Preparation method of high-impact polyacrylate grafting vinyl chloride emulsion copolymer resin

The invention relates to the technical field of vinyl chloride resin, in particular to a preparation method of high-impact polyacrylate grafting vinyl chloride emulsion copolymer resin. A single emulsifier and a single initiator are adopted by the original synthesis process, and tests proof that the single emulsifier can enable polymer latex not to be stable, and therefore, a stable polymerization product can not be obtained; the single initiator enables a polymerization system not to be stable, and reaction is difficult to control; freezing demulsification, filtering, washing, drying and thelike are adopted as treatment processes of a vinyl chloride grafting copolymer emulsion to form a thick and big aggregated particle structure, and the product performance is low; moreover, much wastewater and many waste residues are generated in the process. In the invention, the stability of the latex is ensured by adopting a compound emulsifier and a compound initiator, which ensures that the latex has better average pa