| 摘要 |
PURPOSE:To provide a polypropylene resin compsn. enhanced in dissipation factor around rood temp. and a further wide temp. range, and a vibrational energy absorber. CONSTITUTION:The compsn. comprises 100 pts.wt. polypropylene resin, 10-50 pts.wt. satd. alicyclic hydrocarbon resin, and 5-40 pts.wt. noncrystalline poly-alpha- olefin, provided that the peak value of the dissipation factor (tan delta) thereof is least 0.1 and the Young's modulus thereof at a peak temp. is at least 5X10<8> Pa. The absorber is made from the above polypropylene resin compsn. |
