Silicone rubber vulcanization system
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(1) Vulcanization system of heat vulcanized silicone rubber
Organic peroxides for silicone rubber can be divided into two types: general purpose type and special purpose type. The former has higher activity and can cure all kinds of silicone rubber, while the latter has lower activity and can only cure vinyl silicone rubber.
The curing agent DTBP is easy to volatilize (boiling point 110 β), and it is suitable for molecular sieve adsorption function. It will not react with air or carbon black. It can be applied to conductive rubber and products difficult to mold.
DCP is a special vinyl curing agent with low volatile decomposition products, which is suitable for curing under low external pressure.
The decomposition time of various peroxides in silicone rubber at 140 β.
