Patent ID: 6765060
Filing Date: 2004-07-20
Classification: C08L

Abstract:
A vinyl chloride-based resin composition characterized by mixing from 1 to 30% by weight of a graft copolymer composition and from 99 to 70% by weight of a vinyl chloride-base resin composition (C), wherein the sum total of both the compositions is 100% by weight, said graft copolymer composition comprising a mixture of a graft copolymer (A);(i) containing a rubbery polymer (aâ€²) in an amount of from 50 to 90% by weight obtained by polymerizing a monomers mixture (a) comprising from 50 to 100% by weight of a monomer (a-1) constituted of a butadiene monomer and an alkyl ester of acrylic acid monomer, from 0 to 50% by weight of an aromatic vinyl monomer (a-2), from 0 to 20% by weight of a vinyl monomer (a-3) copolymerizable with the monomer (a-1) and the monomer (a-2), and from 0 to 5% by weight of a non-conjugated multifunctional monomer (a-4); and having a glass transition temperature of not higher than 0Â° C.; (ii) containing polymer (bâ€²) in an amount of from 10 to 50% by weight obtained by polymerizing a monomer or mixture (b) comprising from 10 to 100% weight of a alkyl ester of methacrylic acid monomer (b-1), from 0 to 60% by weight of an alkyl ester of acrylic acid monomer (b-2), from 0 to 90% by weight of an aromatic monomer (b-3), from 0 to 25% by weight of a vinyl cyanide monomer (b-4), and from 0 to 20% by weight of a vinyl monomer (b-5) copolymerizable with the monomer (b-3) and the monomer (b-4); (wherein, the sum total of the rubbery polymer (aâ€²) and the polymer (bâ€²) is 100% by weight); and (iii) having a mean volume average particle size of at least 0.15 mm; said graft copolymer (A) being obtained by graft copolymerizing the monomer mixture (b) to the rubbery polymer (aâ€²) as the trunk polymer, and a graft copolymer (B); (i) containing the above-described rubbery polymer (aâ€²) in an amount of from 50 to 90% by weight; (ii) containing the above-described polymer (bâ€²) in an amount of from 10 to 50% by weight (wherein, the sum total of the rubbery polymer (aâ€²) and the polymer (b) is 100% by weight), and (iii) having a mean volume average particle size of from 0.03 to 0.13 mm; said graft copolymer (B) being obtained by graft copolymerizing the monomer mixture (b) to the rubbery polymer (aâ€²) as the trunk polymer; wherein the graft copolymer (A) contains at least 5% by weight and less than 50% by weight of the sum total amounts of the graft copolymer (A) and the graft copolymer (B).