PROBLEM TO BE SOLVED: To provide a rubber composition for vibration-proof rubber serving as a raw material for vibration-proof rubber having low dynamic magnification and excellent vibration-proof performance while excellent in creep resistance at high temperature.SOLUTION: A rubber composition for vibration-proof rubber includes ethylene-α-olefin-nonconjugated diene copolymer rubber, a silica, a silane coupling agent, and sulfur. The ethylene-α-olefin-nonconjugated diene copolymer rubber has an ethylene content of 50 wt.% or more, and Mooney viscosity (ML1+4(125°C)) of 65 or more. If a total amount of rubber constituents including the ethylene-α-olefin-nonconjugated diene copolymer rubber is 100 pts.wt., a blend amount of the silica is 12-24 pts.wt., a blend amount of the sulfur is 0.75-2.5 pts.wt.SELECTED DRAWING: None
【課題】低動倍率で防振性能に優れ、かつ高温時の耐クリープ性に優れた防振ゴムの原料となる防振ゴム用ゴム組成物を提供すること。【解決手段】エチレン−α−オレフィン−非共役ジエン共重合体ゴム、シリカ、シランカップリング剤、および硫黄を含有し、エチレン−α−オレフィン−非共役ジエン共重合体ゴムは、エチレン含有量が50重量%以上、かつムーニー粘度(ML1+4(125℃))が65以上であり、エチレン−α−オレフィン−非共役ジエン共重合体ゴムを含むゴム成分の全量を100重量部としたとき、シリカの配合量が12〜24重量部かつ硫黄の配合量が0.75〜2.5重量部である防振ゴム用ゴム組成物。【選択図】 なし
RUBBER COMPOSITION FOR VIBRATION-PROOF RUBBER
防振ゴム用ゴム組成物
2018-06-21
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / F16F SPRINGS , Federn |
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