Since the introduction of a small amount of vinyl in the macromolecular structure of silicone rubber can greatly improve the vulcanization processing 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 plays a leading role in the production of silicone rubber at home and abroad. Because it introduces partially unsaturated vinyl groups on the side chain, its processing performance and physical and mechanical properties are better than two-base silicone rubber. In addition to the general characteristics of dimethyl silicone rubber, it also has a wide temperature range and can maintain good elasticity within a range of 60 to 260 ℃. It is easier to vulcanize than dimethyl silicone rubber and has a smaller permanent compression Deformation, good solvent resistance, high pressure steam resistance and excellent cold resistance, etc., and because of the use of less active peroxides for vulcanization, it reduces bubbles and poor rubber stability during vulcanization. weakness. Therefore, generally, methyl vinyl silicone rubber can be used to make products with larger thickness. 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, 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 insulating 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 reaction to the human body and is non-toxic, it is used for surgical plastic surgery, artificial heart valves, blood vessels, etc.