PROBLEM TO BE SOLVED: To provide a rubber composition for tire rim cushion good in processability, high in hardness and excellent in thermal aging resistance and a pneumatic tire using the same.SOLUTION: There is provided a rubber composition for tire rim cushion containing a diene rubber containing butadiene rubber of 30 to 90 mass%, carbon black having iodine adsorption amount of 60 to 130 mg/g and isocyanuric acid derivative and/or carboxylic acid derivative having three or more mercapto groups and a specific structure with the content of the carbon black of 60 pts.mass based on 100 pts.mass of the diene rubber and the content of the isocyanuric acid derivative and the carboxylic acid derivative of 0.1 to 3.5 pts.mass based on 100 pts.mass of the diene rubber.

    【課題】加工性が良好であり、また、硬度が高く、耐熱老化性に優れたタイヤリムクッション用ゴム組成物およびそれを用いた空気入りタイヤを提供する。【解決手段】ブタジエンゴムを30〜90質量%含むジエン系ゴムと、ヨウ素吸着量が60〜130mg/gであるカーボンブラックと、メルカプト基を3個以上有する特定構造のイソシアヌル酸誘導体および/またはカルボン酸誘導体と、を含有し、前記カーボンブラックの含有量が、前記ジエン系ゴム100質量部に対して60質量部以上であり、前記イソシアヌル酸誘導体および前記カルボン酸誘導体の含有量が、前記ジエン系ゴム100質量部に対して0.1〜3.5質量部である、タイヤリムクッション用ゴム組成物。【選択図】図1


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    Title :

    RUBBER COMPOSITION FOR TIRE RIM CUSHION AND PNEUMATIC TIRE USING THE SAME


    Additional title:

    タイヤリムクッション用ゴム組成物およびそれを用いた空気入りタイヤ


    Contributors:

    Publication date :

    2015-07-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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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