Since the introduction of a small amount of vinyl into the macromolecular structure of silicone rubber can greatly improve the curing performance of silicone rubber, most of the currently used silicone rubbers contain vinyl. Methyl vinyl silicone rubber is the most common type of silicone rubber, and currently dominates the production of silicone rubber at home and abroad. Because it introduces partially unsaturated vinyl into the side chain, it has better processing and physical and mechanical properties than the two base silicone rubbers. In addition to the general characteristics of dimethyl silicone rubber, it also has a wide operating temperature range, which can maintain good elasticity in the range of 60 ~ 260 ℃, it is easier to vulcanize than dimethyl silicone rubber, and has less compression and permanent Deformation, good resistance to solvent expansion and high pressure steam stability, and excellent cold resistance, etc., and because less active peroxides are used for vulcanization, which reduces the occurrence of bubbles and poor rubber stability during vulcanization. weakness. Therefore, generally thick products can be made with methyl vinyl silicone rubber. 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. Most are based on vinyl silicone rubber, such as high-strength silicone rubber, Compression permanently deformed silicone rubber, post-vulcanized silicone rubber, heat-resistant conductive silicone rubber, medical silicone rubber, etc. In the aviation industry, methyl vinyl silicone rubber is widely used as a protective layer for gaskets, sealing materials and fragile and shock-proof parts; in the electrical industry, it can be used as high-level insulation materials such as electronic components, and dynamic sealing rings for high-temperature potentiometers. Sealing ring for underground long-distance communication equipment. In medicine, because methyl vinyl silicone rubber has a small physiological response to the human body and is non-toxic, it is used for surgical plastic surgery, artificial heart valves, blood vessels, etc.