To provide a rubber composition for tires capable of improving wet grip performance, and a pneumatic tire produced using the rubber composition.SOLUTION: The present invention relates to the rubber composition for tires which contains: a rubber component in which the total content of a styrene-butadiene rubber and a butadiene rubber is 90 mass% or more; 50 pts.mass or more of silica based on 100 pts.mass of the rubber component; and a liquid isoprene rubber. The rubber composition for tires satisfies the following formulae (A) and (B): (A) α≥30 and (B) α/β≥3, where α is the total vinyl content [mass%] in the styrene-butadiene rubber and the butadiene rubber; and β is the content [pts.mass] of the liquid isoprene rubber based on 100 pts.mass of the rubber component.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及びブタジエンゴムの合計含有量が90質量%以上であるゴム成分と、前記ゴム成分100質量部に対する含有量が50質量部以上であるシリカと、液状イソプレンゴムとを含有し、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) α≧30(B) α/β≧3α:スチレンブタジエンゴム及びブタジエンゴム中の総ビニル量[質量%]β:ゴム成分100質量部に対する液状イソプレンゴムの含有量[質量部]【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR TIRES, AND PNEUMATIC TIRE


    Additional title:

    タイヤ用ゴム組成物及び空気入りタイヤ


    Contributors:

    Publication date :

    2020-11-19


    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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