| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubber vibration insulator composition having the excellent heat resistance and endurance, capable of achieving a low dynamic-to-static modulus ratio. Ž<P>SOLUTION: The rubber vibration insulator composition includes 100 wt parts of (A) a diene rubber, 10-100 wt parts of (B) a silica having a 10 μm or less average particle size, and (C) a silane coupling agent represented by general formula (1), [wherein R<SP>1</SP>is an alkyl polyether group-O-(R<SP>5</SP>-O)<SB>m</SB>-R<SP>6</SP>, R<SP>5</SP>is a 1-30C hydrocarbon group, m is on average 1-30, R<SP>6</SP>is an alkyl having at least 11 C atoms, and the like, R<SP>2</SP>is R<SP>7</SP>O group, and the like, R<SP>7</SP>is a monovalent alkyl of a 9-30C branched chain, and the like, R<SP>8</SP>is an alkyl of a 1-30C branched chain, and the like, R<SP>3</SP>is a divalent 1-30C hydrocarbon group of a branched chain, and the like, R<SP>4</SP>is H, CN or (C=O)-R<SP>9</SP>, and the like, and R<SP>9</SP>is a monovalent 1-30C hydrocarbon group of a branched chain, and the like]. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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