High temperature vulcanized silicone rubber is high molecular weight polyorganosiloxane (i.e. raw rubber) added with reinforcing filler and other additives, using organic peroxide as vulcanizing agent, pressurized molding (molding, extrusion, calendering) or injection molding, and crosslinked into rubber at high temperature. This kind of rubber is generally referred to as silicone rubber.

The vulcanization of high temperature vulcanized silicone rubber is generally divided into two stages. The first stage is to mix raw silicone rubber, reinforcing agent, additive, vulcanizing agent and structure control agent, and then press, heat, form and vulcanize the mixture in the metal mold. The pressure is 50 kg / cm2, the temperature is 120 ~ 130 ℃, and the time is 10 ~ 30 minutes, The second stage is to take the silicone rubber out of the mold, put it into the oven and bake it at 200 ~ 250 ℃ for several hours to 24 hours. The rubber is further vulcanized and the organic peroxide is decomposed and volatilized.

The reinforcing filler of high temperature vulcanized silicone rubber is various types of silica, which can increase the strength of vulcanizate ten times. The main purpose of adding various additives is to reduce the cost of rubber, improve the properties of rubber and endow vulcanizates with various special properties, such as flame retardancy, conductivity and so on.