Application effects of the condensation reaction of methyl phenyl silicone resin catalyzed, nucleophilic reaction catalytic properties make the choice of the molecular chain of the methyl phenyl silicone glycol phenyl replace position is first activated, the resulting in silicon hydroxyl ahead of methyl phenyl replace position replace the position of the silicon hydroxyl condensation reaction, formation of methyl phenyl silicone polymer chains, This leaves part of the silicon hydroxyl group in the polymer where the methyl group is substituted. In the curing process of silicone resin, the reactivity of methyl substituted silica hydroxyl group is obviously higher than that of phenyl group corresponding silica hydroxyl group, so the high reactivity of methyl phenyl silicone resin is obtained. The retention of a large proportion of silicon hydroxyl groups with low steric hindrance and high reactive active methyl substituted positions in silicone polymers improves the adhesion of the cured silicone to the substrate.
Another function of the special catalyst is to catalyze the ring-opening reaction in the condensation polymerization process. The inert silicone-macrocyclic and cage-type polymers generated in the hydrolysis process of organochlorosilane also participate in the condensation polymerization with ring opening under the action of special catalyst, which eliminates the inert macrocyclic and cage-type polymers, thus completely solving the fundamental defect that the thermal condensation silicone resin is easy to return to adhesion after curing. At the same time, the special catalyst promotes the inert ring or cage type oligomer to participate in the polymerization reaction, which is also beneficial to the precise control of the composition of silicone and improve the yield of the product.