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    Pneumatic tire
    2.
    发明授权
    Pneumatic tire 有权

    公开(公告)号：US11472947B2

    公开(公告)日：2022-10-18

    申请号：US16636006

    申请日：2018-06-26

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Keisuke Murase

    IPC: C08L7/00 ,  B60C1/00 ,  B60C11/00 ,  B60C11/03 ,  C08L9/06 ,  B60C5/00 ,  C08K5/5419 ,  C08K3/36 ,  C08K5/372

    Abstract: In a pneumatic tire, a tread portion comprises longitudinal and/or lateral grooves; a groove area ratio of a vehicle inner side region of the tread portion ranges from 30% to 39%; a difference between the groove area ratio Sin and a groove area ratio Sout ranges from 6-14%; and the rubber composition comprises a diene rubber comprising from 10-30 parts by mass of natural rubber and from 70-90 parts by mass of a solution polymerized styrene-butadiene rubber and/or an emulsion polymerized styrene-butadiene rubber per 100 parts by mass of the diene rubber, from 80-150 parts by mass of silica per 100 parts by mass of the diene rubber, from 0.5-10 parts by mass of a cyclic polysulfide per 100 parts by mass of the diene rubber, and from 3-10 mass % of an alkyltriethoxysilane having an alkyl group having from 3-20 carbons relative to an amount of the silica.

    Pneumatic tire
    3.
    发明授权
    Pneumatic tire 有权

    公开(公告)号：US12017479B2

    公开(公告)日：2024-06-25

    申请号：US17269463

    申请日：2019-08-19

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Keisuke Murase

    IPC: B60C1/00 ,  C08F36/06 ,  C08K3/36 ,  C08K5/548 ,  C08L9/06 ,  C08L91/00

    CPC classification number: B60C1/0016 ,  C08F36/06 ,  C08K3/36 ,  C08K5/548 ,  C08L9/06 ,  C08L91/00 ,  C08K2201/006

    Abstract: A pneumatic tire having dry grip performance, wet grip performance, low rolling resistance, and performance on snow, formed by: molding a rubber composition for a tire, the rubber composition containing: from 70 to 150 parts by mass of silica per 100 parts by mass of a diene rubber formed from two types of modified styrene butadiene rubbers and a butadiene rubber, and oil, and from 5 to 15 mass % of 3-octanoylthio-1-propyltriethoxysilane with respect to a mass of the silica, the diene rubber containing 75 mass % or greater and less than 100 mass % total of the two types of modified styrene butadiene rubbers and greater than 0 mass % and 25 mass % or less of the butadiene rubber, a total amount of oil component containing the oil being from 25 to 45 mass % of a total mass of filler containing the silica, and a glass transition temperature being −50° C. or lower.

    Pneumatic Tire
    4.
    发明申请
    Pneumatic Tire 有权

    公开(公告)号：US20210139675A1

    公开(公告)日：2021-05-13

    申请号：US16636006

    申请日：2018-06-26

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Keisuke Murase

    IPC: C08L7/00 ,  C08L9/06 ,  B60C1/00 ,  B60C11/00 ,  B60C11/03

    Abstract: In a pneumatic tire, a tread portion comprises longitudinal and/or lateral grooves; a groove area ratio of a vehicle inner side region of the tread portion ranges from 30% to 39%; a difference between the groove area ratio Sin and a groove area ratio Sout ranges from 6-14%; and the rubber composition comprises a diene rubber comprising from 10-30 parts by mass of natural rubber and from 70-90 parts by mass of a solution polymerized styrene-butadiene rubber and/or an emulsion polymerized styrene-butadiene rubber per 100 parts by mass of the diene rubber, from 80-150 parts by mass of silica per 100 parts by mass of the diene rubber, from 0.5-10 parts by mass of a cyclic polysulfide per 100 parts by mass of the diene rubber, and from 3-10 mass % of an alkyltriethoxysilane having an alkyl group having from 3-20 carbons relative to an amount of the silica.

    Rubber composition for a tire tread
    5.
    发明授权
    Rubber composition for a tire tread 有权

    公开(公告)号：US11685822B2

    公开(公告)日：2023-06-27

    申请号：US16087066

    申请日：2017-03-23

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Keisuke Murase

    IPC: C08L9/06 ,  B60C1/00 ,  C08L7/00

    CPC classification number: C08L9/06 ,  B60C1/0016 ,  C08L7/00 ,  C08L2205/025 ,  C08L2205/035

    Abstract: Provided is a rubber composition including: per 100 parts by mass of a diene rubber containing a natural rubber and from 10 to 30 mass % of a butadiene rubber, from 50 to 100 parts by mass of a filler containing not less than 20 mass % of carbon black, oil, sulfur (S), and a vulcanization accelerator (A), a mass ratio of the natural rubber to the butadiene rubber (NR/BR) being 0.3 or greater, a compounded ratio of the sulfur to the vulcanization accelerator (S/A) being 0.8 or less, and a total amount of an oil component in the rubber composition containing the oil being from 15 to 25 parts by mass.

    Rubber Composition for a Tire Tread
    6.
    发明申请
    Rubber Composition for a Tire Tread 有权

    公开(公告)号：US20210198458A1

    公开(公告)日：2021-07-01

    申请号：US16087066

    申请日：2017-03-23

    Applicant: The Yokohama Rubber Co., LTD.

    Inventor： Keisuke Murase

    IPC: C08L9/06 ,  B60C1/00

    Abstract: Provided is a rubber composition including: per 100 parts by mass of a diene rubber containing a natural rubber and from 10 to 30 mass % of a butadiene rubber, from 50 to 100 parts by mass of a filler containing not less than 20 mass % of carbon black, oil, sulfur (S), and a vulcanization accelerator (A), a mass ratio of the natural rubber to the butadiene rubber (NR/BR) being 0.3 or greater, a compounded ratio of the sulfur to the vulcanization accelerator (S/A) being 0.8 or less, and a total amount of an oil component in the rubber composition containing the oil being from 15 to 25 parts by mass.

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