PROBLEM TO BE SOLVED: To provide a rubber composition for a studless tire capable of improving on-ice performance and rolling resistance performance.SOLUTION: The rubber composition for a studless tire contains: a rubber component containing a natural rubber and a polybutadiene rubber; oil-absorbing polymer particles which comprise a polymer having a glass transition temperature of -70 to -20°C and a molecular weight distribution of less than 3.0 and have an oil absorption of 100-1,500 ml/100 g; and an oil. The content of the oil-absorbing polymer particles is 0.5-25 pts.mass based on 100 pts.mass of the rubber component. A studless tire includes a tread rubber comprising the rubber composition.SELECTED DRAWING: None

    【課題】氷上性能と転がり抵抗性能を向上することができるスタッドレスタイヤ用ゴム組成物を提供する。【解決手段】天然ゴム及びポリブタジエンゴムを含むゴム成分と、ガラス転移温度が−70〜−20℃でありかつ分子量分布が3.0未満であるポリマーからなり吸油量が100〜1500ml/100gである吸油性ポリマー粒子と、オイルとを含み、吸油性ポリマー粒子の含有量が前記ゴム成分100質量部に対して0.5〜25質量部であるスタッドレスタイヤ用ゴム組成物である。また、該ゴム組成物からなるトレッドゴムを備えたスタッドレスタイヤである。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR STUDLESS TIRE, AND STUDLESS TIRE


    Additional title:

    スタッドレスタイヤ用ゴム組成物及びスタッドレスタイヤ


    Contributors:

    Publication date :

    2018-06-14


    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



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