Polyprolylene resin compositions and interior automotive trim parts

• Main Authors: OSAMU KOJIMA, HIROAKI HASE, TERUAKI HAYASHIDA, SHINEI GIMA, KOUICHI HATADA, YOSHIHIRO KANOME, TAKAO NOMURA, KEN SHIMIZU
• Format: Patent
• Language: English
• Published: 30.12.1998
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

PCT No. PCT/JP98/02214 Sec. 371 Date May 4, 1999 Sec. 102(e) Date May 4, 1999 PCT Filed May 20, 1998 PCT Pub. No. WO98/54258 PCT Pub. Date Dec. 3, 1998A polypropylene resin composition is diclosed which comprises (a) 50-80% by weight of a specific polypropylene/ethylene-propylene copolymer composition, (b) 5-40% by weight of a specific ethylene/ alpha -olefin copolymer rubber, (c) 1-10% by weight of a specific hydrogenated diene block copolymer, and (d) 10-30% by weight of talc, wherein the polypropylene component of the component (a) has a melt flow rate of 100-1,000 g/10 min and a Cf value (cross fractionation ratio) of not more than 0.5. The resin composition has excellent flowability and can impart excellent rigidity, high-temperature rigidity and impact resistance, and well-balanced combination thereof to the molded articles.