To provide a tire rubber composition that can improve wet grip performance, and a pneumatic tire made using the rubber composition.SOLUTION: A tire rubber composition contains: a rubber component with a styrene-butadiene rubber content of 60 mass% or more and a butadiene rubber content of 10 mass% or more; silica; carbon black; hydrocarbon resin; and liquid rubber, the rubber composition satisfying the following formulas (A) and (B): (A) α1×α2≥2000 and (B) α1×α2/(β1+β2)≤100. α1: Content of silica [pts.mass] relative to rubber component 100 pts.mass. α2: Content of carbon black [pts.mass] relative to rubber component 100 pts.mass. β1: Content of hydrocarbon resin [pts.mass] relative to rubber component 100 pts.mass. β2: Content of liquid rubber [pts.mass] relative to rubber component 100 pts.mass.SELECTED DRAWING: None

    【課題】ウェットグリップ性能を改善できるタイヤ用ゴム組成物、及び該ゴム組成物を用いて作製した空気入りタイヤを提供する。【解決手段】スチレンブタジエンゴムの含有量が60質量%以上、ブタジエンゴムの含有量が10質量%以上であるゴム成分と、シリカと、カーボンブラックと、炭化水素樹脂と、液状ゴムとを含有し、下記式(A)及び(B)を満たすタイヤ用ゴム組成物に関する。(A)α1×α2≧2000(B)α1×α2/(β1+β2)≦100α1:ゴム成分100質量部に対するシリカの含有量[質量部]α2:ゴム成分100質量部に対するカーボンブラックの含有量[質量部]β1:ゴム成分100質量部に対する炭化水素樹脂の含有量[質量部]β2:ゴム成分100質量部に対する液状ゴムの含有量[質量部]【選択図】なし


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    Title :

    TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE


    Additional title:

    タイヤ用ゴム組成物及び空気入りタイヤ


    Contributors:
    TOMITA KOTA (author) / KATO FUMIYA (author) / TOYA SUBARU (author)

    Publication date :

    2020-11-26


    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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