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    Rubber composition, vulcanized rubber, and tire
    2.
    发明授权
    Rubber composition, vulcanized rubber, and tire 有权

    公开(公告)号：US10227481B2

    公开(公告)日：2019-03-12

    申请号：US14780802

    申请日：2014-03-25

    Applicant: KURARAY CO., LTD.

    Inventor： Daisuke Koda ,  Kei Hirata ,  Hiroshi Kanbara

    IPC: C08L9/06 ,  B60C1/00 ,  C08K3/04 ,  C08K3/36 ,  C08L9/00 ,  C08L7/00

    Abstract: The invention relates to a rubber composition having a good processability, and simultaneously having a rolling resistance performance and hardness after vulcanization at high levels, with which the contamination of the mold for processing due to the bleeding-out of the plasticizer can be suppressed, and in which the migration of the plasticizer and so on is suppressed to a low level; a vulcanized rubber obtained by vulcanizing the rubber composition; and to a tire including the rubber composition as at least a part thereof. The rubber composition contains 100 parts by mass of rubber component (A) composed of at least one of a synthetic rubber and a natural rubber, 0.1 to 50 parts by mass of a diene polymer (B), 20 to 150 parts by mass of a filler (C), 0.1 to 10 parts by mass of a vulcanizing agent (D), 0.1 to 15 parts by mass of a vulcanization accelerator (E) and 0.1 to 15 parts by mass of vulcanization aid (F).

    Heavy-duty tire rubber compositions and tires
    7.
    发明授权
    Heavy-duty tire rubber compositions and tires 有权

    公开(公告)号：US11590799B2

    公开(公告)日：2023-02-28

    申请号：US16643160

    申请日：2018-08-29

    Applicant: KURARAY CO., LTD.

    Inventor： Daisuke Koda ,  Hiroshi Kanbara

    IPC: C08L7/00 ,  C08L9/00 ,  B60C1/00 ,  B60C15/06 ,  C08F230/08 ,  C08F236/06 ,  C08F236/08 ,  C08K3/04 ,  C08K3/36 ,  C08L25/10

    Abstract: The invention provides a heavy-duty tire rubber composition excellent in wet grip performance and steering stability, and a tire tread, a bead filler, a tire belt and a heavy-duty tire which each partially include the composition. The heavy-duty tire rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is not less than 1,000 and not more than 120,000, and (ii) the vinyl content is not less than 30 mol % and less than 70 mol %.

    Rubber composition and tire
    9.
    发明授权
    Rubber composition and tire 有权

    公开(公告)号：US10550248B2

    公开(公告)日：2020-02-04

    申请号：US14913638

    申请日：2014-08-11

    Applicant: KURARAY CO., LTD. ,  AMYRIS, INC.

    Inventor： Daisuke Koda ,  Kei Hirata

    IPC: C08L9/06

    Abstract: The present invention provides a rubber composition capable of producing a rubber molded article that is excellent in rolling resistance performance, steering stability, mechanical strength and abrasion resistance, and a tire obtained by using the rubber composition in at least a part thereof. The present invention relates to a rubber composition including (A) a rubber component including at least one rubber selected from the group consisting of a synthetic rubber and a natural rubber, (B) silica and (C) a modified polymer of farnesene obtained by introducing a functional group into a polymer of farnesene, in which a content of the silica (B) in the rubber composition is from 20 to 150 parts by mass on the basis of 100 parts by mass of the rubber component (A), and a content of the modified farnesene polymer (C) in the rubber composition is from 2 to 10 parts by mass on the basis of 100 parts by mass of the silica (B).

    Rubber compositions
    10.
    发明授权
    Rubber compositions 有权

    公开(公告)号：US10370525B2

    公开(公告)日：2019-08-06

    申请号：US15125420

    申请日：2015-03-10

    Applicant: KURARAY CO., LTD.

    Inventor： Daisuke Koda ,  Kei Hirata

    IPC: C08L9/06 ,  B60C1/00 ,  C08L15/00 ,  C08L7/00 ,  C08C19/28 ,  C08K3/06 ,  C08K3/36 ,  C08K5/09 ,  C08K5/47 ,  C08K5/548 ,  C08L91/00 ,  C08L91/06 ,  C08F136/06 ,  C08F236/06

    Abstract: [Object]The invention provides rubber compositions having excellent filler dispersibility, crosslinked products having excellent properties such as abrasion resistance, and tires that exhibit enhanced rolling resistance performance and attain simultaneous enhancements in steering stability and ice grip performance by virtue of using the compositions or the crosslinked products in portions of the tires.[Solution]The rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 10 parts by mass of a modified liquid diene rubber (B) that is obtained by adding a modifying agent to an unmodified liquid diene rubber (B′) and has functional groups derived from the modifying agent, and 20 to 150 parts by mass of a filler (C). The modified liquid diene rubber (B) satisfies the following (i) to (iv): (i) the content of butadiene units is not less than 50 mass % relative to the total of all monomer units, (ii) the weight average molecular weight (Mw) is 25,000 to 120,000, (iii) the amount of the modifying agent added is 3 to 40 parts by mass per 100 parts by mass of the unmodified liquid diene rubber (B′), and (iv) the average number of functional groups per molecule of the modified liquid diene rubber (B) is 5 to 80.

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