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 propylene-ethylene block copolymer (A) 61% by weight, ethylene-butene-1 copolymer rubber (B) 14% by weight, ethylene-propylene copolymer rubber (C) 14% by weight, talc (D) ) 11% by weight, MFR of (A) is 58, [η] T is 1.4, EP content is 12% by weight, Q value of P part is 4, [η] P is 0.9, E [Η] EP of P part is 5.2, ethylene content is 32% by weight, Q value of (B) is 2.2, butene-1 content is 18% by weight, [Η] is 1.7, Mooney viscosity is 66, Q value of (C) is 2.3, polypropylene content is 27% by weight, Mooney viscosity is 88, average particle diameter of (D) is 2.1 μm, and MF R18, a thermoplastic resin composition having a flexural modulus of 14500, and an injection-molded article thereof. |