VIBRATION-PROOF RUBBER COMPOSITION AND VIBRATION-PROOF RUBBER

To provide a vibration-proof rubber composition which is capable of maintaining excellent sliding property even under a use environment of a high heat atmosphere or under a use environment at low temperature, in which a friction reduction effect is prevented from being considerably reduced with the lapse of time even if the heat atmosphere and friction are repeated, and further, which is improved in durability, and to provide a vibration-proof rubber configured using the rubber composition.SOLUTION: A vibration-proof rubber composition consists of a natural rubber (NR) and a butadiene rubber (BR) as main rubber components and contains them in a mass ratio of NR/BR=10/90 to 40/60. Carbon black of which the nitrogen adsorption specific surface area is 46 to 120 m2/g when the rubber component is defined as 100 pts.mass is contained by 40 to 80 pts.mass. Fatty acid amide of which the fusion point is 90 to 160°C is contained by 10 to 20 pts.mass and fatty acid amid of which the fusion point is 65 to 88°C is contained by 10 to 20 pts.mass with respect to the rubber component of 100 pts.mass.SELECTED DRAWING: None 【課題】高い熱雰囲気の使用環境下や低温での使用環境下においても、優れた摺動性を維持でき、熱雰囲気と摩擦を繰り返しても、経時的に摩擦低減化効果が大きく低下することがなく、さらに耐久性に優れた防振ゴム組成物の提供及びそのゴム組成物を用いてなる防振ゴムを提供する。【解決手段】主ゴム成分として天然ゴム（ＮＲ）とブタジエンゴム（ＢＲ）からなり、質量比でＮＲ／ＢＲ＝１０／９０～４０／６０の割合で含むと共に、ゴム成分を１００質量部としたときに窒素吸着比表面積が４６～１２０ｍ2／ｇのカーボンブラックを４０～８０質量部含有し、かつ、該ゴム成分１００質量部に対して融点９０～１６０℃の脂肪酸アミドを１０～２０質量部及び融点６５～８８℃の脂肪酸アミドを１０～２０質量部含有する。【選択図】なし