To provide a modified diene polymer that suppresses a deterioration of wear resistance of a rubber composition and can improve on-ice performance of the rubber composition, and provide a rubber composition or a tire with suppressed deterioration of wear resistance and improved on-ice performance.SOLUTION: A modified diene polymer has a modified group having a hydrophilic functional group. When the number of the modified groups for each molecule of the modified diene polymer is defined as N, and the proportion of the total mass of the modified groups in each molecule of the modified diene polymer with respect to the mass of each molecule of the modified diene polymer is defined as P, N is 2.0 or more, and P/N is 0.10-2 mass%.SELECTED DRAWING: None

    【課題】ゴム組成物の耐摩耗性の低下を抑制し、ゴム組成物の氷上性能を向上することが可能な変性ジエン系重合体を提供すること。耐摩耗性の低下を抑制し、氷上性能が向上するゴム組成物またはタイヤを提供すること。【解決手段】親水性官能基を有する変性基を有する変性ジエン系重合体であって、変性ジエン系重合体1分子当たりの前記変性基の数をNとし、前記変性ジエン系重合体1分子当たりの質量に対する、当該変性ジエン系重合体1分子中の前記変性基の総質量の割合をPとしたとき、Nが2.0以上であり、かつ、P/Nが、0.10〜2質量%である、変性ジエン系重合体。【選択図】なし


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    Title :

    MODIFIED DIENE POLYMER, RUBBER COMPOSITION AND TIRE


    Additional title:

    変性ジエン系重合体、ゴム組成物およびタイヤ


    Contributors:
    OGIWARA AKIKO (author) / KOSAI TOMOYUKI (author) / ERIN SHEEPWASH (author) / LITA CUC (author)

    Publication date :

    2021-06-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / 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