To provide a diene copolymer (B) capable of improving wear resistance performance and grip performance in a well-balanced manner, a rubber composition using the same, and a pneumatic tire.SOLUTION: The diene copolymer (B) has a linear conjugated diene monomer unit and a branched conjugated diene monomer unit and has a weight average molecular weight of 1,000-3,000,000. The diene copolymer (B) is obtained by adding a polymerization catalyst to a reaction medium and then adding and polymerizing the linear conjugated diene monomer and the branched conjugated diene monomer.SELECTED DRAWING: None

    【課題】耐摩耗性能及びグリップ性能をバランス良く改善できるジエン系共重合体(B)、及びこれを用いたゴム組成物、空気入りタイヤを提供する。【解決手段】直鎖状共役ジエン系モノマー単位及び分枝状共役ジエン系モノマー単位を有する重量平均分子量1000〜3000000のジエン系共重合体(B)であって、反応媒体に重合触媒を添加した後に前記直鎖状共役ジエン系モノマー及び前記分枝状共役ジエン系モノマーを添加し重合して得られるジエン系共重合体(B)。【選択図】なし


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    Title :

    DIENE COPOLYMER AND RUBBER COMPOSITION


    Additional title:

    ジエン系共重合体及びゴム組成物


    Contributors:

    Publication date :

    2019-06-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / 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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