Methyl phenyl vinyl silicone rubber is a product obtained by introducing a methyl phenyl siloxane chain or a diphenyl siloxane chain into the molecular chain of the methyl vinyl silicon rubber.

The introduction of a phenyl group on the side group of polysiloxane, as the regularity of the dimethylsiloxane structure is destroyed, the crystallization temperature of the polymer is greatly reduced, and the low-temperature application range of the polymer material is expanded. Therefore, methylphenylvinyl silicone rubber has all the advantages of small compression set, wide temperature range, oxidation resistance, weather resistance, shock resistance, moisture resistance, and good 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, when the phenyl content (ratio of phenyl to silicon atom) is 5-10%, it is called low phenyl silicone rubber, which has unique cold resistance. Performance, can still maintain the elasticity of rubber at -70 ～ -100 ℃, it is the best low temperature performance of all rubbers. In addition, it has the advantages of methyl vinyl silicone rubber and the cost is not high. Base vinyl silicone rubber trend. When the phenyl content is 20 to 40%, it is said that the medium phenyl silicone rubber has the advantages of methyl vinyl silicone rubber and the cost is not high, so there is a great tendency to replace methyl vinyl silicone rubber. When the phenyl content is 20 to 40%, it is called medium phenyl silicone rubber. It has excellent flame resistance and can self-extinguish when 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, with the increase of the phenyl content, the rigidity of the silicone rubber molecular chain gradually increases, and the low temperature resistance of the silicone rubber gradually decreases, but with the increase of the phenyl content, Improved flame resistance and radiation resistance of vulcanizates.

Methyl phenyl vinyl silicone rubber is one of the important materials for the aerospace industry, cutting-edge technology and other sectors of the national economy. It can be used to make various molded and extruded products for cold-resistant rubber in the aviation industry and for ablation resistance, Seals, gaskets, pipes and rods in heat-resistant or radiation-resistant areas.