To provide a method for producing a branched conjugated diene-based polymer excellent in low fuel consumption, wear resistance, wet skid resistance and breaking strength.SOLUTION: There is provided a method for producing a branched conjugated diene-based polymer which comprises: a polymerization step of polymerizing or copolymerizing a conjugated diene compound or a conjugated diene compound and an aromatic vinyl compound using an alkali metal compound or an alkaline-earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having an active terminal; and a branching step of reacting a styrene derivative as a branching agent to introduce a branched structure into the active terminal of the conjugated diene-based polymer.SELECTED DRAWING: None

    【課題】低燃費性、耐摩耗性、ウェットスキッド抵抗性、及び破壊強度に優れた分岐化共役ジエン系重合体の製造方法を提供できる。【解決手段】アルカリ金属化合物又はアルカリ土類金属化合物を重合開始剤として用い、共役ジエン化合物、又は、共役ジエン化合物と芳香族ビニル化合物を、重合又は共重合することで、活性末端を有する共役ジエン系重合体を得る重合工程と、前記共役ジエン系重合体の活性末端に、分岐化剤としてスチレン誘導体を反応させ分岐構造を導入する分岐化工程と、を有する、分岐化共役ジエン系重合体の製造方法。【選択図】なし


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    Titel :

    METHOD FOR PRODUCING BRANCHED CONJUGATED DIENE-BASED POLYMER, METHOD FOR PRODUCING RUBBER COMPOSITION, METHOD FOR PRODUCING TIRE, BRANCHED CONJUGATED DIENE-BASED POLYMER AND BRANCHED CONJUGATED DIENE-BASED POLYMER COMPOSITION


    Weitere Titelangaben:

    分岐化共役ジエン系重合体の製造方法、ゴム組成物の製造方法、タイヤの製造方法、分岐化共役ジエン系重合体、及び分岐化共役ジエン系重合体組成物


    Beteiligte:
    SEKIKAWA SHINICHI (Autor:in) / HISAMURA KENTA (Autor:in) / KADOYA SHOGO (Autor:in) / ARAKI YOSHIFUMI (Autor:in)

    Erscheinungsdatum :

    2021-09-30


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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