Patent ID: 6730728
Filing Date: 2004-05-04
Classification: C08L

Abstract:
A polypropylene-based resin composition comprising the following components (A) to (D), characterized by its excellent moldability and other properties:50 to 70% by weight component (A): propylene/ethylene block copolymer having a melt flow rate (MFR) of 100 to 200 g//10 min., its propylene homopolymer component having an MFR of 210 to 400 g/10 min. and isotactic pentad fraction of 0.98 or more, and its copolymer portion containing propylene at 65 to 85% by weight; 10 to 25% by weight component (B): ethylene/octene and/or ethylene/butene random copolymer, containing the comonomers at 28% by weight or more for the copolymerization and having an MFR of 0.5 to 20 g/10 min.; 4 to 9% by weight component (C): styrene-based hydrogenated block copolymer rubber having the structure A-B or A-B-A wherein the segment A is a polystyrene structure and segment B is an ethylene/butene or ethylene/propylene structure, containing the segment A of polystyrene structure at 1 to 25% by weight; and 16 to 24% by weight component (D): talc, having an average particle size of 10 mm or less, determined by the laser-aided diffractometry.