PROBLEM TO BE SOLVED: To provide a rubber composition for a studless tire excellent in on-ice grip performance and snow sticking performance, and to provide a studless tire prepared using the same.SOLUTION: There is provided a rubber composition for a studless tire, which contains a rubber component containing an isoprene-based rubber and a resin satisfying a following expression (1): y<-30x+320. In the expression, x is a SP value of resin, and y is a cloud point of resin measured by the following method. In the measurement method of cloud point, the resin is mixed with a liquid isoprene rubber having a weight average molecular weight of 25,000-30,000, and the mixed substance is heated to 150°C and completely dissolved to prepare a transparent solution having resin concentration of 10 mass%. The solution is gradually cooled, and a temperature when a cloud is generated is defined as the cloud point.SELECTED DRAWING: None

    【課題】氷上グリップ性能及び雪付き性能に優れたスタッドレスタイヤ用ゴム組成物、及びそれを用いて作製したスタッドレスタイヤを提供する。【解決手段】イソプレン系ゴムを含むゴム成分と、下記式(1)を満たすレジンとを含有するスタッドレスタイヤ用ゴム組成物に関する。y<−30x+320 式(1)x:レジンのSP値y:下記方法で測定されるレジンの曇点(曇点の測定方法)レジンと、重量平均分子量が25000〜30000の液状イソプレンゴムとを混合し、150℃まで加熱して完全に溶解させ、レジン濃度が10質量%の透明な溶液を調製する。この溶液を冷却していき、濁りが発生したときの温度を曇点とする。【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 :

    2018-06-28


    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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