| abstract |
The invention provides a foamed molded body, a dam rubber, a composite of a rubber barrier and a plate, which can improve the vibration damping property and sound insulation of the plate, and realize the weight reduction of the plate, so that the sound transmission is lost. Ways to increase.n n n The foamed molded article of the resin composition contains a block copolymer (I), which has a polymer block (A) mainly composed of a structural unit derived from an aromatic vinyl compound, and is embedded with other polymers. Segment (B) is measured according to JIS K7244-10 (2005), based on the test piece thickness of 1mm, strain amount of 0.1%, frequency of 1Hz, measurement temperature of -70 ° C to 70 ° C, and heating rate of 3 ° C / min. Block copolymer with a peak top temperature of tan δ of -50 to 50 ° C and a peak top molecular weight of 30,000 to 500,000; olefin-based polymer (II), which is selected from the group consisting of ethylene-propylene-diene copolymer rubber, ethylene -At least one of the group of a vinyl acetate copolymer and a polyethylene resin; a crosslinking agent (III); and a foaming agent (IV). |