PROBLEM TO BE SOLVED: To provide a pneumatic tire having improved rolling resistance and operability.SOLUTION: A tread is formed of first and second tread layers 14 and 16 which contain first and second compounds and are adjacent to each other in a tire radial direction, where the second tread layer 14 includes an extension part which extends to the outside in a radial direction toward a travel surface, includes grooves 22 continuous in a peripheral direction and reinforcement zones 24 and 26 arranged on a side face of the groove, and is integrally molded. The first compound contains a diene-based elastomer and 1-150 phr of silica, and the second compound contains a diene-based elastomer, 50-120 phr of a filler containing 20 phr or more of high surface area carbon black having an iodine absorption coefficient of 100 g/kg or more, 1-45 phr of a methylene acceptor, 1-25 phr of a methylene donor and 1-30 phr of one or more additives selected from a carbamic acid resin, a liquid diene-based polymer having a number average molecular weight of 1,000-25,000, and an aromatic hydrocarbon hydrogen resin.SELECTED DRAWING: Figure 1

    【課題】転がり抵抗と運転性能を改善した空気入りタイヤの提供。【解決手段】トレッドが、第一、第二のコンパウンドを含むタイヤ半径方向に隣接する第一、第二のトレッド層14、16からなり、第二のトレッド層14は、走行面に向かって半径方向外側に伸び、周方向に連続した溝22と溝の側面に配置された補強ゾーン24、26とを含む、一体成形された延長部を含む。第一のコンパウンドは、ジエン系エラストマーと1〜150phrのシリカを含み、第二のコンパウンドは、ジエン系エラストマー、100g/kg以上のヨウ素吸収数を有する高表面積カーボンブラック20phr以上を含む50〜120phrのフィラー、1〜45phrのメチレン受容体、1〜25phrのメチレン供与体、及びカルバミン酸樹脂と数平均分子量1000〜25000の液体ジエン系ポリマーと芳香族炭化水素樹脂とから選ばれる一つ以上の添加剤1〜30phrを含む。【選択図】図1


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    Title :

    PNEUMATIC TIRE HAVING DUAL LAYER TREAD


    Additional title:

    デュアル層トレッドを有する空気入りタイヤ



    Publication date :

    2018-06-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



    Pneumatic tire having a dual layer tread

    SCHWEITZER CLAUDE / THOMAS JEAN-LOUIS MARIE FÉLICIEN / AHRENS BODO et al. | European Patent Office | 2019

    Free access

    PNEUMATIC TIRE HAVING A DUAL LAYER TREAD

    SCHWEIZER CLAUDE / THOMAS JEAN LOUIS MARIE FELICIEN / AHRENS BODO et al. | European Patent Office | 2018

    Free access

    PNEUMATIC TIRE HAVING A DUAL LAYER TREAD

    SCHWEITZER CLAUDE / THOMAS JEAN-LOUIS MARIE FÉLICIEN / AHRENS BODO et al. | European Patent Office | 2019

    Free access

    PNEUMATIC TIRE HAVING A DUAL LAYER TREAD

    European Patent Office | 2019

    Free access

    PNEUMATIC TIRE HAVING A DUAL LAYER TREAD

    SCHWEITZER CLAUDE / THOMAS JEAN-LOUIS MARIE FÉLICIEN / AHRENS BODO et al. | European Patent Office | 2018

    Free access