Liquidity, ethylene was excellent rigidity and impact strength - propylene block copolymer polypropylene resin composition

摘要

PROBLEM TO BE SOLVED: To provide a resin composition superior in fluidity and post-processability, easy in molding an injection produce of a large one and a thin film, and superior in rigidity and impact strength by an excellent characteristic of high crystalline polypropylene and an ethylene-propylene copolymer.;SOLUTION: This ethylene-propylene block copolymer-based polypropylene resin composition having a melt index of 80-120 g/10 min, includes (A) 80-95 mass% of high crystalline homo-polypropylene having an isotactic pentad fraction of 96% or more and (B) 5 to 20 mass% of an ethylene-propylene elastic copolymer having the mole ratio of ethylene/(ethylene + propylene) of 0.15-0.40, and includes 100 mass part of a polypropylene resin being 0.09-0.33 in the ratio (A/B) of absolute viscosity of high crystalline homo-polypropylene (A) to the ethylene-propylene elastic copolymer (B) and (C) 0.05-0.3 mass part of a nucleating agent.;COPYRIGHT: (C)2009,JPO&INPIT