| 摘要 |
PROBLEM TO BE SOLVED: To obtain a tubular material, capable of retaining the mechanical strength, improving the flexibility and impact resistance at low temperatures and useful for a pipe materials, etc., in cold districts by blending a specific vinyl chloride-based graft copolymer with a specified amount of an acrylic processing aid and molding the resultant resin composition. SOLUTION: This tubular material excellent in flexibility and impact resistance is obtained by blending (A) 100 pts.wt. vinyl chloride-based graft copolymer, prepared by carrying the graft copolymerization of vinyl chloride with (A1 ) an ethylene-vinyl acetate copolymer having 20-40wt.% vinyl acetate content and having 20-60wt.% content of the component A1 (e.g. the one having 1,000-2,000 viscosity-average polymerization degree of the vinyl chloride resin component) with (B) 0.5-8 pts.wt. acrylate-based processing aid such as an alkyl (meth)acrylate polymer and molding the resultant resin composition. |
