| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene-ethylene block copolymer excellent in rigidity, hardness, moldability, toughness, low-temperature impact resistance, gloss and appearance, and its molded product. SOLUTION: The propylene-ethylene block copolymer contains 60-85 wt.% crystalline polypropylene moiety and 15-40 wt.% propylene-ethylene random copolymer moiety and satisfies the following (1) and (2). (1) The propylene-ethylene random copolymer moiety contains a propylene-ethylene random copolymer component (EP-A) having intrinsic viscosity of at least 0.5 dL/g and less than 8 dL/g and an ethylene content of at least 20 wt.% and less than 50 wt.% and a propylene-ethylene random copolymer component (EP-B) having intrinsic viscosity of at least 6 dL/g and less than 8 dL/g and an ethylene content of 50-80 wt.%. (2) The propylene-ethylene block copolymer has a melt flow rate of 5-120 g/10 min. The molded product thereof is also provided. COPYRIGHT: (C)2007,JPO&INPIT
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