CHLORINATED VINYL CHLORIDE RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a chlorinated vinyl chloride resin composition which has a heat resistance attributed to a chlorinated vinyl chloride resin and an excellent processibility attributed to a vinyl chloride resin, and yields a molded product imparted with an excellent heat stability and impact resistance compared to conventional chlorinated vinyl chloride resins. SOLUTION: This composition comprises 100 pts.wt. chlorinated vinyl chloride resin, 3 to 20 pts.wt. calcium carbonate and 3 to 8 pts.wt. methyl methacrylate/ butadiene/styrene copolymer. Here, the chlorinated vinyl chloride resin is prepared by chlorinating two or more vinyl chloride resins which differ in their average degrees of polymerization which are 400 or larger but smaller than 800, wherein the difference between the maximum and minimum average degrees of polymerization is from 100 to 400.