To provide a rubber composition for tire tread capable of providing a tire tread excellent in balance of durability such as abrasion resistance, cutting resistance and tear resistance, and a rolling resistance reduction, the tire tread and a tire, excellent in balance of durability such as abrasion resistance, cutting resistance and tear resistance, and a rolling resistance reduction.SOLUTION: There is provided a rubber composition for tire tread containing a rubber component (A) containing a natural rubber (A1) and a polybutadiene rubber (A2) having cis 1,4-binding amount of 90% or more, carbon black (B) having CTAB specific surface area of 100 to 150 m/g, and silica (C) having CTAB specific surface area of 200 m/g of less than 10 pts.mass based on 100 pts.mass of the rubber component (A), and having a ratio of the silica (C) in total amount of the carbon black (B) and the silica (C) of 0.1 to 10 mass% and the natural rubber (A1):the polybutadiene rubber (A2)=30:70 to 70:30 by mass ratio.SELECTED DRAWING: None

    【課題】耐摩耗性、耐カット性、耐テアー性等の耐久性及び転がり抵抗低減のバランスに優れたタイヤトレッドが得られるタイヤトレッド用ゴム組成物並びに耐摩耗性、耐カット性、耐テアー性等の耐久性及び転がり抵抗低減のバランスに優れるタイヤトレッド及びタイヤを提供する。【解決手段】天然ゴム(A1)及びシス1,4−結合量が90%以上であるポリブタジエンゴム(A2)を含むゴム成分(A)と、CTAB比表面積が100〜150m2/gのカーボンブラック(B)と、ゴム成分(A)100質量部に対して10質量部未満のCTAB比表面積が200m2/g以上のシリカ(C)とを含み、カーボンブラック(B)とシリカ(C)との合計量中のシリカ(C)の比率が0.1〜10質量%であり、質量比で天然ゴム(A1):ポリブタジエンゴム(A2)=30:70〜70:30であるタイヤトレッド用ゴム組成物。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR TIRE TREAD, TIRE TREAD, AND TIRE


    Additional title:

    タイヤトレッド用ゴム組成物、タイヤトレッド、及びタイヤ


    Contributors:

    Publication date :

    2019-06-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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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