| abstract |
(57) [Summary] [Structure] A vulcanized rubber obtained by vulcanizing an ethylene- (meth) acrylic acid ester copolymer or an ethylene- (meth) acrylic acid ester-crosslinking site-containing monomer copolymer The sound insulation material used. [Effect] It is possible to provide a sound insulating material that uses a synthetic rubber having excellent oil resistance, heat resistance, and cold resistance, does not cause a resonance phenomenon in a wide frequency range, and thus has excellent sound insulation performance. |