To provide a polymer composition capable of obtaining a vulcanized rubber which can improve grip performance on ice while maintaining high wear resistance and suppresses increase in hardness with time.SOLUTION: There is provided a polymer composition comprising (A1) a polymer which comprises (A) a conjugated diene polymer and (B) at least one thermally expandable component selected from the group consisting of a foaming agent, a thermally expandable capsule and a thermally expandable graphite, wherein when the composition ratios (molar ratios) of a structural unit represented by the formula (1), a structural unit represented by the formula (2), a structural unit represented by the formula (3) and a structural unit represented by the formula (4) in a polymer are represented by p, q, r, s, respectively, the conjugated diene polymer (A) is a polymer satisfying the following numerical expression (i): 0.75≤(p+(0.5×r))/(p+q+(0.5×r)+s)≤0.97.SELECTED DRAWING: None

    【課題】耐摩耗性を高く維持しながら氷上グリップ性能を改善でき、しかも経時変化による硬度の上昇が抑制された加硫ゴムを得ることができる重合体組成物を提供すること。【解決手段】(A)共役ジエン系重合体、及び(B)発泡剤、熱膨張性カプセル及び熱膨張性黒鉛よりなる群から選択される少なくとも1種である熱膨張性成分、を含有し、(A)共役ジエン系重合体は、式(1)で表される構造単位、式(2)で表される構造単位、式(3)で表される構造単位、及び式(4)で表される構造単位の重合体中の構成比(モル比)をそれぞれp、q、r、sとしたとき、数式(i)の条件を満たす重合体である(A1)重合体を含む重合体組成物とする。数式(i):0.75≦(p+(0.5×r))/(p+q+(0.5×r)+s)≦0.97TIFF2022089381000013.tif3179【選択図】なし


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    Title :

    POLYMER COMPOSITION, CROSSLINKED BODY AND TIRE


    Additional title:

    重合体組成物、架橋体及びタイヤ


    Contributors:

    Publication date :

    2022-06-16


    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 / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / 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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    KIKUCHI TOSHIMITSU / SENGA HIROFUMI / SAKAGAMI YUTO et al. | European Patent Office | 2022

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