To provide a rubber composition for studless tires which improves on-ice performance and wear resistance.SOLUTION: The rubber composition for studless tires contains 10-30 pts.mass of thermally expandable microcapsules based on 100 pts.mass of a diene rubber. An outer shell constituting the thermally expandable microcapsules comprises a thermoplastic resin being a polymer of a polymerizable component containing a monofunctional monomer (A) and a polyfunctional monomer (B). The monofunctional monomer (A) contains a nitrile-based monomer and a carboxyl group-containing monomer. The polyfunctional monomer (B) has two or more (meth)acryloyl groups and a reactive carbon-carbon double bond other than the (meth)acryloyl groups, is represented by general formula: R1-O-R2-O-R3 (where R1 and R3 are each a (meth)acryloyl group; and R2 is a structure containing a polymer chain having a reactive carbon-carbon double bond), and has a weight average molecular weight of 500-50,000.SELECTED DRAWING: None

    【課題】 氷上性能および耐摩耗性を改良するスタッドレスタイヤ用ゴム組成物を提供する。【解決手段】 ジエン系ゴム100質量部に、熱膨張性マイクロカプセルを10~30質量部配合し、前記熱膨張性マイクロカプセルを構成する外殻が、単官能モノマー(A)および多官能モノマー(B)を含む重合性成分の重合体である熱可塑性樹脂からなり、前記単官能モノマー(A)がニトリル系モノマーおよびカルボキシル基含有モノマーを含み、多官能モノマー(B)が2以上の(メタ)アクリロイル基および前記(メタ)アクリロイル基以外の反応性炭素-炭素二重結合を有し、一般式:R1-O-R2-O-R3(式中、R1およびR3は(メタ)アクリロイル基、R2は反応性炭素-炭素二重結合を有する重合体鎖を含む構造である。)で表され、重量平均分子量が500~50000である。【選択図】なし


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    Titel :

    RUBBER COMPOSITION FOR STUDLESS TIRES


    Weitere Titelangaben:

    スタッドレスタイヤ用ゴム組成物


    Beteiligte:
    NAKAGAWA RYUTARO (Autor:in) / KITA YU (Autor:in)

    Erscheinungsdatum :

    2023-08-28


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

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



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