From the above three kinds of silicone resin can be seen: silicon atoms connected to the type of organic groups have a great impact on the performance of the resin, when methyl, can give silicone resin thermal stability, demoulding, hydrophobicity, arc resistance; Is phenyl, endowing the resin oxidation stability, it can destroy the crystallization of the polymer in a certain range; When it is vinyl, it can improve the curing properties of silicone resin and bring coupling; When it is tetrachlorobenzene, it can improve the lubricity of the polymer; When it is phenyl ethyl group, the miscibility of silicone resin and organic matter can be improved. When it is ammonia propyl, it can improve the solubility of the polymer and bring coupling. The hydrophobicity of silicone resin can be improved when it is amyl group. Therefore, different organic groups can be introduced into the preparation process of silicone resin.
In order to improve the adhesion of silicone resins, silicone resins can be copolymerized with polyester, epoxy, phenolic, etc. Silicone-polyester copolymer can be prepared by condensation reaction of polyester containing hydroxyl and silane containing alkoxy group (or siloxane), or silane containing silicon hydroxyl group (or siloxane).
There are many ways to synthesize organosilicone - epoxy copolymer, but most of them are based on commercial epoxy resin as raw material, according to different requirements, choose appropriate varieties and low molecular weight organosilicone resin containing alkoxy group or hydroxyl group for copolycondensation reaction to prepare copolymer.
Silicone - phenolic copolymers can also be prepared by copolycondensation of soluble silicone resin with phenolic resin, or by copolycondensation of organic acetylsilane with low molecular weight phenolic resin.