Patent ID: 6872776

Claim:
A vinyl chloride resin composition having excellent weatherability and impact resistance which comprises: (a) 100 parts by weight of a vinyl chloride resin, (b) 1-10 parts by weight of a graft copolymer which is obtained by polymerizing 25 to 75 parts by weight of a graft monomer component to 25 to 75 parts by weight of a crosslinked elastomeric polymer so that the total thereof is 100 parts by weight, and the methyl ethyl ketone-soluble portion of which has a reduced viscosity n sp /c, wherein n sp is specific viscosity and c is concentration of polymer in solvent in g/100 mL, of 1 to 5 measured at 30° C. with respect to its 0.2 g/100 cc acetone solution, said graft monomer component being composed of 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of at least one monomer selected from the group consisting of an alkyl acrylate having a C 1 to C 8 alkyl group, an alkyl methacrylate having a C 2 to C 6 alkyl group, an unsaturated nitrile and an aromatic vinyl compound, and said crosslinked elastomeric polymer being composed of 79.9 to 99.99% by weight of an alkyl acrylate having a C 2 to C 8 alkyl group, 0.01 to 5% by weight of a polyfunctional monomer and 0 to 20% by weight of other monomers copolymerizable therewith, said polyfunctional monomer being selected from the group consisting of an aromatic polyfunctional vinyl compound, a dimethacrylic acid ester of a polyhydric alcohol, an allyl ester of an unsaturated carboxylic acid, a diallyl compound and a triallyl compound, and said other monomers being selected from the group consisting of monomers having a single vinyl group, and (c) 10 to 30 parts by weight of calcium carbonate.