POLYPROPYLENE-BASED RESIN COMPOSITION FOR AUTOMOBILE PARTS, AND AUTOMOBILE EXTERIOR PARTS

摘要

Provided is a polypropylene-based resin composition which exhibits excellent moldability and which is suitable for the molding of parts having high rigidity, excellent surface appearance and excellent surface impact resistace, particularly an automobile bumper. This composition comprises: 30 to 62wt% of a propylene-based copolymer having an MFR of 40 to 70g/10min; 5 to 20wt% of a propylene-based block copolymer which comprises both a high-MFR crystalline polypropylene segment and a specific ethylene-propylene copolymer segment and which has an MFR of 100 to 130g/10min; 10 to 20wt% of a combination of two ethylene-a-olefin copolymer elastomers which each have a specific MFR and a specific density; and 23 to 30wt% of talc having a specific particle diameter.