PROBLEM TO BE SOLVED: To provide a cap tread rubber composition for a winter tire, which improves, in a well balanced manner, fuel economy, wear resistance, performance on ice and snow, and high-speed performance (steering stability and grip performance) on a low-temperature road without ice or snow, and a winter tire using the composition.SOLUTION: The cap tread rubber composition for a winter tire comprises: a rubber component comprising natural rubber and/or isoprene rubber, butadiene rubber and styrene butadiene rubber; and a filler. In 100 mass% of the rubber component, the total content of the natural rubber, the isoprene rubber and the butadiene rubber is 80 mass% or more, the content of the butadiene rubber is 30 mass% or more, and the content of the styrene butadiene rubber is 0.3 to 10 mass%; the content of silica is 60 mass% or more in 100 mass% of the filler; and the content of particulate silica having a nitrogen adsorption specific surface area of 190 m/g or more is 50 parts by mass or more with respect to 100 parts by mass of the rubber component.SELECTED DRAWING: None
【課題】燃費性、耐摩耗性、氷雪上性能、氷雪がない低温路面での高速性能(操縦安定性、グリップ性能)をバランス良く改善するスタッドレスタイヤ用キャップトレッドゴム組成物、及びそれを用いたスタッドレスタイヤを提供する。【解決手段】天然ゴム及び/又はイソプレンゴムと、ブタジエンゴムと、スチレンブタジエンゴムとを含むゴム成分、並びに、充填剤を含有し、前記ゴム成分100質量%中の前記天然ゴム、前記イソプレンゴム及び前記ブタジエンゴムの合計含有量が80質量%以上、前記ブタジエンゴムの含有量が30質量%以上、前記スチレンブタジエンゴムの含有量が0.3〜10質量%、前記充填剤100質量%中のシリカの含有量が60質量%以上、前記ゴム成分100質量部に対する窒素吸着比表面積190m2/g以上の微粒子シリカの含有量が50質量部以上であるスタッドレスタイヤ用キャップトレッドゴム組成物。【選択図】なし
CAP TREAD RUBBER COMPOSITION FOR WINTER TIRE
スタッドレスタイヤ用キャップトレッドゴム組成物
2018-04-05
Patent
Electronic Resource
Japanese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
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