| abstract |
(57) [Abstract] [PROBLEMS] To provide a thermoplastic resin composition having high low-temperature impact strength, rigidity, Rockwell hardness, and a small linear expansion coefficient, and an injection molded article thereof. [Structure] Crystalline polypropylene (A): 50-75% by weight, ethylene-butene-1 copolymer rubber (B): 15- 35% by weight, talc (C): 5 to 20% by weight, Butene-1 of ethylene-butene-1 copolymer rubber (B) The content is 20 to 30% by weight, the intrinsic viscosity in a 70 ° C. xylene solution is 1.1 to 2.0 (dl / g), the Mooney viscosity ML 1 + 100 at 100 ° C. is 10 to 40, and the talc (C) is A thermoplastic resin composition and an injection-molded article thereof, which have an average particle diameter of 4 μm or less and a total amount of (B) and (C) of 30% by weight or more. |