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    TIRE
    5.
    发明申请
    TIRE 有权

    公开(公告)号：US20220194126A1

    公开(公告)日：2022-06-23

    申请号：US17536611

    申请日：2021-11-29

    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

    Inventor： Masaki OSHIMO

    IPC: B60C1/00 ,  C08F236/06 ,  C08F236/08 ,  C08K3/36 ,  C08K5/103

    Abstract: An object of the present disclosure is to provide a tire having improved overall performance of fuel efficiency, breaking resistance, and abrasion resistance. The tire comprises a tread, wherein a cap rubber layer of an outer surface of the tread is formed of a rubber composition comprising a rubber component having a total content of 90% by mass or more of an isoprene-based rubber and a butadiene rubber and silica having a nitrogen adsorption specific surface area (N2SA) of 180 m2/g or more, wherein a total cis content in the butadiene rubber is less than 90% by mass, wherein a tan δ at 70° C. of the rubber composition of the cap rubber layer is less than 0.15, wherein the tread has circumferential grooves extending continuously in a tire circumferential direction and lateral grooves extending in a tire width direction, and wherein a ratio of a total area S2 of the lateral grooves to a total area S1 of the circumferential grooves (S2/S1) is less than 0.80.

    PNEUMATIC TIRE
    7.
    发明申请
    PNEUMATIC TIRE 有权

    公开(公告)号：US20220371372A1

    公开(公告)日：2022-11-24

    申请号：US17610238

    申请日：2020-05-07

    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

    Inventor： Masaki OSHIMO ,  Ryoji MATSUI ,  Toshiaki HAMADA

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

    Abstract: Provided is a pneumatic tire having excellent abrasion resistance and excellent handling stability on an extremely cold road while having a reduced weight. The present disclosure relates to a pneumatic tire, including a tread having a hardness at −20° C. of 90 or less, a hardness at 30° C. of 60 or more, and a maximum thickness of 8.5 mm or less, and a carcass including one carcass ply.

    RUBBER COMPOSITION FOR TIRES AND PNEUMATIC TIRE
    8.
    发明申请
    RUBBER COMPOSITION FOR TIRES AND PNEUMATIC TIRE 审中-公开

    公开(公告)号：US20190185645A1

    公开(公告)日：2019-06-20

    申请号：US16207492

    申请日：2018-12-03

    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

    Inventor： Masaki OSHIMO ,  Daisuke SATO ,  Takahiro MABUCHI

    IPC: C08L9/06 ,  C08L91/00 ,  B60C1/00

    CPC classification number: C08L9/06 ,  B60C1/0008 ,  B60C1/0016 ,  B60C11/0008 ,  C08L7/00 ,  C08L9/00 ,  C08L21/00 ,  C08L91/00 ,  C08L2205/02 ,  C08L2205/035

    Abstract: Provided is a pneumatic tire that provides a balanced improvement of abrasion resistance, wet grip performance, and fuel economy. A rubber composition for tires containing: a rubber component including an aromatic vinyl-conjugated diene copolymer that contains aromatic vinyl units derived from an aromatic vinyl compound and conjugated diene units derived from a conjugated diene compound; carbon black; and a silica having a N2SA of 40 m2/g or more, the copolymer containing at least 80% of isolated aromatic vinyl units based on the total aromatic vinyl units, the copolymer having a ΔTg of more than 10° C. but less than 20° C. as determined by DSC, the rubber component including, based on 100% by mass thereof, 1-90% by mass of the copolymer and 0-70% by mass of an isoprene-based rubber, the rubber composition containing 10 parts by mass or more of the silica per 100 parts by mass of the rubber component.

    HEAVY DUTY TIRE
    10.
    发明公开
    HEAVY DUTY TIRE 审中-公开

    公开(公告)号：US20230322026A1

    公开(公告)日：2023-10-12

    申请号：US17954392

    申请日：2022-09-28

    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

    Inventor： Masaki OSHIMO ,  Kento HISAJIMA

    IPC: B60C11/00 ,  B60C1/00

    CPC classification number: B60C11/0008 ,  B60C1/0016 ,  B60C11/005 ,  B60C2011/0025 ,  B60C2011/0033 ,  B60C2200/06

    Abstract: Provided is a heavy duty tire having excellent chipping resistance during high-speed running. Included is a heavy duty tire including a tread portion, the tread portion including a shoulder region located axially outward from an axially outermost main longitudinal groove extending in a circumferential direction, the tread portion being provided with a tread rubber consisting of a multilayer structure including a cap rubber layer forming a tread outer surface and a radially innermost base rubber layer, the cap rubber layer in the shoulder region containing at least one rubber component including a polybutadiene rubber and a carbon black, the heavy duty tire satisfying the following relationships (1) to (3): (1) Tb/Tc ≤ 0.50; (2) Eb′/Ec′ ≤ 0.60; and (3) Bca/(Tb/Tc) ≥ 40 wherein Tc, Ec′, Tb, Eb′ and Bca are defined herein.

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