thermoplastharzzusammensetzung with reduced tendency to giessformverschmutzung

摘要

A thermoplastic resin composition improved in terms of prevention of mold contamination, comprising the following components (A) to (G): component (A): 55 to 75% by weight of a propylene-ethylene block copolymer including a propylene homopolymer moiety having a melt flow rate of 15 to 50 g/10 min. and an isotactic pentad fraction of at least 0.97, said block copolymer having a melt flow rate of 10 to 30 g/10 min. and an ethylene content of 2 to 6% by weight, component (B): 0 to 10% by weight of an ethylene-propylene copolymer rubber having a melting temperature of 30 to 60 DEG C and a melt flow rate of 0.2 to 2 g/10 min., component (C): 5 to 15% by weight of an ethylene- alpha -olefin copolymer rubber having a melting temperature of 60 to 100 DEG C and a melt flow rate of 0.3 to 2 g/10 min., component (D): 15 to 25% by weight of a talc having an average particle diameter of up to 5 mu m and a specific surface area of at least 3.5 m2/g, the total amount of components (A) to (D) being 100% by weight, component (E): 0.05 to 2 parts by weight of a hindered amine having a structure represented by the following formula (I): CHEM component (F): 0.01 to 1 part by weight of a triaryl phosphite, and component (G): 0.05 to 4 parts by weight of a metal salt represented by the following general formula (VIII): (RCOO)2X wherein R is a monovalent hydrocarbon group having a molecular weight of 290 to 500, and X is zinc, magnesium or calcium, the respective amounts of components (E) to (G) being based on 100 parts by weight of the sum of components (A) to (D).