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    MASTERBATCH
    1.
    发明公开
    MASTERBATCH 审中-公开

    公开(公告)号：EP4461766A1

    公开(公告)日：2024-11-13

    申请号：EP23770410.1

    申请日：2023-03-01

    申请人： FURUKAWA ELECTRIC CO., LTD.

    发明人： HAMURO Yui ,  IKURA Yukihiro ,  NAKAJIMA Yasuo ,  SUYAMA Kenichi

    IPC分类号： C08J3/22 ,  C08K5/54 ,  C08K5/548 ,  C08L1/02 ,  C08L21/00 ,  C08L23/00

    摘要： The purpose of the present invention is to provide: a masterbatch in which cellulose fibers are well dispersed in a rubber and the adhesion strength at the interface between the fibers and the rubber can be increased; and a simple method for producing the masterbatch.
    The present invention provides a masterbatch containing a polyolefin resin, cellulose fibers, and a silane coupling agent. The mass ratio of the polyolefin resin to the cellulose fibers to the silane coupling agent is preferably in a range of 25-74 : 20-55 : 2-55. The silane coupling agent preferably has a polysulfide structure.

    RUBBER COMPOSITION, METHOD FOR PRODUCING RUBBER COMPOSITION, AND TIRE
    4.
    发明公开
    RUBBER COMPOSITION, METHOD FOR PRODUCING RUBBER COMPOSITION, AND TIRE 审中-公开

    公开(公告)号：EP4261047A1

    公开(公告)日：2023-10-18

    申请号：EP21903251.3

    申请日：2021-11-30

    申请人： BRIDGESTONE CORPORATION

    发明人： AOKI, Misa

    IPC分类号： B60C1/00 ,  C08C19/22 ,  C08C19/25 ,  C08K5/31 ,  C08K5/548 ,  C08L7/00 ,  C08L15/00 ,  C08K3/36

    摘要： A rubber composition, contains a rubber component, a filler, and a resin, wherein: the rubber component contains natural rubber, a high-Tg modified styrene-butadiene rubber, and a low-Tg modified styrene-butadiene rubber having a lower glass transition temperature (Tg) than the high-Tg modified styrene-butadiene rubber; both ends of the high-Tg modified styrene-butadiene rubber have been modified and at least one end thereof has been modified with an alkoxysilane; one end of the low-Tg modified styrene-butadiene rubber has been modified with an alkoxysilane; and a mass ratio of the high-Tg modified styrene-butadiene rubber (high-Tg modified SBR) content with respect to the low-Tg modified styrene-butadiene rubber (low-Tg modified SBR) content, i.e., high-Tg modified SBR content/low-Tg modified SBR content, is larger than 1.

    RUBBER COMPOSITION AND TIRE
    9.
    发明公开
    RUBBER COMPOSITION AND TIRE 审中-公开

    公开(公告)号：EP4067111A1

    公开(公告)日：2022-10-05

    申请号：EP20894218.5

    申请日：2020-09-23

    申请人： BRIDGESTONE CORPORATION

    发明人： SONE, Ryota

    IPC分类号： B60C1/00 ,  C08C19/25 ,  C08K5/548 ,  C08L15/00 ,  C08K3/36

    摘要： Provided is a rubber composition having excellent low heat generating properties. The rubber composition of the present disclosure contains a rubber component, a filler containing silica, and a silane coupling agent, where the rubber component contains a conjugated diene-based polymer modified with a modifier containing a compound represented by the formula (1), and the silane coupling agent is a compound represented by the formula (2).