| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene polymer composition having well-balanced impact resistance and hardness and excellent rigidity and toughness. SOLUTION: This propylene polymer composition is composed of (A) 40-90 wt.% of a propylene polymer having an MFR(melt flow rate)(230 deg.C, 2.16 kg load) of 0.1-1,000 g/10 min and composed of 0.1-20 wt.% of a component soluble in decane at 64 deg.C and 99.9-80 wt.% of a component insoluble in decane at 64 deg.C and having a pentad isotacticity of 0.96-0.99, (B) 5-35 wt.% of an ethylene.α- olefin copolymer composition composed of 100 pts.wt. of a copolymer of ethylene and a 4-20Cα-olefin, having a density of 0.860-0.900 g/cm<3> and a melt flow rate of 0.05-50 g/10 min (190 deg.C, 2.16 kg load) and satisfying the formula Tm<400×d-250, (in the formula, Tm is the maximum peak temperature of an endothermic curve measured by a differential scanning calorimeter and (d) is density) and 0.001-5 pts.wt. of a crystal nucleation agent and (C) 5-25 wt.% of an inorganic filler. |
