Patent ID: 7514486

Claim:
A vibration damping rubber composition comprising: a diene-based rubber; a vulcanizing agent of a bismaleimide compound selected from the group consisting of N,N′(4,4,-diphenyl-methane) bismaleimide represented by the following chemical formula (3), bis (3-ethyl-5-methyl-4-maleimidephenyl)methane represented by the following chemical formula (4), 2,2′-bis [4-(4-maleimide phenoxy) phenyl]propane represented by the following chemical formula (5), m-phenylenebis(methylene) bismaleimide represented by the following chemical formula (6), and m-phenylenebis (methylene) biscitraconimide represented by the following chemical formula (7), wherein the vulcanizing agent is sulfur-free; and a vulcanization accelerator.