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    NBR COMPOSITION AND BUFFER MATERIAL USING SAME
    1.
    发明公开
    NBR COMPOSITION AND BUFFER MATERIAL USING SAME 审中-公开

    公开(公告)号：EP4130130A1

    公开(公告)日：2023-02-08

    申请号：EP21782313.7

    申请日：2021-03-03

    申请人： NOK Corporation

    发明人： MIYOSHI Yuji

    IPC分类号： C08K5/375 ,  C08K5/40 ,  C08L9/02 ,  C08K3/04

    摘要： An NBR composition, that is excellent in rubber material processability and vulcanized rubber hardness, comprising 93 to 105 parts by weight of carbon black with a carbon black grade of N330 or N550, 1.0 to 4.0 parts by weight of a vulcanization retarder, 2.0 to 5.0 parts by weight of thiazole-based and thiuram-based vulcanization accelerators, and 1.0 to 4.0 parts by weight of a sulfur-based vulcanizing agent, based on 100 parts by weight of NBR. The vulcanized molded product obtained from the NBR composition has a rubber hardness (Duro A, instant) of 85 or more according to JIS K6253 corresponding to ISO 18517, and can be effectively used as an automobile buffer material such as a stopper for electric power steering, a buffer material for nailers, a buffer material for devices equipped with hydraulic cylinders, or the like.

    TIRE
    4.
    发明公开
    TIRE 审中-公开

    公开(公告)号：EP3725566A1

    公开(公告)日：2020-10-21

    申请号：EP18889577.5

    申请日：2018-12-06

    申请人： Bridgestone Corporation

    发明人： AMIYA, Motoki ,  MIYAMOTO, Chiyo

    IPC分类号： B60C17/00 ,  B60C1/00 ,  B60C15/06 ,  C08C19/22 ,  C08K3/04 ,  C08K5/40 ,  C08L7/00 ,  C08L15/00

    摘要： The present invention provides a tire which has at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler made of a vulcanized rubber composition comprising a natural rubber as a rubber component and having a difference between a dynamic tensile storage modulus E' at 180°C (A) and a dynamic tensile storage modulus E' at 25°C (B) {E' (A) - E' (B)} of 2.0 MPa or more, the dynamic tensile storage moduli being measured under conditions of an initial tensile strain of 5%, a dynamic tensile strain of 1%, and a frequency of 52 Hz, and provides the tire excellent in achieving both the riding comfort in normal running and the durability in Run-flat running.

    VULCANIZED RUBBER, TIRE, AND RUN-FLAT TIRE
    5.
    发明公开
    VULCANIZED RUBBER, TIRE, AND RUN-FLAT TIRE 审中-公开

    公开(公告)号：EP3640291A1

    公开(公告)日：2020-04-22

    申请号：EP18817836.2

    申请日：2018-06-08

    申请人： Bridgestone Corporation

    发明人： SUZUKI, Eiju

    IPC分类号： C08L9/00 ,  B60C1/00 ,  B60C17/00 ,  C08K3/04 ,  C08K5/40 ,  C08L15/00

    摘要： The vulcanized rubber of the present invention is a vulcanized rubber, which is formed from a rubber composition containing a rubber component containing a dienic rubber, and a vulcanizing agent, and has a tensile modulus of elasticity at 25% elongation at 100°C of 1.2 MPa or more, with a ratio of an Sx bond (where x is 3 or more) to all sulfide bonds being 30% or less. The vulcanized rubber, the tire and the run-flat tire of the invention are excellent in durability life.

    PROCESS FOR PRODUCING RUBBER COMPOSITION
    8.
    发明授权
    PROCESS FOR PRODUCING RUBBER COMPOSITION 有权

    公开(公告)号：EP2695911B1

    公开(公告)日：2018-06-27

    申请号：EP12768449.6

    申请日：2012-04-06

    申请人： Bridgestone Corporation

    发明人： KATOU, Seiichi ,  HORIE, Satoshi

    IPC分类号： C08L7/00 ,  B60C1/00 ,  C08J3/20 ,  C08K3/00 ,  C08K5/09 ,  C08K5/31 ,  C08K5/39 ,  C08K5/40 ,  C08K5/405 ,  C08K5/44 ,  C08K5/47 ,  C08K5/54 ,  C08L9/00 ,  C08K3/04 ,  C08K3/36 ,  C08K5/00 ,  C08K5/548 ,  C08L9/06

    CPC分类号： C08L9/06 ,  B60C1/00 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/0025 ,  C08K5/548 ,  C08L91/00 ,  C08L21/00 ,  C08K3/0033 ,  C08L9/08

    摘要： Provided are processes for producing a rubber composition, which enable a suitably low heat-generating rubber composition to be obtained by further improving coupling function activity of a silane coupling agent. More specifically, provided is a process for producing a rubber composition comprising a rubber component (A) comprising at least one selected from natural rubbers and synthetic diene rubbers, a filler containing an inorganic filler (B), a silane coupling agent (C), and at least two kinds of chemical agents (D) and (E) selected from guanidines, sulfenamides, thiazoles, thiurams, dithiocarbamates, thioureas, and xanthates, wherein the rubber composition is kneaded in a plurality of stages wherein, in the first stage (X) of kneading, the rubber component (A), all or a portion of the inorganic filler (B), all or a portion of the silane coupling agent (C), and at least two kinds of the chemical agents (D) and (E) are added and kneaded. Also provided is a process for producing a rubber composition, wherein the rubber composition is kneaded in a kneading step comprising three or more stages wherein, in the first stage (X) of kneading, the rubber component (A), all or a portion of the inorganic filler (B), all or a portion of the silane coupling agent (C) are kneaded; in a stage (Y) after the first stage but before the last stage of kneading, at least two kinds of the chemical agents (D) and (E) are added and kneaded; and, in the last stage (Z) of kneading, a vulcanizing agent is added and kneaded.

    NON-PNEUMATIC TIRE
    10.
    发明公开
    NON-PNEUMATIC TIRE 审中-公开
    非充气轮胎

    公开(公告)号：EP3275696A1

    公开(公告)日：2018-01-31

    申请号：EP16768790.4

    申请日：2016-03-23

    申请人： Bridgestone Corporation

    发明人： HASEGAWA Keiichi ,  KON Seiji ,  KOUNO Yoshihide ,  NISHIDA Masashi ,  NAKAJIMA Daisuke ,  TOYOSAWA Shinichi

    IPC分类号： B60C7/00 ,  B60B9/04 ,  B60C1/00 ,  C08K3/30 ,  C08K5/40 ,  C08L21/00

    摘要： A non-pneumatic tire (1) of the present invention includes an attachment body (11) attached to an axle, an outer cylindrical body (13) which surrounds the attachment body (11) from the outside in a tire radial direction, a tread portion (16) which surrounds the outer cylindrical body (13) from the outside in the tire radial direction, and a coupling member (15) which displaceably couples the attachment body (11) to the outer cylindrical body (13), wherein, a spiral reinforcing layer (20) formed by spirally winding an element wire body in which one cord (42) or a plurality of cords (42) parallel to each other are embedded in a covering body on an outer circumferential surface of the outer cylindrical body (13) is bonded to the outer circumferential surface of the outer cylindrical body (13).

    摘要翻译： 本发明的非充气轮胎（1）具备：安装于车轴的安装体（11）;从轮胎径向外侧围绕安装体（11）的外筒体（13） 从外部沿轮胎径向包围外筒体的连结部件;以及将连结体可移动地连结在外筒体上的连结部件， 螺旋加强层（20），其通过螺旋状地缠绕单丝线主体而形成，在所述单丝主体中，一根帘线（42）或多根彼此平行的帘线（42）嵌入在所述外筒体的外圆周表面上的覆盖体中 13）结合到外圆柱体（13）的外圆周表面。