| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a resin composition that is superior in balance between toughness and flowability. <P>SOLUTION: The composition comprises 20-80 wt.% polymer (A1), 5-55 wt.% polymer (A2), and 10-50 wt.% copolymer (B), wherein the MFR of the composition, measured with a load of 2.16 kg at 230°C, is 20 g/10 min or more, the polymer (A1) being a propylene polymer having an intrinsic viscosity of from 0.5 dl/g to less than 2.0 dl/g, a molecular weight distribution of less than 3.0, and a content of propylene-derived structural units of 90 wt.% or more, the polymer (A2) being a propylene polymer having an intrinsic viscosity of from 2.0 to at most 7.0 dl/g, a molecular weight distribution of 3.0 or more, and a content of propylene-derived structural units of 90 wt.% or more, and the copolymer (B) being a copolymer of ethylene with propylene or a C4-20 α-olefin, having a content of ethylene-derived structural units of 20 to 80 wt.%. <P>COPYRIGHT: (C)2013,JPO&INPIT |
