Liquid silicone related instructions

Liquid silica gel is a kind of solid high-temperature vulcanized silicone rubber. It is a liquid glue with good fluidity, fast vulcanization, safer and environmental protection, and can completely meet the requirements of food grade. According to the position of the functional groups contained in the molecular structure, liquid rubbers with functional groups are often divided into two categories: one is called teleclaw liquid rubber with functional groups at both ends of the molecular structure; the other is active functional groups in the main chain It is randomly distributed, that is, the so-called functional rubber in the molecular structure is called non-remote claw type liquid rubber.

Liquid silicone rubber can be used for coating, impregnation and infusion. Such as hydroxyl-terminated polydimethylsiloxane with a viscosity of 0.07 ~ 50 Pa · s / 25 ° C, methyl vinylbispyrrolidone silane is used as a chain extender, and organic peroxide is used. This compound has good fluidity. , Low viscosity, chain growth reaction occurs simultaneously during its vulcanization process, so high molecular weight elastomers can be obtained, with good physical and mechanical properties. The chain extender methyl vinylbispyrrolidone silane can be obtained by the reaction of pyrrolidone and methyl vinyl dichlorosilane in the presence of triethylamine. The product is easily hydrolyzed, so it needs to be stored in a dry and closed container. The pyrrolidone of this compound The group can react slowly with the terminal hydroxyl group in the polydimethylsiloxane at room temperature, and the reaction rate increases with the temperature.

Liquid silicone rubber for silicone leather，pls check MY 2271