PROBLEM TO BE SOLVED: To overcome a problem that hardness or breaking property is reduced and durability is deteriorated even though low rolling resistance is obtained by a means such as reducing blended amount of a filler in a conventional under tread compound under a condition that a tire having low rolling resistance and excellent in durability is needed along with the increase in recent environmental consciousness.SOLUTION: The above described problem is solved by a rubber composition by blending 100 pts.mass of a diene rubber containing a natural rubber of 30 to 95 pts.mass and syndiotactic-1,2-polybutadiene of 5 pts.mass or more, 30 to 90 pts.mass of carbon black having nitrogen absorption specific surface area of 30 to 180 m/g and a sulfide compound such as 2,2'-bis(benzimidazolyl-2)ethyl disulfide (2EBZ) of 0.1 to 20 mass% based on the carbon black.SELECTED DRAWING: None

    【課題】近年の環境意識の高まりに伴い、低転がり抵抗性であり、耐久性に優れたタイヤが求められている。このため、従来のアンダートレッドコンパウンドにおいてフィラーの配合量を減らす等の手法があるが、低転がり抵抗性は得られるものの、硬度や破断特性が低下し、耐久性が悪化するという問題点がある。【解決手段】天然ゴムを30〜95質量部およびシンジオタクチック−1,2−ポリブタジエンを5質量部以上含むジエン系ゴム100質量部に対し、窒素吸着比表面積が30〜180m2/gのカーボンブラックを30〜90質量部、および2,2’−ビス(ベンズイミダゾリル−2)エチルジスルフィド(2EBZ)のようなスルフィド化合物をカーボンブラックに対して0.1〜20質量%配合してなるゴム組成物により、前記課題を解決した。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR TIRE UNDER TREAD AND PNEUMATIC TIRE USING THE SAME


    Additional title:

    タイヤアンダートレッド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 :

    2017-01-12


    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 / C08J Verarbeitung , WORKING-UP / 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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