To provide a rubber composition for a tire outer layer, capable of improving fuel economy and ozone resistance in a well-balanced manner, and to provide a pneumatic tire using the same.SOLUTION: The present invention relates to the rubber composition for a tire outer layer, which contains: a rubber component containing a butadiene rubber; a phenylenediamine-based antioxidant; and a surfactant having an HLB value of 5-12. The butadiene rubber contains a nitrogen atom and/or has a cis content of 60 mass% or less. The content of the butadiene rubber is 3-50 mass% in 100 mass% of the rubber component. The content of the phenylenediamine-based antioxidant is 1-10 pts.mass, the content of the surfactant is 0.1-6 pts.mass, and the content of carbon black is less than 25 pts.mass based on 100 pts.mass of the rubber component.SELECTED DRAWING: None

    【課題】低燃費性及び耐オゾン性をバランス良く改善できるタイヤ外層用ゴム組成物、及びこれを用いた空気入りタイヤを提供する。【解決手段】ブタジエンゴムを含むゴム成分と、フェニレンジアミン系老化防止剤と、HLB値が5〜12の界面活性剤とを含有し、前記ブタジエンゴムが、窒素原子を含有する、及び/又は、シス含量が60質量%以下であり、前記ゴム成分100質量%中、前記ブタジエンゴムの含有量が3〜50質量%であり、前記ゴム成分100質量部に対して、前記フェニレンジアミン系老化防止剤の含有量が1〜10質量部、前記界面活性剤の含有量が0.1〜6質量部であり、カーボンブラックの含有量が25質量部未満であるタイヤ外層用ゴム組成物に関する。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR TIRE OUTER LAYER, AND PNEUMATIC TIRE


    Additional title:

    タイヤ外層用ゴム組成物及び空気入りタイヤ


    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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