Preparation method of polymer precursor bridged polysilsesquioxane silane-coupling agent

Abstract

The invention discloses a preparation method of a polymer precursor bridged polysilsesquioxane silane-coupling agent and relates to the field of chemical raw material preparation. The preparation method comprises the following steps of mixing a hydrogenous ring, allyl glycidyl ether and vinyltriethoxysiloxane to obtain a uniform mixture, dropwisely adding chloroplatinic acid as a catalyst into the mixture with stirring, carrying out a reaction process for 3h, heating the reaction system to a temperature of 80 DEG C, carrying out a reaction process for 3h to obtain a yellow transparent oily liquid, adding a dimethyl siloxane ring, trimethylolpropane diallylether and vinyltrimethoxysilane into the yellow transparent oily liquid, carrying out a reaction process at a temperature of 100 DEG C for 2h, adding titanium diisopropoxydiacetylethyl acetate into the reaction product, carrying out an aging reaction process for 4h and carrying out pressure-reduction removal of low-boiling point substances so that the product is obtained. The product has molecular weight larger than that of a common coupling agent and solves the problem that silane molecules unconsumed by a reaction in the crosslinking process are gradually transferred to the surface of the organosilicon crosslinked polymer. A large amount of the product does not influence the performances of the whole system.

Description

Technical field: [0001] The invention relates to the field of preparation of chemical raw materials, in particular to a method for preparing a silane coupling agent of polymer precursor bridged polysilsesquioxane. Background technique: [0002] Addition and crosslinking silicone elastomers are widely used, such as encapsulation and coating, impregnation of electric voice coils, bonding of mobile phone buttons, connection of semiconductor chips and circuit boards, connection of structural connections, bonding of films or fabrics, LED lamp packaging and many other fields. However, it is well known that silicone elastomers have low adhesion to plastics, metals and glass, and there are defects, and even automatic detachment from the substrate, which brings great troubles to industrial production and limits its application fields. [0003] Therefore, it is extremely important to improve the adhesion between silicone elastomer and substrate for its application. The methods are a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide the preparation method of the silane coupling agent of polymer precursor bridged polysilsesquioxane, its preparation method is simple, the product molecular weight that makes is bigger than common coupling agent, solves the problem of not being crosslinked The silane molecules consumed by the reaction will gradually migrate to the surface of the silicone cross-linked body, which can participate in the overall reaction of the system, and the large addition amount will not affect the performance of the entire system