VINYL CHLORIDE-BASED POLYMER COMPOSITION AND MOLDED PRODUCT MOLDED FROM THE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a vinyl chloride-based polymer composition having excellent toughness at a fracture mode such as crack growth properties in long-time use while keeping the high modulus peculiar to a vinyl chloride-based polymer without damaging characteristics of tensile elongation. SOLUTION: The vinyl chloride-based polymer composition is obtained by dispersing a swelling phyllosilicate and a vinyl acetate-ethylene-based copolymer in a vinyl chloride-based polymer, and satisfies the following conditions: (A) the vinyl chloride-based polymer has≥600 average degree of polymerization; (B) the swelling phyllosilicate dispersed in the composition has 0.5-100 nm average layer thickness, and≥5 average aspect ratio (ratio of the length of the layer to the thickness of the layer); (C) the vinyl acetate-ethylene-based copolymer dispersed in the composition has a particle shape having 10-1,000 nm average diameter; and (D) a part or the whole of the swelling phyllosilicate has a shape dispersed in the vinyl acetate-ethylene-based copolymer particles. COPYRIGHT: (C)2005,JPO&NCIPI