| 摘要 |
PURPOSE:To provide a propylene polymer composition excellent in surface hardness and scratching resistance and suitable for automobile bumper parts, etc. CONSTITUTION:With (A) 57-72wt.%, preferably 60-70wt.% propylene-based block copolymer containing 2-15mol% constituent unit derived from ethylene, containing 5-13wt.% portion soluble in n-decane at ordinary temperatures and showing 15-60 g/10 min melt flow rate, (B) 12-20wt.%, preferably 13-17wt.% ethylene-propylene-based rubber containing 70-90 mol% constituent unit derived from ethylene and showing 0.1-2 g/10 min melt flow rate, (C) 12-20wt.%, preferably 10-17wt.% ethylene.butene-1 copolymer rubber containing 85-95mol% constituent unit derived from ethylene and showing 1-10g/10min melt flow rate and (D) <7wt.% talc are blended. |
