VINYL CHLORIDE BASED RESIN COMPOSITION

PROBLEM TO BE SOLVED: To provide vinyl chloride based resin compositions which enable the improvement on the flowability and the external appearance of molded surfaces in the low-temperature molding using a vinyl chloride based resin, particularly a vinyl chloride based resin having a high average degree of polymerization without adversely affecting impact resistance. SOLUTION: Vinyl chloride based resin compositions comprise (A) 100 pts.wt. vinyl chloride based resin, (B) 1-30 pts.wt. graft copolymer obtained by graft polymerization of (c) at least one monomer selected from an aromatic alkenyl compound, a (meth)acrylic ester, and a vinyl cyanide compound onto a polyorganosiloxane composite rubber composed of (a) a polyorganosiloxane and (b) an alkyl (meth)acrylate rubber, and (C) 0.5-20 pts.wt. copolymer having, as the constituting unit, at least one monomer selected from an aromatic alkenyl compound, a (meth)acrylic ester, and a vinyl cyanide compound.