| abstract |
The present invention provides a foamed molded product, a dam rubber, a composite body of the rubber dam and the plate that can improve the vibration damping and sound insulation properties of the plate, and realize the weight reduction of the plate, and the sound transmission loss Ways to increase.n n n The foamed molded product of the resin composition contains: a block copolymer (I), which has a polymer block (A) composed mainly of structural units derived from an aromatic vinyl compound, and is intercalated with other polymers Section (B), according to JIS K7244-10 (2005), measured under the conditions of test piece thickness 1mm, strain amount 0.1%, frequency 1Hz, measuring temperature -70℃~70℃, heating rate 3℃/min The block copolymer whose peak top temperature of tanδ is -50~50℃, and the peak top molecular weight is 30,000~500,000; olefin-based polymer (II), which is selected from ethylene-propylene-diene copolymer rubber, ethylene -At least one of the group of vinyl acetate copolymer and polyethylene resin; crosslinking agent (III); and foaming agent (IV). |