To solve the problems in which: a racing tire for circuit traveling is required to have a high dry grip performance; therefore, a tread rubber composition is blended with a large amount of carbon black with a small particle size; however, such a rubber composition has an adverse effect on the dry grip performance when put in a high temperature condition, and also causes a deterioration of the workability.SOLUTION: In a tire rubber composition, a rubber component 100 pts.mass is blended with 90-180 pts.mass of carbon black having a nitrogen adsorption specific surface area of 145-400 m/g; in the rubber component 100 pts.mass, a solution polymerization styrene-butadiene copolymer rubber is 25-100 pts.mass; and the solution polymerization styrene-butadiene copolymer rubber is modified with a modification compound containing at least one alkoxysilyl group and at least two nitrogen atoms in the molecule.SELECTED DRAWING: None

    【課題】サーキット走行向けの競技用タイヤでは、高いドライグリップ性能が要求されている。そのため、トレッド用ゴム組成物に粒子径の小さいカーボンブラックを多量に配合している。しかし、このようなゴム組成物は、高温状態になるとドライグリップ性能に悪影響を及ぼし、また加工性が悪化するという問題点がある。【解決手段】ゴム成分100質量部に対し、窒素吸着比表面積が145〜400m2/gであるカーボンブラックを90〜180質量部配合してなり、前記ゴム成分100質量部中、溶液重合スチレン−ブタジエン共重合体ゴムが25〜100質量部を占め、かつ溶液重合スチレン−ブタジエン共重合体ゴムが、分子中に少なくとも1つのアルコキシシリル基および少なくとも2つの窒素原子を含有する変性化合物により変性されてなるタイヤ用ゴム組成物によって上記課題を解決した。【選択図】なし


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    Title :

    TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE INCLUDING THE SAME


    Additional title:

    タイヤ用ゴム組成物およびそれを用いた空気入りタイヤ


    Contributors:

    Publication date :

    2019-09-05


    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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