| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber vibration insulator composition having the excellent heat resistance, endurance, and rigidity and being capable of achieving a low dynamic-to-static modulus ratio.SOLUTION: The rubber vibration insulator composition contains the following components (C) and (D) together with the following components (A) and (B), in which the component (B) is formulated in an amount ranging from 10 to 100 pts.wt. based on 100 pts.wt. of the component (A). The component (A) is a diene rubber, and the component (B) is a silica having all the following properties (α), (β), and (γ), wherein (α) the silanol group density on the silica surface is 3.0/nmor more as calculated by the Sears titrimetric method, (β) the average particle size is 10 μm or less, and (γ) the BET specific surface area ranges from 15 to 60 m/g, the component (C) is a silane coupling agent having a specific structure, and the component (D) is at least one of zinc monomethacrylate and specific mono(meth)acrylate. |
