Preparation method and application of organic silicon toughening agent

The invention relates to a preparation method and application of an organic silicon flexibilizer, and belongs to the technical field of polymer assistants.The organic silicon flexibilizer is prepared from raw materials including a cyclic siloxane monomer, polycaprolactone, diallyl maleate, amino-terminated polyethylene glycol, dodecylbenzene sulfonic acid and Tween 80, polyvinylpyrrolidone and pinoresinol are added in the raw material mixing process, and the organic silicon flexibilizer is prepared. The toughening effect of subsequent reaction products can be well improved, and the crack resistance is achieved; the preparation method comprises the following steps: mixing the raw materials with sodium dodecyl diphenyl ether disulfonate, methyl acrylate, sodium persulfate and cumene hydroperoxide to prepare a product, and compounding the product with hydroxy calcium phosphate, benzoyl peroxide, pinoresinol and ethyl methacrylate, so that the toughening agent obtained after the reaction has very good toughness,