| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition which is excellent in appearance, flexural modulus, tensile elongation, heat resistance, surface hardness and shock resistance and is suitable for injection moldings such as car interior parts items. SOLUTION: One hundred parts by weight of a resin composition comprising (A) 55-75wt.% of propylene-ethylene block copolymer, (B) 0-10wt.% of ethylene- propylene copolymer, (C) 5-15wt.% of ethyleneα-olefin copolymer rubber and (D) 15-25wt.% of tale are mixed with (E) 0.05-2 pts.wt. of a hindered amine of the formula (R is a hydrocarbon group of 3 or more carbon atoms such as an ester group) and (F) 0.01-1 pt.wt. of triaryl phosphite and (G) 0.05-4 pts.wt. of a metal salt of the formula: (RCOO)2 X (R is a monovalent hydrocarbon group with a molecular weight of 290-500; X is Zn, Mg, Ca) to provide a thermoplastic resin composition improved in mold staining.
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