Vinyl chloride resin composition.

摘要

A vinyl chloride resin composition having an improved impact resistance with a good transparency which comprises (A) a graft copolymer reinforcing agent prepared by emulsion-polmerizing 15 to 35 parts by weight of a monomer mixture in the presence of 85 to 65 parts by weight of a butadiene homopolymer or copolymer having a butadiene content as high as 82 % by weight or more, said monomer mixture consisting of 50 to 95 % by weight of an aromatic vinyl monomer such as styrene, 0.1 to 40 % by weight of a vinyl cyanide monomer such as acrylonitrile and 0 to 40 % by weight of other vinyl monomer copolymerizable therewith, and (B) a vinyl chloride resin. The butadiene homo- or copolymer may be treated prior to the emulsion polymerization, in order to prevent the produced graft copolymer particles from coagulating into a massive material, by reacting a small amount of a crosslinking monomer and optionally an alkyl acrylate or methacrylate in the presence of the butadiene homo- or copolymer in the form of an aqueous latex.