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    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT
    2.
    发明申请
    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT 有权

    公开(公告)号：US20230064604A1

    公开(公告)日：2023-03-02

    申请号：US17894430

    申请日：2022-08-24

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Hiroshi TADAOKA ,  Kazuyoshi SHIGA

    IPC: C08K5/47 ,  C08K5/098

    Abstract: An object of the present disclosure is to provide a rubber composition from which a molded product crosslinked in a short time and having high hardness can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) a benzothiazole compound, wherein (d) the benzothiazole compound is a specific benzothiazole compound, and a relationship of {(T2-T1)/(X-18)} ≥ 0.46 is satisfied, wherein X is an amount (parts by mass) of (b) the co-crosslinking agent with respect to 100 parts by mass of (a) the base rubber, T1 is a torque (N.m) at 35 seconds and T2 is a torque (N.m) at 45 seconds from a start of measuring the torque of the rubber composition when conducting a crosslinking test of the rubber composition at a temperature of 170° C.

    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT
    3.
    发明公开
    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT 审中-公开

    公开(公告)号：US20230312878A1

    公开(公告)日：2023-10-05

    申请号：US18127394

    申请日：2023-03-28

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Takumi KANEKO ,  Hiroshi TADAOKA ,  Ayaka SHINDO ,  Kazuyoshi SHIGA

    IPC: C08K5/378 ,  C08L9/00 ,  A63B37/00

    CPC classification number: C08K5/378 ,  C08L9/00 ,  A63B37/0051 ,  C08L2312/00 ,  A63B2209/00

    Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a compound represented by the formula (1) and/or (d2) a compound represented by the formula (2).




    [In the formulae (1) and (2), R1 and R2 are identical to or different from each other, and represent an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an alkylthio group, a perfluoroalkyl group, an amino group, a carboxy group, a hydrogen atom, or a halogen atom; and R1 and R2 may bond to each other to form a cyclic structure, in this case, the cyclic structure may include at least one member selected from the group consisting of an oxygen atom, a nitrogen atom and a sulfur atom as a ring atom, and the ring atom may have a substituent group.]

    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT
    6.
    发明申请
    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT 有权

    公开(公告)号：US20230135863A1

    公开(公告)日：2023-05-04

    申请号：US17980021

    申请日：2022-11-03

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Hiroshi TADAOKA ,  Kazuyoshi SHIGA

    IPC: C08F136/06 ,  C08K5/098 ,  C08K3/22 ,  C08K5/375 ,  C08K5/47 ,  A63B37/00

    Abstract: An object of the present disclosure is to provide a rubber composition containing an organic sulfur compound from which a molded product having a high hardness can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, (d) a benzothiazole derivative, and (e) an organic sulfur compound, wherein (d) the benzothiazole derivative is a compound represented by the formula (1) and/or a compound represented by the formula (2). [R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aryl group having 4 to 14 carbon atoms, or a metal atom, R2 to R5 are identical to or different from each other, and represent an electron-withdrawing group or a hydrogen atom, and at least one of R3 to R5 is an electron-withdrawing group.]

    GOLF BALL
    7.
    发明申请
    GOLF BALL 有权

    公开(公告)号：US20210086036A1

    公开(公告)日：2021-03-25

    申请号：US16993056

    申请日：2020-08-13

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Ayaka SHINDO ,  Takumi KANEKO ,  Hiroshi TADAOKA ,  Takahiro SHIGEMITSU ,  Kazuyoshi SHIGA

    IPC: A63B37/00 ,  C08K3/22

    Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) a compound represented by the formula (1) as a co-crosslinking agent, and (c) a crosslinking initiator, (R1COO)M(OCOR2)m  (1) in the formula (1), M represents a metal atom, m represents 1 or 2, R1 and R2 are different from each other, represent an alkenyl group having 2 to 30 carbon atoms or an alkynyl group having 2 to 30 carbon atoms and have a carbon-carbon double bond or a carbon-carbon triple bond at an α-position carbon atom bonding to the carbonyl group, and when m is 2, two of R2 may be identical to or different from each other.

    COMPLEX AND PROCESS FOR PREPARING COMPLEX
    8.
    发明申请
    COMPLEX AND PROCESS FOR PREPARING COMPLEX 审中-公开

    公开(公告)号：US20190389884A1

    公开(公告)日：2019-12-26

    申请号：US16450608

    申请日：2019-06-24

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Hiroshi TADAOKA ,  Chiemi MIKURA ,  Kazuyoshi SHIGA

    IPC: C07F3/00

    Abstract: An object of the present invention is to provide a novel complex having at least two carbon-carbon double bonds and/or carbon-carbon triple bonds. The present invention provides a complex represented by a structural formula (2): [In the structural formula (2), M1 to M4 are identical to or different from each other and represent a metal atom, R1 to R6 are identical to or different from each other and represent a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, at least two of R1 to R6 are the alkenyl group having 2 to 18 carbon atoms or the alkynyl group having 2 to 18 carbon atoms, and at least one of R1 to R6 is the alkyl group having 6 to 24 carbon atoms].

    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT
    9.
    发明申请
    RUBBER COMPOSITION AND CROSSLINKED RUBBER MOLDED PRODUCT 有权

    公开(公告)号：US20220411606A1

    公开(公告)日：2022-12-29

    申请号：US17836392

    申请日：2022-06-09

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Hiroshi TADAOKA ,  Kazuyoshi SHIGA ,  Takahiro SHIGEMITSU

    IPC: C08K5/47 ,  C08F136/06 ,  C08K5/098 ,  C08K3/22 ,  C08K5/14 ,  A63B37/00

    Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) a salt of a benzothiazole derivative, wherein (d) the salt of the benzothiazole derivative includes a compound represented by the formula (1) in which a sulfur atom S2 constituting a thiocarbonyl group has a Mulliken charge of −0.190 or more. [In the formula (1), R1 to R4 are identical to or different from each other, and represent an electron-withdrawing group or a hydrogen atom, S1 and S2 represent a sulfur atom, X represents a cation component, n is an integer ranging from 1 to 4, and at least one of R1 to R4 bonding to the identical benzene ring is an electron-withdrawing group when n is 2 or more.]

    GOLF BALL
    10.
    发明申请
    GOLF BALL 有权

    公开(公告)号：US20210086035A1

    公开(公告)日：2021-03-25

    申请号：US16992568

    申请日：2020-08-13

    Applicant: Sumitomo Rubber Industries, Ltd.

    Inventor： Ayaka SHINDO ,  Takumi KANEKO ,  Hiroshi TADAOKA ,  Takahiro SHIGEMITSU ,  Kazuyoshi SHIGA

    IPC: A63B37/00

    Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) two or more α,β-unsaturated carboxylic acids having 3 to 14 carbon atoms and having no substituent group at a carbon atom bonding to the carboxy group, and/or a metal salt thereof, and (c) a crosslinking initiator.

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