To provide a method for producing a branched conjugated diene polymer that can constitute a rubber composition with excellent performance such as low fuel consumption, wear resistance, wet skid resistance, and fracture strength.SOLUTION: A method for producing a branched conjugated diene polymer comprises a polymerization step of obtaining a conjugated diene polymer having an active end, and a branching step of introducing a branched structure by reacting the active end of the conjugated diene polymer with a nitrogen atom-containing branching agent which is a compound represented by Formula (1), where R1 to R2 represent alkyl groups or the like, X1 is an organic group, and Y1 represents an alkyl group or the like.SELECTED DRAWING: None

    【課題】低燃費性、耐摩耗性、ウェットスキッド抵抗性、破壊強度等の性能に優れたゴム組成物を構成し得る分岐化共役ジエン系重合体の製造方法を得る。【解決手段】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、式(1)で表される化合物である窒素原子含有分岐化剤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。TIFF2023144766000027.tif62170R1~R2はアルキル基等を示し、X1は有機基であり、Y1はアルキル基等を示す。【選択図】なし


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    Titel :

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


    Weitere Titelangaben:

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


    Beteiligte:

    Erscheinungsdatum :

    2023-10-11


    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