| 摘要 |
PURPOSE:To obtain a polypropylene resin composition, containing a specific thermoplastic elastomer having specified polyisoprene blocks and capable of exhibiting excellent vibration damping performance over a wide temperature range from low to high temperatures. CONSTITUTION:A polypropylene resin composition is composed of (A) 50-95wt.% polypropylene resin, preferably crystalline polypropylene resin, composed of a mixture of the polypropylene resin [propylene-ethylene random and/or block copolymer having <=20wt.% ethylene content] with modified polypropylene resin [modified with an unsaturated carboxylic acid (derivative)] and having 5-50 melt flow index and (B) 5-50wt.% thermoplastic elastomer containing >=60wt.% block polymer of a styrene-isoprene-styrene structure in which the polypropylene blocks expressed by the formula have a vinyl structure. |
