公开(公告)号：US20240253395A1

公开(公告)日：2024-08-01

申请号：US18564307

申请日：2022-05-31

Applicant: Pirelli Tyre S.p.A.

Inventor： Ivan MANGILI ,  Francesca BAIONE ,  John Nazareno HOUSE ,  Valeria Rosaria CIPOLLETTI

IPC: B60C1/00 ,  B60C11/00 ,  C08K5/00 ,  C08L9/06

CPC classification number: B60C1/0016 ,  B60C11/0008 ,  C08K5/0025 ,  C08L9/06 ,  B60C2011/0025 ,  C08L2205/025

Abstract: The present invention relates to a high-performance tyre for vehicle wheels comprising a tread made with a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound comprising (i) a composition of elastomeric polymers consisting of at least one high Tg styrene-butadiene polymer (SBR) and optionally at least one low Tg isoprene (IR) polymer and (ii) a resin mixture consisting of at least one low Tr resin, at least one high Tr resin, and optionally at least one resin with intermediate Tr.

公开(公告)号：US12018154B2

公开(公告)日：2024-06-25

申请号：US17543922

申请日：2021-12-07

Applicant: THE GOODYEAR TIRE & RUBBER COMPANY

Inventor： George Jim Papakonstantopoulos ,  Michael Joseph Rachita

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

CPC classification number: C08L9/06 ,  B60C1/00 ,  B60C1/0016 ,  B60C11/0008 ,  B60C2001/005 ,  B60C2001/0058 ,  B60C2011/0025 ,  C08L2205/03

Abstract: This invention is based upon the discovery that benzoxazine resins can be incorporated into certain rubber compositions to increase the stiffness thereof without increasing hysteresis or reducing tear strength. Such benzoxazine resin reinforced rubber formulations can accordingly be used beneficially in components of rubber products where high stiffness is desirable. Since these benzoxazine resin reinforced rubbers do not increase levels of hysteresis, they can be used in tires components, such as apexes, chaffers, and high stiffness tread blocks without compromising fuel efficiency. This invention more specifically reveals a radial tire having an apex, a chaffer, or a hard tread block segment which is comprised of a rubbery polymer and a benzoxazine resin.

公开(公告)号：US20240199858A1

公开(公告)日：2024-06-20

申请号：US18387526

申请日：2023-11-07

Applicant: Toyo Tire Corporation

Inventor： Satoshi Fukunishi

IPC: C08L7/00 ,  B60C1/00 ,  B60C11/00

CPC classification number: C08L7/00 ,  B60C1/0016 ,  B60C11/0008 ,  B60C11/005 ,  C08L2205/02 ,  C08L2205/03

Abstract: A rubber composition for base tread containing 100 parts by mass of a rubber component, 5 to 50 parts by mass of silica, and 20 to 65 parts by mass of carbon black, in which the rubber component contains 50 to 85 parts by mass of a natural rubber and 15 to 45 parts by mass of a hydrogenated copolymer obtained by hydrogenating an aromatic vinyl/conjugated diene copolymer, the hydrogenated copolymer having a weight-average molecular weight measured by a gel permeation chromatography of 300,000 or more, and a degree of hydrogenation of conjugated diene units of 80 mol % or more.

公开(公告)号：US12005741B2

公开(公告)日：2024-06-11

申请号：US17782267

申请日：2020-12-03

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： Benoit Durand-Gasselin ,  Fabien Hellot ,  Marie-Laure Francois

IPC: B60C11/00 ,  B60C11/24 ,  B60C19/08

CPC classification number: B60C11/0075 ,  B60C11/0008 ,  B60C11/24 ,  B60C19/082 ,  B60C2011/0016 ,  B60C2200/04

Abstract: A tire for a vehicle comprises a tread (2), of which the central part of the tread (2) comprises at least two rubber compounds (221, 222), making up at least 90% of its volume. The first compound (221) is radially on the outside of the second compound (222) and makes up at least 40% and at most 60% of the volume of the central part. The second rubber compound (222) has a Shore hardness DS2 at least equal to 5 plus the Shore hardness DS1 of the first compound (221) and dynamic losses at a temperature of 0° C. and 23° C. that are at least equal to those of the first rubber compound (221). The axially outer parts of the tread are made up of a third compound (223) capable of touching the ground, having a stiffness and a hysteresis that are lower than those of the first compound.

公开(公告)号：US11999198B2

公开(公告)日：2024-06-04

申请号：US17614748

申请日：2020-05-27

Applicant: BRIDGESTONE CORPORATION

Inventor： Tatsuya Tomida

IPC: B60C11/03 ,  B60C11/00 ,  B60C11/12

CPC classification number: B60C11/1281 ,  B60C11/0008 ,  B60C11/005 ,  B60C11/0323 ,  B60C11/1259 ,  B60C2011/0025 ,  B60C2011/0381

Abstract: A pneumatic tire includes, on a tread surface, a plurality of circumferential main grooves extending in the tread circumferential direction, and a plurality of land portions each defined between circumferential main grooves adjacent in the tread width direction among the plurality of circumferential main grooves, or by a circumferential main groove and a tread edge. A widthwise groove (widthwise sipe) (circumferential sipe) includes a widened portion, on the groove bottom side (sipe bottom side), at which the groove width (sipe width) is larger than on the tread surface side. The storage modulus of tread rubber located in a tire radial direction region including at least a reference depth position is larger than a storage modulus of tread rubber located in regions inward and outward in the tire radial direction from the tire radial direction region.

公开(公告)号：US20240157732A1

公开(公告)日：2024-05-16

申请号：US18379544

申请日：2023-10-12

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Shohei SHIBAMOTO

IPC: B60C11/00

CPC classification number: B60C11/0008 ,  B60C2011/0025 ,  B60C2011/0033 ,  B60C2200/10

Abstract: A motorcycle tire includes a tread portion between a pair of tread edges. The tread portion includes a tread rubber forming a tread surface. The tread rubber includes a first rubber layer comprising a first rubber and forming the tread surface, and a second rubber layer comprising a second rubber and being adjacent inwardly in a tire radial direction of the first rubber layer. A loss tangent tan δa of the first rubber at 100 degrees C. is smaller than a loss tangent tan δb of the second rubber at 100 degrees C. A glass transition temperature of the first rubber is lower than a glass transition temperature of the second rubber.

公开(公告)号：US20240131871A1

公开(公告)日：2024-04-25

申请号：US18475984

申请日：2023-09-26

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Tatsuya SASAKI ,  Tsukasa YANO ,  Rena ONITSUKA ,  Shigeki NISHIJIMA ,  Masaki TERASHIMA ,  Yusuke SUEYOSHI ,  Junya SUENO

IPC: B60C11/03 ,  B60C9/02 ,  B60C11/00

CPC classification number: B60C11/0304 ,  B60C9/02 ,  B60C11/0008 ,  B60C11/033 ,  B60C2009/0092 ,  B60C2009/0284 ,  B60C2011/0025

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the portions, and an inner rubber extending between the portions, on the inner side of the carcass.
The inner rubber comprises a first portion extending through the tread portion with a first thickness and a second portion extending through the sidewall portions with a second thickness smaller than the first thickness. The land ratio of the tread portion 2 is 65% or more.

公开(公告)号：US20240117159A1

公开(公告)日：2024-04-11

申请号：US18259209

申请日：2021-12-30

Applicant: Bridgestone Americas Tire Operations, LLC

Inventor： Dennis C. Boley ,  Jamie L. Whyte

IPC: C08L7/00 ,  B60C1/00 ,  B60C11/00

CPC classification number: C08L7/00 ,  B60C1/0016 ,  B60C11/0008 ,  B60C2011/0025 ,  C08L2205/035

Abstract: Disclosed herein are tires made from a rubber composition of specified ingredients including an elastomer component, a resin component including a DCPD-based resin, a hydrocarbon resin other than a DCPD-based resin, a filler component including reinforcing silica filler and carbon black, optionally a silica coupling agent, optionally a liquid plasticizer, and a cure package.

公开(公告)号：US11952438B2

公开(公告)日：2024-04-09

申请号：US16763456

申请日：2018-11-20

Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

Inventor： Anne-Frédérique Salit ,  Benoît Schnell ,  Sophie Gander ,  Sergey Ivanov ,  Etienne Fleury

IPC: C08C19/06 ,  B60C1/00 ,  B60C11/00 ,  C07D303/46 ,  C08F279/02 ,  C08K3/36

CPC classification number: C08C19/06 ,  B60C1/0016 ,  B60C11/0008 ,  C07D303/46 ,  C08F279/02 ,  C08K3/36 ,  B60C2011/0025

Abstract: A 1,3-dipolar compound including an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom having an attachment to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. The use of the 1,3-dipolar compound in the modification of a diene polymer makes it possible to improve the rupture properties of a rubber composition comprising the modified polymer, without the expense of its hysteresis properties, while at the same time improving its implementation.

公开(公告)号：US20230331047A1

公开(公告)日：2023-10-19

申请号：US18043860

申请日：2021-06-17

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Keisuke KAGAYA

IPC: B60C11/00 ,  B60C13/00

CPC classification number: B60C11/0008 ,  B60C13/00 ,  B60C2011/0033 ,  B60C2013/007

Abstract: In this tire, a distance GT from a tread profile at a tire ground contact edge to a tire inner surface, a distance GC from the tread profile at a position of 70% of a tire cross-sectional height to the tire inner surface, and a distance GD from the tread profile at a tire maximum width position to the tire inner surface satisfy conditions 1.00≤GC/GD≤1.10 and 3.00≤GT/GC≤4.00.