POLYPROPYLENE-BASED RESIN COMPOSITION FOR EXTERIOR MEMBER OF AUTOMOBILE AND EXTERIOR MEMBER OF AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To provide a polypropylene-based resin composition for an exterior member of automobiles excellent in moldability (high flowability), dimensional stability (low thermal expansion coefficient), physical property balance (high rigidity, high impact resistance), and providing molding excellent in quality of appearance, and to provide the exterior member of automobiles.SOLUTION: There are provided a polypropylene-based resin composition for an exterior member of automobiles characterized by comprising following components (1)-(3) in such ratios that component (1) is 35-50 wt.%, component (2) is 15-25 wt.%, component (3) is 35-40 wt.%, based on the total amount of the components (1)-(3), and exterior members of automobiles. Wherein the component (1) is a polypropylene based resin polymerized by using a Ziegler catalyst and having a 100-110 g/10 min of a melt flow rate and 160-165°C of melting peak temperature, the component (2) is an ethylene--olefin copolymer having a 2-30 g/10 min of a melt flow rate, and the component (3) is talc having 15-17 of aspect ratio and 6-8 m of an average particle size.