a. One component room temperature vulcanized silicone rubber vulcanization system with hydroxyl terminated silicone rubber can use silane containing hydrolyzable group as crosslinking agent. In the presence of condensation catalyst, the condensation reaction occurs and Si-O bond crosslinking is formed.

Types and characteristics of crosslinking agents for one component systems.

The vulcanization of one component system starts from the surface layer contacted by air, and gradually goes to the deep layer. Generally, the thickness of vulcanization layer is less than 1cm. In order to accelerate vulcanization and prepare thick layer products, magnesium oxide or layered construction can be added.

The commonly used crosslinking agents are ethyl orthosilicate (propyl ester), n-butyl titanate, methyltriethoxysilane or their partial hydrolytic condensates. Commonly used crosslinking catalysts include organometallic salts, such as dibutyldilaurate, dibutyldiacetic acid, octanoate, isooctanoate, lead octanoate, etc., and their sulfurization process (165 ~ 166 pages).

The dosage of crosslinking agent is generally 2 ~ 10 phr; The amount of catalyst is 0.1 ~ 5 phr. Examples of curing system formula: room temperature vulcanized silicone rubber 100 phr, dibutyl tin dilaurate 0.4 phr; 0 phr.