Abstract: A polypropylene resin composition, particularly, an olefin-based polypropylene resin composition includes: about 50 to 70% by weight of a high crystalline polypropylene; about 10 to 20% by weight of a reactor made thermoplastic polyolefin (RTPO) polypropylene; about 5 to 20% by weight of an inorganic filler; about 10 to 20% by weight of a rubber elastomer; and about 3% by weight or less of a slip agent, based on the total weight of the composition. The composition provides excellent physical properties such as high strength and impact resistance, and thus superior resistance to damage, and shows low gloss characteristics and excellent fluidity. The polypropylene resin composition is used as interior and exterior materials for vehicles.

Abstract: Disclosed is a polypropylene resin composition for automobile interior trim parts with superior paint adhesivity and low specific gravity. More specifically, a polypropylene resin composition for automobile interior trim parts having superior paint adhesivity and low specific gravity is disclosed, wherein a base resin including polypropylene, a propylene-ethylene copolymer or a mixture thereof is mixed with a reinforcer including magnesium hydroxide and an ethylene-butene elastomer. The present polypropylene resin composition allows for direct painting of an automobile interior trim part surface without primer treatment and provides excellent resistance to damage caused by impact.