the side chain, its processability and physical and mechanical properties are superior to those of two-base silicone rubber. In addition to the general characteristics of dimethyl silicone rubber, it also has a wide operating temperature range and can maintain good elasticity in the range of 60 to 260 ° C.



It is easier to vulcanize than dimethyl silicone rubber and has a smaller compression permanent Deformation, better solvent expansion resistance, high pressure steam resistance stability, and excellent cold resistance, etc., and because of the use of peroxides with lower activity for vulcanization, it reduces the generation of bubbles during vulcanization and poor rubber stability. weakness. Therefore, methyl vinyl silicone rubber can generally be used to make products with larger thicknesses. Methyl vinyl silicone rubber is the most widely used variety of silicone rubber. In recent years, various high-performance and special-purpose silicone rubbers have emerged, mostly based on vinyl silicone rubber, such as high-strength silicone rubber, low Compression set silicone rubber, no post-vulcanization silicone rubber, heat-resistant conductive silicone rubber and medical silicone rubber, etc.

In the aviation industry, methyl vinyl silicone rubber is widely used as gaskets, sealing materials and protective layers for fragile and shock-proof parts; in the electrical industry, it can be used as advanced insulating materials such as electronic components, dynamic sealing rings for high temperature potentiometers, Sealing ring for underground long-distance communication equipment; in medicine, because methyl vinyl silicone rubber has little physiological response to the human body and is non-toxic, it is used for surgical plastic surgery, artificial heart valves, blood vessels, etc.

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