To provide a conjugated diene polymer excellent in balance of abrasion resistance and processability, and also excellent in balance of low hysteresis loss property and wet grip property.SOLUTION: There is provided a conjugated diene polymer having at least 2 peaks derived from the conjugated diene polymer in a molecular weight distribution curve obtained by a gel permeation chromatography (GPC) measurement, in which peak top molecular weight of a peak (B) is 150,000 to 650,000, peak area of the peak (B) is 30% or more and less than 80% when peak area derived from the conjugated diene polymer is 100%, contraction factor at peak top of a peak (A) g'(A) is less than 0.97, contraction factor at peak top of the peak (B) g'(B) is less than 0.86, and g'(A)>g'(B), wherein in 2 peaks of larger order of peak area in the peak of the molecular weight curve, a peak in a high molecular weight side is the peak (A), and a peak in low molecular weight side is the peak (B).SELECTED DRAWING: None

    【課題】耐摩耗性と加工性のバランスに優れ、低ヒステリシスロス性とウェットグリップ性のバランスにも優れている共役ジエン系重合体を得る。【解決手段】ゲルパーミエーションクロマトグラフィー(GPC)測定によって得られる分子量分布曲線において、共役ジエン系重合体由来のピークを少なくとも2つ有し、分子量曲線の前記ピークの中で、ピーク面積の大きい順で2つのピークにおいて、高分子量側のピークをピーク(A)、低分子量側のピークをピーク(B)とした場合に、ピーク(B)のピークトップ分子量が15万〜65万であり、ピーク(B)のピーク面積が、共役ジエン系重合体由来のピーク面積を100%とした場合に30%以上80%未満であり、ピーク(A)のピークトップにおける収縮因子g’(A)が0.97未満であり、ピーク(B)のピークトップにおける収縮因子g’(B)が0.86未満であり、g’(A)>g’(B)である、共役ジエン系重合体。【選択図】なし


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    Title :

    CONJUGATED DIENE POLYMER, CONJUGATED DIENE POLYMER COMPOSITION, AND TIRE


    Additional title:

    共役ジエン系重合体、共役ジエン系重合体組成物、及びタイヤ


    Contributors:

    Publication date :

    2019-10-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / 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



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