Vinyl chloride resin composition with processing aid

摘要

A composition comprising polyvinyl chloride and a novel polymer processing aid is provided. The polymer processing aid can be obtained either by blending in latex form an alkyl methacrylate copolymer (A) and a copolymer (B) comprising as its essential constituents an alkyl methacrylate, a dialkyl itaconate or an alkyl acrylate, and a diolefin, or by copolymerizing one of the copolymers in the presence of the other copolymer. The polymer processing aid thus obtained improves the processability of the vinyl chloride resin composition with less reduction in impact strength.