RUBBER COMPOSITION FOR TIRES
    146.
    发明公开

    公开(公告)号:US20240010030A1

    公开(公告)日:2024-01-11

    申请号:US18253545

    申请日:2021-11-09

    Abstract: Provided is a rubber composition fora tire. Thirty parts by mass or more of carbon black having a CTAB adsorption specific surface area of 100 m2/g or less is blended into 100 parts by mass of a conjugated diene-based copolymer that includes from 20 mass % to 60 mass % of a first conjugated diene-based copolymer containing an isoprene component and from 40 mass % to 80 mass % of a second conjugated diene-based copolymer containing syndiotactic-1,2-polybutadiene. The syndiotactic-1,2-polybutadiene has a content of a crystallized component of 90% or more, a melting point of 130° C. or lower, and a glass transition temperature Tg of −20° C. or higher. A content a crystallized component in the second conjugated diene-based copolymer is 30 mass % or less.

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