| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polypropylenic resin composition excellent in impact resistance at low temperatures. <P>SOLUTION: The polypropylenic resin composition has a melt flow rate of ≥5 g/10 min, and is obtained by melting and kneading a mixture containing: 75 to 99 wt.% of a propylenic copolymer composed of 60 to 90 wt.% of a polymer component (component (A)) which has a structural unit originated from propylene as a main structural unit and 10 to 40 wt.% of a polymer component (component (B)) which has a content of a structural unit originated from ethylene of 20 to 48 wt.%, wherein the component (B) has a limiting viscosity ([η]B) of ≥2.0 dL/g and the ratio of the limiting viscosity of the component (B) to the limiting viscosity ([η]A) of the component (A) is 1.3<[η]B/[η]A≤2.5; and 1 to 25 wt.% of an ethylene-α-olefinic copolymer which has a melt flow rate of 0.01 to 4.0 g/10 min, a density of 900 to 940 kg/m<SP POS="POST">3</SP>, a molecular weight distribution of ≥3, and an Ea of ≥50 kJ/mol. <P>COPYRIGHT: (C)2012,JPO&INPIT |
