To provide a rubber composition for tires which is excellent in mechanical strength before and after thermal deterioration.SOLUTION: The rubber composition for tires contains a rubber component, syndiotactic 1,2-polybutadiene, and an amine-based antioxidant represented by a predetermined general formula (1). The rubber component contains at least one of natural rubber and synthetic isoprene rubber, and the total proportion of the natural rubber and the synthetic isoprene rubber is 50 mass% or more. The syndiotactic 1,2-polybutadiene has a crystal content of 7 J/g or more and 50 J/g or less and a number average molecular weight of 3.0×104 or more. The content of the amine-based antioxidant is 0.1 pt.mass or more and 11 pts.mass or less based on 100 pts.mass of the rubber component.SELECTED DRAWING: None

    【課題】熱劣化の前後において機械強度に優れるタイヤ用ゴム組成物を提供する。【解決手段】ゴム成分と、シンジオタクチック1,2-ポリブタジエンと、所定の一般式(1)で表されるアミン系老化防止剤と、を含有し、前記ゴム成分は、天然ゴム及び合成イソプレンゴムの少なくともいずれかを含み、且つ、前記天然ゴム及び前記合成イソプレンゴムの合計の割合が50質量%以上であり、前記シンジオタクチック1,2-ポリブタジエンは、結晶量が7J/g以上50J/g以下であり、且つ、数平均分子量が3.0×104以上であり、前記アミン系老化防止剤の含有量が、前記ゴム成分100質量部に対して0.1質量部以上11質量部以下である、ことを特徴とする、タイヤ用ゴム組成物である。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR TIRES, VULCANIZED RUBBER COMPOSITION FOR TIRES, AND TIRE


    Additional title:

    タイヤ用ゴム組成物、タイヤ用加硫ゴム組成物、及びタイヤ


    Contributors:

    Publication date :

    2023-05-31


    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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