To provide a tire achieving low elastic modulus at a low temperature and high hysteresis loss at the low temperature, and excellent in brake performance on ice, and a vulcanizate and a rubber composition providing the tire.SOLUTION: There is provided a rubber composition containing a rubber component containing a natural rubber, a polybutadiene rubber, and a styrene-butadiene copolymer rubber, and a filler containing silica of 50 to 90 pts.mass based on 100 pts.mass of the rubber component, mass n of the natural rubber in the rubber component is 40 mass% or more, the mass n, mass b of the polybutadiene rubber and mass s of the styrene-butadiene copolymer rubber has a relationship of s≤b≤n, wherein s
【課題】低温における低弾性率と、低温における高ヒステリシスロスを両立し、氷上でのブレーキ性能に優れるタイヤ、並びに、該タイヤが得られる加硫ゴム及びゴム組成物を提供する。【解決手段】天然ゴムと、ポリブタジエンゴムと、スチレン−ブタジエン共重合体ゴムとを含むゴム成分と、前記ゴム成分100質量部に対し、シリカを含む50〜90質量部の充填剤とを含有し、前記ゴム成分中の前記天然ゴムの質量nが40質量%以上であり、前記質量n、前記ポリブタジエンゴムの質量b、及び前記スチレン−ブタジエン共重合体ゴムの質量sが、s≦b≦n(ただし、n=bのとき、s<b)の関係にあり、前記ポリブタジエンゴム及び前記スチレン−ブタジエン共重合体ゴムを含む相に、前記シリカの50質量%以上が含まれるゴム組成物。【選択図】なし
RUBBER COMPOSITION, VULCANIZATE, AND TIRE
ゴム組成物、加硫ゴム及びタイヤ
2019-07-04
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / 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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