PROBLEM TO BE SOLVED: To provide a rubber composition for tire excellent in processability when it is vulcanized, excellent in low hysteresis loss property and wet skid resistance and further having excellent abrasion resistance and breaking strength and a manufacturing method therefor.SOLUTION: The invention relates to a rubber composition for tire containing a rubber component containing a modified conjugated diene polymer, first silica and second silica having smaller average primary particle diameter than that of first silica, where the modified conjugated diene polymer has Mooney relaxation rate (MSR) measured at 110°C of 0.45 or less, modification rate of 80 mass% or more and difference between average primary particle diameter of the second silica and average primary particle diameter of the first silica of 2 nm or more.SELECTED DRAWING: None

    【課題】加硫物とする際の加工性に優れ、低ヒステリシスロス性とウェットスキッド抵抗性のバランスに優れ、更に、優れた耐摩耗性及び破壊強度を有する、タイヤ用ゴム組成物及びその製造方法を提供する。【解決手段】本発明は、変性共役ジエン系重合体を含有するゴム成分と、第一シリカと、前記第一シリカよりも平均一次粒子径が小さい第二シリカとを含むタイヤ用ゴム組成物であって、前記変性共役ジエン系重合体は、110℃で測定されるムーニー緩和率(MSR)が0.45以下であり、変性率が80質量%以上であり、前記第二シリカの平均一次粒子径と前記第一シリカの平均一次粒子径との差が2nm以上である、タイヤ用ゴム組成物に関する。【選択図】なし


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    Titel :

    RUBBER COMPOSITION FOR RUBBER AND MANUFACTURING METHOD THEREFOR


    Weitere Titelangaben:

    タイヤ用ゴム組成物及びその製造方法


    Beteiligte:

    Erscheinungsdatum :

    2017-01-19


    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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