Vinyl chloride resin compositions

Claim 1

A vinyl chloride resin composition consisting essentially of a blend of 30 to 97 parts by weight of a vinyl chloride honro polymer or a copolymer derived from 70% or more vinyl chloride and 30% or less one or more monomers copolymerizable therewith and 3 to 70 parts by weight of a graft polymer prepared by graft polymerizing 80 to 20 parts by weight of a monomer mixture of 10 to 100% by weight alkyl methacrylate selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, tert-butyl methacrylate, and mixtures thereof; 0 to 80% by weight of a vinyl aromatic compound selected from the group consisting of styrene, vinyl toluene, alpha substituted styrene, benzene-(substituted) styrene and its derivatives, vinyl carbazole, vinylbiphenyl and mixtures thereof; and 0 to 35% by weight unsaturate nitrile selected from the group consisting of acrylonitrile and methacrylonitrile; onto a substrate polymer of alkyl acrylate selected from the group consisting of ethyl acrylate, propyl acrylate, n- butyl acrylate, isobutyl acrylate, pentyl acrylate, hexyl acrylate, n-octyl acrylate, 2-ethyl-hexyl acrylate and mixtures thereof and an allyl ester of vinyl or vinylidene unsaturated alpha-carboxylic acid selected from the group consisting of allyl acrylate, allyl methacrylate, monoallyl itaconate, diallyl itaconate and mixtures thereof, said substrate polymer being in an aqueous dispersion and said allyl ester being in an amount of 0.1 to 8% by weight of said substrate polymer and the particles size of said dispersion being between 0.05 to 0.2 microns and the gel content being at least 50%.