| 摘要 |
PURPOSE:To provide the subject composition exhibiting excellent vibration- damping performance in a wide range from low temperatures to high temperatures by adding a thermoplastic elastomer consisting essentially of a block copolymer having a specific structure and a petroleum resin. CONSTITUTION:A composition comprises (A) 100wt.% of polypropylene resin, (B) 5-45wt.% of a thermoplastic elastomer, and (C) 5-20wt.% of an aromatic or alicyclic petroleum resin, the component B comprising mainly a styrene- isoprene-styrene structure block copolymer having a vinylic-structure polyisoprene block. The component A is especially desirably crystalline polypropylene resin containing 1-20wt.% of modified polypropylene. |
