To provide a rubber composition for tires capable of improving on-snow 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; 100 pts.mass or more of silica based on 100 pts.mass of the rubber component; and a C5 resin. The rubber composition for tires satisfies the following inequalities (A) and (B): (A) α≤20 and (B) β/α≥0.4, where α is the total styrene content [mass%] in the styrene-butadiene rubber and the butadiene rubber, and β is the content [pts.mass] of the C5 resin based on 100 pts.mass of the rubber component.SELECTED DRAWING: None

    【課題】雪上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100質量部以上であるシリカと、C5系樹脂とを含有し、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≦20(B) β/α≧0.4α:スチレンブタジエンゴム及びブタジエンゴム中の総スチレン量[質量%]β:ゴム成分100質量部に対するC5系樹脂の含有量[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:
    WATANABE KENYA (author) / KATO FUMIYA (author) / TOYA SUBARU (author)

    Publication date :

    2020-09-10


    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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