Methyl phenyl vinyl silicone rubber is a product obtained by introducing methyl phenyl silicone chain links or diphenyl silicone chain links into the molecular chain of methyl vinyl silicone rubber. The introduction of phenyl groups on the side groups of the polysiloxane destroys the regularity of the dimethylsiloxane structure, greatly reduces the crystallization temperature of the polymer, and expands the low-temperature application range of the polymer material. Therefore, methyl phenyl vinyl silicone rubber has all the characteristics of methyl vinyl silicone rubber, such as small compression set, wide temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance and good electrical insulation properties, but also has excellent electrical insulation properties. Low temperature resistance, ablation resistance and radiation resistance. These properties vary with the content of phenyl in the molecular chain. Generally speaking, the content of phenyl (the ratio of phenyl to silicon atoms) is 5-10% It is sometimes called low phenyl silicone rubber. It has unique cold resistance and can maintain the elasticity of rubber at -70～-100℃. It is the best low-temperature performance of all rubbers. In addition, it also has methyl vinyl silicone. Rubber has advantages and low cost, so it has a tendency to replace methyl vinyl silicone rubber. When the phenyl content is 20-40%, it is called medium phenyl silicone rubber. It has excellent flame resistance and can self-extinguish once it catches fire. When the phenyl content is 40-50%, it is called high phenyl silicone rubber. It has excellent radiation resistance and γ-ray resistance is 1xI08 roentgen. Generally speaking, as the phenyl content increases, the rigidity of the silicone rubber molecular chain gradually increases, and the low temperature resistance of silicone rubber gradually decreases. However, as the phenyl content increases, the flame resistance and radiation resistance of the vulcanizate are improved. According to sex. Methylphenyl vinyl silicone rubber is one of the important materials in the aerospace industry, cutting-edge technology and other sectors of the national economy. It can be used to make various molded and extruded products as cold-resistant rubber in the aviation industry and for ablation resistance. Sealing rings, gaskets, pipes and bars for heat-aging or radiation-resistant parts.