Silicone rubber according to its curing method is divided into high temperature vulcanized silicone rubber and room temperature vulcanized silicone rubber (RTV). Due to the low bonding strength and complex processing equipment of high temperature vulcanized silicone rubber adhesive, its application is greatly limited. Since the advent of RTV silicone rubber, the application of thermal curing silicone rubber as adhesive is gradually reduced. RTV silicone rubber is based on active linear polysiloxane with low molecular weight, and can cross link into three-dimensional network structure at room temperature with crosslinking agent and catalyst. According to the form of commodity packaging, it can be divided into one component and two component RTV silicone rubber. The former is the base compound, filler, crosslinking agent or catalyst in anhydrous conditions mixed evenly, sealed packaging, crosslinking reaction occurs in the atmosphere moisture.
The latter is the base compound and crosslinking agent or catalyst separate packaging, use according to a certain proportion of crosslinking, has nothing to do with environmental moisture. In addition to the general silicone products have oxidation resistance, high and low temperature alternating resistance, cold resistance, ozone resistance, excellent electrical insulation, physiological inertia, ablative resistance, moisture resistance and other excellent properties, room temperature vulcanized silicone rubber is the biggest characteristic is easy to use. By changing the structure of fillers, additives and polymers, especially by choosing a variety of cross-linking catalytic systems, many varieties with different properties can be prepared. At present, foreign sales of room temperature vulcanized silicone rubber brand more than 300 kinds.