To provide a rubber composition for base tread which improves wet property when a base tread of a tire is exposed while highly achieving crack resistance and low rolling resistance.SOLUTION: A rubber composition for base tread contains a rubber component (A) and a reinforcing filler (B), in which the rubber component (A) contains a specific modified conjugated diene-based polymer (A1), an amount of the modified conjugated diene-based polymer (A1) is 7-35 pts.mass with respect to 100 pts.mass of the rubber component (A), and an amount of extension oil added to the modified conjugated diene-based polymer (A1) is 10 pts.mass or less with respect to 100 pts.mass of the modified conjugated diene-based polymer (A1), and the reinforcing filler (B) contains carbon black and silica, and an amount of the carbon black is 1-35 pts.mass with respect to 100 pts.mass of the rubber component (A).SELECTED DRAWING: None

    【課題】耐亀裂性と、低転がり抵抗性とを高度に両立しながら、タイヤのベーストレッド露出時ウェット性を向上させるベーストレッド用ゴム組成物を提供すること。【解決手段】ゴム成分(A)と、補強性充填剤(B)とを含み、ゴム成分(A)は、特定の変性共役ジエン系重合体(A1)を含み、変性共役ジエン系重合体(A1)の量が、ゴム成分(A)100質量部に対して、7〜35質量部であり、変性共役ジエン系重合体(A1)に添加されている伸展油の量が、変性共役ジエン系重合体(A1)100質量部に対して、10質量部以下であり、補強性充填剤(B)は、カーボンブラックおよびシリカを含み、カーボンブラックの量が、ゴム成分(A)100質量部に対して、1〜35質量部である、ベーストレッド用ゴム組成物。【選択図】なし


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    Titel :

    RUBBER COMPOSITION FOR BASE TREAD AND TIRE


    Weitere Titelangaben:

    ベーストレッド用ゴム組成物およびタイヤ


    Beteiligte:
    ISHIKAWA SATOSHI (Autor:in) / KUMAKI KENTARO (Autor:in)

    Erscheinungsdatum :

    2020-04-16


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / 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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