| 摘要 |
PURPOSE:To obtain a resin composition excellent in heat resistance, impact resistance and mechanical strengths, by mixing a mixture of a vinyl chloride polymer with an alpha-methylstyrene/acrylonitrile copolymer with a graft polymer obtained by graft-polymerizing vinyl chloride in the presence of an ethylene/ methacrylate copolymer. CONSTITUTION:This thermoplastic resin composition has the following constitution. Namely, 100pts.wt. polymer mixture comprising 80-40pts.wt. vinyl chloride polymer and 20-60pts.wt. alpha-methylstyrene/acrylonitrile copolymer is mixed with 5-20pts.wt. graft polymer obtained by graft-polymerizing vinyl chloride or a monomer mixture based on vinyl chloride in the presence of an ethylene/ methacrylate copolymer of 80-20wt.% ethylene and 20-80wt.% methacrylate so that the content of the ethylene/methacrylate copolymer may be 30-80wt.%.
|
