| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition excellent in moldability, having well-balanced mechanical properties, and useful as an internal trim material/facing material etc., containing an ethylene-propylene block copolymer having specific physical properties. SOLUTION: This thermoplastic resin composition comprises (A) 30-80wt.% of an ethylene-propylene block copolymer 30-200g/10min in melt flow rate (hereafter abbreviated as MFR) composed of (i) 80-98wt.% of crystalline propylene polymer segment and (ii) 2-20wt.% of ethylene-propylene copolymer segment 25-80wt.% in ethylene content and 3-7dL/g in intrinsic viscosity, (B) 10-30wt.% of a styrene-based block copolymer elastomer of formula I or formula II (PS is a polystyrene block; PEB is a polyethylene-butene block; (m)>=1) with a MFR of 0.5-40g/10min and a PS portion content of 10-30wt.%, and (C) 10-40wt.% talc <=5μm in average particle size.
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