公开(公告)号：US11993732B2

公开(公告)日：2024-05-28

申请号：US17280029

申请日：2019-09-27

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Yutaro Yamamoto

IPC: C09J175/12 ,  C08G18/10 ,  C08G18/32 ,  C08G18/40 ,  C08G18/44 ,  C08G18/48 ,  C08G18/65 ,  C08G18/66 ,  C08G18/76 ,  C09J7/30 ,  C09J175/08

CPC classification number: C09J175/12 ,  C08G18/10 ,  C08G18/324 ,  C08G18/4018 ,  C08G18/4063 ,  C08G18/44 ,  C08G18/4808 ,  C08G18/4812 ,  C08G18/4845 ,  C08G18/6529 ,  C08G18/6685 ,  C08G18/7671 ,  C09J7/30 ,  C09J175/08 ,  C09J2475/00 ,  C08G18/10 ,  C08G18/6685

Abstract: A two-part curable adhesive composition includes a main agent (A) containing a urethane prepolymer (a1) and a remaining polyisocyanate (a2), and a curing agent (B) containing a non-crystalline polyol compound (b1) and a polyamine compound (b2). An equivalent ratio of an isocyanate group in a raw polyisocyanate to a hydroxyl group in a crystalline polyol compound constituting the urethane prepolymer (a1) is from 2.05 to 12. An NCO group/total active hydrogen group ratio is from 0.5 to 4. An isocyanate group/hydroxyl group ratio is from 2 to 12.

公开(公告)号：US11180641B2

公开(公告)日：2021-11-23

申请号：US16079987

申请日：2017-02-22

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Satoshi Mihara

IPC: C08L9/06 ,  B60C1/00 ,  C08L81/04 ,  C08L21/00 ,  C08K3/04 ,  C08K3/00

Abstract: Provided is a rubber composition including: (i) a sulfur vulcanizable elastomer, (ii) carbon black and/or a white filler, and (iii) a microparticle having a three-dimensionally crosslinked structure; the microparticle being a microparticle obtained by three-dimensionally crosslinking a polymer formed from an oligomer or prepolymer that has a sulfide bond formed from two or more sulfur atoms in a main chain and/or that has a thiol group.

公开(公告)号：US10710407B2

公开(公告)日：2020-07-14

申请号：US15744940

申请日：2016-07-22

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Satoshi Mihara ,  Kazushi Kimura ,  Hirokazu Kageyama

IPC: B60C1/00 ,  C08L9/00 ,  C08L9/06 ,  C08L101/02 ,  C08F2/22 ,  C08F236/06 ,  C08K5/37

Abstract: The present invention provides: a rubber composition for tires which has excellent processability and has excellent low heat build-up when formed into a tire; and a pneumatic tire using the same. The rubber composition for tires of the present invention is a rubber composition for tires, the rubber composition containing a diene rubber (A) and a microparticle (B), a vinyl group content of the diene rubber (A) being from 5 to 35 mass %, the microparticle (B) being a mercapto group-containing organic microparticle in which a crosslinkable oligomer or polymer (b1) is crosslinked, an average particle size of the microparticle (B) being from 1 to 200 μm, and a content of the microparticle (B) being from 1 to 55 parts by mass per 100 parts by mass of the diene rubber (A).

公开(公告)号：US20190062536A1

公开(公告)日：2019-02-28

申请号：US16079987

申请日：2017-02-22

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Satoshi Mihara

IPC: C08L9/06 ,  B60C1/00

Abstract: Provided is a rubber composition including: (i) a sulfur vulcanizable elastomer, (ii) carbon black and/or a white filler, and (iii) a microparticle having a three-dimensionally crosslinked structure; the microparticle being a microparticle obtained by three-dimensionally crosslinking a polymer formed from an oligomer or prepolymer that has a sulfide bond formed from two or more sulfur atoms in a main chain and/or that has a thiol group.

公开(公告)号：US20190048174A1

公开(公告)日：2019-02-14

申请号：US16077399

申请日：2017-02-09

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kazushi Kimura ,  Satoshi Mihara ,  Hirokazu Kageyama

IPC: C08L9/06 ,  C08L9/02 ,  C08L81/02 ,  C08L81/04 ,  C08K3/04 ,  B60C1/00

Abstract: Provided is a rubber composition containing from 1 to 50 parts by mass of an organic microparticle having an average particle size of 0.001 to 100 μm and having a crosslinked structure per 100 parts by mass of a diene rubber, the organic microparticle being a crosslinked microparticle of a copolymer formed from at least two types of segments having repeating units that are different each other, the at least two types of segments being formed from an oligomer or prepolymer having a functional group and having a molecular weight of 500 to 20000, and the functional group forming a crosslinked structure between the at least two types of segments.

公开(公告)号：US09982116B2

公开(公告)日：2018-05-29

申请号：US15557618

申请日：2016-03-18

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Satoshi Mihara

IPC: C08L9/00 ,  B60C1/00 ,  C08L9/06

CPC classification number: C08L9/06 ,  B60C1/00 ,  B60C1/0016 ,  C08K3/04 ,  C08K3/36 ,  C08L9/00 ,  C08L101/00 ,  C08L2205/14 ,  C08L2205/22 ,  C08L75/04 ,  C08K5/548 ,  C08K3/22 ,  C08K3/06 ,  C08K5/47 ,  C08K5/18

Abstract: Provided are a tire rubber composition capable of producing a pneumatic tire having excellent rigidity and wear resistance and a pneumatic tire using the same. The tire rubber composition includes 100 parts by mass of a diene rubber (A) and from 1 to 50 parts by mass of elastic microparticles (B), wherein the elastic microparticles (B) have a form of microparticles obtained by crosslinking a crosslinkable oligomer or polymer (b1) in water or an organic solvent, or in the diene rubber (A), and have an average particle size of from 0.001 to 100 μm, the JIS A hardness of a cured product obtained by crosslinking the crosslinkable oligomer or polymer (b1) without use of water, the organic solvent or the diene rubber (A) is greater than 45, and the elongation of the cured product is 200% or greater.

公开(公告)号：US11685190B2

公开(公告)日：2023-06-27

申请号：US17040487

申请日：2019-03-19

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Hirokazu Kageyama ,  Kazushi Kimura ,  Satoshi Mihara ,  Yutaro Yamamoto

IPC: B60C1/00 ,  C08F236/06 ,  C08G18/71 ,  C08G18/76 ,  C08K5/20 ,  C08K7/16 ,  C08K7/22 ,  C08L9/02 ,  C08L13/00 ,  C08L57/00

CPC classification number: B60C1/00 ,  C08F236/06 ,  C08G18/718 ,  C08G18/7621 ,  C08K5/20 ,  C08K7/16 ,  C08K7/22 ,  C08L9/02 ,  C08L13/00 ,  C08L57/00 ,  C08F2810/40 ,  C08K2201/005 ,  C08L2205/22

Abstract: A rubber composition for a tire according to an embodiment of the present technology includes: 100 parts by mass of a diene rubber and from 1 to 30 parts by mass of a thermally expandable microcapsule composite body, and the thermally expandable microcapsule composite body contains one or more thermally expandable microcapsules and an acrylonitrile butadiene copolymer and/or a crosslinked body thereof covering the one or more thermally expandable microcapsules.

公开(公告)号：US11180634B2

公开(公告)日：2021-11-23

申请号：US16646340

申请日：2018-09-10

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Ayaki Kazariya ,  Makoto Ashiura ,  Satoshi Mihara ,  Kazushi Kimura ,  Hirokazu Kageyama

IPC: C08K5/3462 ,  B60C1/00 ,  C08K5/3432 ,  C08K5/372

Abstract: The present invention provides a rubber composition for a tire, the rubber composition containing: a diene rubber; silica; and a heterocyclic compound (where, the heterocyclic compound does not have a silicon atom) having a hydrocarbon group having from 3 to 30 carbons and at least one type of heterocycle selected from the group consisting of a piperazine ring, a morpholine ring, and a thiomorpholine ring; an average glass transition temperature of the diene rubber being −50° C. or higher; a content of the silica being from 80 to 200 parts by mass per 100 parts by mass of the diene rubber; and a content of the heterocyclic compound being from 0.5 to 20% by mass with respect to the content of the silica. Such rubber composition has excellent processability, exhibits excellent wet grip performance and has low rolling resistance when the rubber composition is formed into a tire.

公开(公告)号：US11040572B2

公开(公告)日：2021-06-22

申请号：US15754119

申请日：2016-08-26

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Satoshi Mihara

IPC: B60C1/00 ,  C08K9/08 ,  C08K3/04 ,  C08K3/36 ,  C08L101/00 ,  C08L91/00 ,  C08L9/06 ,  C08L7/00 ,  C08L9/08 ,  C08G18/69 ,  C08G18/10 ,  C08L75/14 ,  B60C11/00

Abstract: A rubber composition for a tire contains 100 parts by mass of a diene rubber (A) and from 1 to 60 parts by mass of an organic microparticle (B); an average particle size of the organic microparticle (B) being from 0.001 to 100 μm, the organic microparticle (B) having a complex structure composed of a compatible component that is compatible with the diene rubber (A) and an incompatible component that is not compatible with the diene rubber (A), the complex structure having an inner part in which an amount of the incompatible component is greater than an amount of compatible component, and an outer part which covers at least a part of the inner part and in which the amount of the compatible component is greater than an amount of the incompatible component. A pneumatic tire including such rubber composition has a desirable elongation, rigidity, durability, and wear resistance.

公开(公告)号：US10557009B2

公开(公告)日：2020-02-11

申请号：US15557791

申请日：2016-03-10

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kazushi Kimura ,  Hirokazu Kageyama ,  Masaki Sato

IPC: C08L1/02 ,  C08J9/32 ,  B01J13/20 ,  B60C1/00 ,  C08J9/00 ,  C08J9/36 ,  C08L7/00 ,  C08L9/00

Abstract: In the present technology, a thermally expandable microcapsule complex is blended in a rubber component, the thermally expandable microcapsule complex being obtained by preparing an aqueous solution of a water-soluble polymer having a concentration of 1 to 30 mass %, adding from 5 to 60 parts by mass of cellulose fibers to 100 parts by mass of the aqueous solution to prepare a liquid dispersion (1), adding from 10 to 200 parts by mass of thermally expandable microcapsules to the liquid dispersion (1) to prepare a liquid dispersion 2), and evaporating the moisture content of the liquid dispersion (2).