To provide a multicomponent copolymer for use for producing a rubber composition and a rubber product such as tires and the like excellent in crack resistance and further having low heat generation while maintaining high weather resistance, and provide a rubber composition containing the multicomponent copolymer, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a rubber product and a tire using the rubber composition or the crosslinked rubber composition.SOLUTION: The multicomponent copolymer of the present invention contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, wherein the main chain is formed of an acyclic structure alone and the content of the aromatic vinyl unit is 5 mol% or less of the whole multicomponent copolymer. The polystyrene-equivalent weight-average molecular weight (Mw) of the multicomponent copolymer is 10,000 to 9,000,000.SELECTED DRAWING: None

    【課題】高い耐候性を維持しつつ、耐亀裂性に優れ、更に、発熱性が低い架橋ゴム組成物やタイヤ等のゴム製品を製造するために使用される多元共重合体を提供することである。更に、前記多元共重合体を含むゴム組成物、該ゴム組成物を架橋して得られた架橋ゴム組成物、並びに前記ゴム組成物又は前記架橋ゴム組成物を用いたゴム製品及びタイヤを提供することである。【解決手段】共役ジエン単位と、非共役オレフィン単位と、芳香族ビニル単位とを含有する多元共重合体であって、主鎖が非環状構造のみからなり、前記芳香族ビニル単位の含有量が、多元共重合体全体の5mol%以下であり、前記多元共重合体のポリスチレン換算重量平均分子量(Mw)が100,000〜9,000,000であることを特徴とする多元共重合体である。【選択図】なし


    Access

    Download


    Export, share and cite



    Title :

    MULTI-COMPONENT COPOLYMER, RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, RUBBER PRODUCT, AND TIRE


    Additional title:

    多元共重合体、ゴム組成物、架橋ゴム組成物、ゴム製品、及びタイヤ


    Contributors:

    Publication date :

    2021-05-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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 / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



    MULTI-COMPONENT COPOLYMER, RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, RUBBER PRODUCT AND TIRE

    KOTANI KYOHEI / TAKANO SHIGENAGA / OISHI SHIGEKI et al. | European Patent Office | 2023

    Free access

    MULTI-COMPONENT COPOLYMER, RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, RUBBER PRODUCT, AND TIRE

    KIMURA MADOKA / YANAGISAWA AYA / OISHI SHIGEKI et al. | European Patent Office | 2018

    Free access

    Multi-component copolymer, rubber composition, crosslinked rubber composition, rubber product, and tire

    KIMURA MADOKA / YANAGISAWA AYA / OISHI SHIGEKI et al. | European Patent Office | 2020

    Free access


    MULTI-COMPONENT COPOLYMER, RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, RUBBER PRODUCT AND TIRE

    KOTANI KYOHEI / TAKANO SHIGENAGA / OISHI SHIGEKI et al. | European Patent Office | 2017

    Free access