BLENDS OF A RUBBER-MODIFIED VINYL CHLORIDE RESIN, AN UNMODIFIED VINYL CHLORIDE RESIN, AND A POLYMER OF A VINYL AROMATIC MONOMER AND AN UNSATURATED DICARBOXILYC ACID ANHYDRIDE MONOMER

摘要

A polyblend having a high resistance to distortion caused by heat and shock consists of 80 to 20% by weight of vinyl chloride resin, comprising from 90 to 30% by weight of a vinyl chloride resin-modified rubber and from 10 to 70% by weight of an unmodified vinyl chloride resin; 20 to 80% by weight of a polymer of a vinyl aromatic monomer such as styrene, an anhydride of the unsaturated dicarboxylic acid such as maleic anhydride, and optionally a third monomer such as acrylonitrile or methacrylate methyl, said polymer being a modified polymer rubber.