Patent ID: 6686411
Filing Date: 2004-02-03
Classification: C08L

Abstract:
A vinyl chloride-based resin composition which comprises:(A) 100 parts by weight of a vinyl chloride-based resin; (B) from 1 to 30 parts by weight of a graft copolymer which is obtained by graft-polymerizing, in the presence of from 70 to 95 parts by weight of a crosslinked acrylic polymer (b-1), from 5 to 30 parts by weight of a vinyl monomer (b-2) while controlling the sum of (b-1) and (b-2) to 100 parts by weight; (C) from 0.1 to 5 parts by weight of a methyl methacrylate-based two stages polymer which is obtained by adding to a first polymer obtained by emulsion-polymerizing from 50 to 100 parts by weight of a monomer or a monomer mixture (c-1) comprising from 50 to 100% by weight of methyl methacrylate, from 0 to 50% by weight of a monomer selected from among alkyl methacrylates other than methyl methacrylate and alkyl acrylates, and from 0 to 20% by weight of a vinyl monomer copolymerizable therewith, while controlling the sum of the monomers to 100% by weight, and a solution of 0.1 g of said polymer in 100 ml of chloroform showing a specific viscosity of 0.7 or more at 30Â° C., from 0 to 50 parts by weight of a monomer or a monomer mixture (c-2) comprising from 0 to 50% by weight of methyl methacrylate, from 50 to 100% by weight of at least one monomer selected from the group consisting of alkyl methacrylates other than methyl methacrylate and alkyl acrylates and from 0 to 20% by weight of a vinyl monomer copolymerizable therewith, while controlling the sum of the monomers to 100% by weight, while controlling the sum of (c-1) and (c-2) to 100 parts by weight, and a solution of 0.1 g of said two stages polymer in 100 ml of chloroform showing a specific viscosity of 0.5 or more at 30Â° C.; and (D) from 1 to 20 parts by weight of calcium carbonate.