To provide a polybutadiene composition comprising a syndiotactic 1,2-polybutadiene and a cis-1,4-polybutadiene having high linearity, and further, to improve low fuel consumption while maintaining hardness in a rubber composition comprising the polybutadiene composition.SOLUTION: There is provided a polybutadiene composition comprising a cis-1,4-polybutadiene and a syndiotactic 1,2-polybutadiene, wherein the absolute molecular weight and intrinsic viscosity are measured by the GPC-LLS-RI-VIS analysis method (gel permeation chromatography-laser light scattering-differential refractive index-viscosity analysis method) for a cis-1,4-polybutadiene, the average value of the slope in the range of the absolute molecular weight of 100000 to 1000000 of the Mark-Houwink plot obtained by plotting the logarithm of absolute molecular weight on the horizontal axis and the logarithm of the intrinsic viscosity on the vertical axis is 0.68 or more.SELECTED DRAWING: None

    【課題】本発明は、シンジオタクチック1,2-ポリブタジエン及びリニアリティの高いシス-1,4-ポリブタジエンを含むポリブタジエン組成物を提供し、さらに、ポリブタジエン組成物を含むゴム組成物において、硬度を維持しつつ低燃費性を向上させる。【解決手段】本発明のポリブタジエン組成物は、シス-1,4-ポリブタジエン及びシンジオタクチック1,2-ポリブタジエンを含むポリブタジエン組成物であって、シス-1,4-ポリブタジエンについてGPC-LLS-RI-VIS分析法(ゲル浸透クロマトグラフ-レーザー光散乱-示差屈折率-粘度分析法)によって絶対分子量及び固有粘度を測定し、絶対分子量の対数を横軸とし、固有粘度の対数を縦軸としてプロットして得られるMark-Houwink プロットの絶対分子量100,000~1,000,000の範囲における傾きの平均値が、0.68以上である。【選択図】なし


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    Title :

    METHOD FOR PRODUCING POLYBUTADIENE COMPOSITION AND RUBBER COMPOSITION COMPRISING POLYBUTADIENE COMPOSITION


    Additional title:

    ポリブタジエン組成物及びその製造方法、並びにポリブタジエン組成物を含むゴム組成物


    Contributors:

    Publication date :

    2023-10-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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