Patent ID: 6204327
Filing Date: 2001-03-20
Classification: C08L

Abstract:
A vinyl chloride resin composition containinga graft copolymer (A) having an average particle diameter of at least 0.15 .mu.m, prepared by polymerizing 50 to 90% by weight of a solid matter of a rubber latex (a) having a glass transition temperature of at most 0.degree. C., the rubber latex (a) being prepared by polymerizing 50 to 100% by weight of butadiene and/or alkyl acrylate (a-1), 0 to 40% by weight of an aromatic vinyl monomer (a-2), 0 to 10% by weight of a vinyl monomer (a-3) capable of copolymerizing with the butadiene and/or alkyl acrylate (a-1) and the aromatic vinyl monomer (a-2), and 0 to 5% by weight of a polyfunctional monomer (a-4), with 10 to 50% by weight of a monomer mixture (b) comprising 10 to 100% by weight of an alkyl methacrylate (b-1), 0 to 90% by weight of an aromatic vinyl monomer (b-2), 0 to 25% by weight of a vinyl cyanide monomer (b-3) and 0 to 20% by weight of a vinyl monomer (b-4) capable of copolymerizing with the alkyl methacrylate (b-1), the aromatic vinyl monomer (b-2) and the vinyl cyanide monomer (b-3);a graft copolymer (B) having an average particle diameter of 0.05 to 0.13 .mu.m, prepared by polymerizing 50 to 90% by weight of a solid matter of a rubber latex (a') having a glass transition temperature of at most 0.degree. C., the rubber latex (a') being prepared by polymerizing 50 to 100% by weight of butadiene and/or alkyl acrylate (a'-1), 0 to 40% by weight of an aromatic vinyl monomer (a'-2), 0 to 10% by weight of a vinyl monomer (a'-3) capable of copolymerizing with the butadiene and/or alkyl acrylate (a'-1) and the aromatic vinyl monomer (a'-2), and 0 to 5% by weight of a polyfunctional monomer (a'-4), with 10 to 50% by weight of a monomer mixture (b') comprising 10 to 100% by weight of an alkyl methacrylate (b'-1), 0 to 90% by weight of an aromatic vinyl monomer (b'-2), 0 to 25% by weight of a vinyl cyanide monomer (b'-3) and 0 to 20% by weight of a vinyl monomer (b'-4) capable of copolymerizing with the alkyl methacrylate (b'-1), the aromatic vinyl monomer (b'-2) and the vinyl cyanide monomer (b'-3); anda vinyl chloride resin (C);wherein the proportion of the above graft copolymer (A) to the graft copolymer (B) (graft copolymer (A)/graft copolymer (B) (weight ratio)) is 50/50 to 95/5, and the proportion of the total amount of the above graft copolymer (A) and the graft copolymer (B) to the vinyl chloride resin (C) (total amount of graft copolymer (A) and graft copolymer (B)/vinyl chloride resin (C) (weight ratio)) is 1/99 to 30/70.