There are mainly the following methods to improve the heat resistance of silicone rubber:

(1) Introducing special groups (such as phenyl) into the side chain of silicone rubber molecules to prevent oxidative degradation of side groups and thermal rearrangement degradation of the main chain;

(2) To improve the thermal stability of the crosslinked bond of the vulcanized rubber, large chain segments (such as phenyl, cyclodisilazane, cardecaboryl) were introduced into the main chain of the silicone rubber molecule.

(3) Heat resistant additives (such as SnO2, Fe2O3, etc.) are introduced into the glue formulation system to prevent the cyclic degradation of the main chain and oxidative cross-linking of the side chain. Among them, the introduction of heat-resistant additives into the formula system is the most commonly used and effective method.

Improving the flame retardancy of silicone rubber is generally considered from the following aspects:

(1) promote the formation of the barrier of the ceramic carbon silicon layer;

(2) Promote the cross-linking of silicone rubber at high temperature to form a stable structure;

(3) add inorganic filler, acting as flame retardant to reduce the surface temperature of combustion, improve thermal conductivity or form an air barrier layer to play a flame retardant role;

(4) Capture free radicals generated during combustion, and inhibit and slow down combustion;

(5) To prevent the unlocking degradation, reduce the release of combustible small molecules.