| abstract |
PURPOSE: To obtain a composition having excellent heat-resistance and fluidity and balanced physical properties, by compounding an α-methylstyrene- acrylonitrile copolymer, a specific graft copolymer and a vinyl chloride resin. n CONSTITUTION: The objective composition can be produced by compounding (A) a copolymer having a number-average molelcular weight of 15,000W80,000 and composed of 65W80(wt)% α-methylstyrene, 15W30% acrylonitrile and 0W30% copolymerizable monomer, (B) a graft copolymer obtained by the copolymerization of 20W70pts.(wt.) of a monomer mixture consisting of 50W80% styrene, 15W30% acrylonitrile and 0W30% other copolymerizable vinyl compound in the presence of 30W80pts. of a rubber having a glass transition temperature of ≤0°C, and (C) a vinyl chloide resin having a polymerization degree of ≤700. The amount of the component C is 90W20pts. per 10W80pts. of A+B, and that of the component B is 70W10% based on 30W90% of the component A. n COPYRIGHT: (C)1987,JPO&Japio |