LOW GLOSS POLYPROPYLENE-BASED RESIN COMPOSITION, LOW GLOSS MOLDED PRODUCT AND MATERIAL FOR AUTOMOBILE PART

摘要

PROBLEM TO BE SOLVED: To provide molded products which excel in rigidity, impact resistance and mar resistance with low gloss and is good in external appearance at the time of injection molding, and polypropylene-based resin compositions therefor. ;SOLUTION: Low gloss polypropylene-based resin compositions comprise (A) 30-70 wt.% polypropylene having a molecular weight distribution (Mw/Mn) of 4-8, (B) 5-25 wt.% polypropylene having a molecular weight distribution (Mw/Mn) of 15-23, (C) 2.0-10 wt.% polystyrene-ethylene/propylene-polystyrene triblock copolymer having a styrene content of 15-40 wt.% and an MFR of not greater than 0.2/10 min, (D) 5-20 wt.% ethylene-octene copolymer having an octene-1 content of 10-80 wt.%, (E) 15-25 wt.% talc having an average particle diameter of not greater than 5 μm, and (F) 2-10 wt.% particulate calcium carbonate having an average particle diameter of not greater than 5 μm.;COPYRIGHT: (C)2000,JPO