To provide a production method of a branched conjugated diene polymer capable of composing a rubber composition excellent in such performances as high mileage properties, abrasion resistance, wet skid resistance, rupture strength, etc.SOLUTION: A production method of a branched conjugated diene polymer includes: 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 polymer having an active terminal; and a branching step of reacting a prescribed branching agent containing a nitrogen atom and an alkoxysilyl group with the active terminal of the conjugated diene polymer to introduce a branch structure.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】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、重合又は共重合して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、共役ジエン系重合体の活性末端に、窒素原子およびアルコキシシリル基を含有する特定の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。【選択図】なし
PRODUCTION METHOD OF BRANCHED CONJUGATED DIENE POLYMER, BRANCHED CONJUGATED DIENE POLYMER, RUBBER COMPOSITION, PRODUCTION METHOD OF RUBBER COMPOSITION AND TIRE
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
2023-08-24
Patent
Electronic Resource
Japanese
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 |
European Patent Office | 2023
European Patent Office | 2021
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