Silicone rubber can be divided into thermal vulcanization type (high temperature vulcanized silica gel HTV) and room temperature vulcanization type (RTV) according to its vulcanization mechanism. Among them, room temperature vulcanization type is divided into polycondensation reaction type and addition reaction type. High temperature silicone rubber is mainly used to make various silicone rubber products, while room temperature silicone rubber is mainly used as an adhesive, potting material or mold. Heat vulcanization type has the largest amount, heat vulcanization type is divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, the largest amount and product brand), methyl vinyl phenyl silicone rubber PVMQ (low temperature resistance, radiation resistance ), Others are eye silicone rubber, fluorosilicone rubber and so on.