公开(公告)号：US20240209192A1

公开(公告)日：2024-06-27

申请号：US18551866

申请日：2022-03-22

Applicant: BRIDGESTONE CORPORATION

Inventor： Kazunori KANEDA ,  Junichi YAMAGISHI ,  Kosuke SAITO

IPC: C08L21/00 ,  B60C1/00 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/09 ,  C08K5/25 ,  C08K5/3415 ,  C08K5/41 ,  C08K5/55

CPC classification number: C08L21/00 ,  B60C1/00 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/09 ,  C08K5/25 ,  C08K5/3415 ,  C08K5/41 ,  C08K5/55

Abstract: A rubber composition comprises: a rubber component; 0.01 parts by mass or more of a rubber-metal adhesion promoter per 100 parts by mass of the rubber component, the rubber-metal adhesion promoter containing at least one selected from the group consisting of a carboxylic acid metal salt (1) having a carbon number of 2 to 25 and a metal species selected from the group consisting of bismuth, copper, antimony, silver, niobium, and zirconium and a compound (2) represented by formula (A); and 4,4′-diphenylmethanebismaleimide. The use of the rubber composition enables obtainment of vulcanized rubber having 10 good deterioration resistance, excellent durability, and excellent rubber-metal thermal deterioration adhesiveness.

公开(公告)号：US20240287285A1

公开(公告)日：2024-08-29

申请号：US18567405

申请日：2022-03-22

Applicant: BRIDGESTONE CORPORATION

Inventor： Yuki DOHATA ,  Shingo ONOUE ,  Kosuke SAITO

IPC: C08K5/47 ,  C08K3/08 ,  C08L7/00 ,  C08L21/00

CPC classification number: C08K5/47 ,  C08K3/08 ,  C08L7/00 ,  C08L21/00 ,  C08K2003/0843

Abstract: A tire including reinforcement layers 6a and 6b including a reinforcing material and a vulcanized rubber covering the reinforcing material, where the vulcanized rubber is a vulcanized rubber of a rubber composition containing N-cyclohexyl-2-benzothiazolylsulfenamide, the reinforcing material contains a metal where a steel cord surface is covered with a ternary plating of copper, zinc and iron, the reinforcement layers 6a and 6b are arranged on the inside of a tread surface in the tire radial direction, and a ratio (a/b) of a modulus (a) at 50% elongation of the vulcanized rubber covering the reinforcing material in the central portion 6C and a modulus (b) at 50% elongation of the vulcanized rubber covering the reinforcing material in the end portion 6E of the reinforcement layers 6a and 6b in the tire width direction is 0.94 to 1.06. The tire has a high modulus and excellent productivity.

公开(公告)号：US20240327625A1

公开(公告)日：2024-10-03

申请号：US18698463

申请日：2022-10-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Masatoshi HIRATA ,  Kosuke SAITO

IPC: C08L7/00 ,  B60C1/00 ,  C08J9/10 ,  C08K5/18

CPC classification number: C08L7/00 ,  B60C1/0016 ,  C08J9/108 ,  C08K5/18 ,  C08J2307/00 ,  C08J2409/06 ,  C08L2201/08 ,  C08L2203/14

Abstract: The present disclosure is directed to providing a tire rubber composition capable of achieving both on-ice performance and breaking resistance (especially, breaking resistance after exposure to high temperatures) of a tire rubber member having voids, and the solution is to provide a tire rubber composition including a rubber component, a void-introducing agent, and an amine-based antioxidant represented by the following general formula (1):




where R1 and R2 are each independently a monovalent saturated hydrocarbon group, wherein the content of the amine-based antioxidant is 0.1 to 11 parts by mass per 100 parts by mass of the rubber component.

公开(公告)号：US20250026914A1

公开(公告)日：2025-01-23

申请号：US18291316

申请日：2022-08-05

Applicant: BRIDGESTONE CORPORATION

Inventor： Kosuke SAITO

IPC: C08K5/18 ,  B60C1/00 ,  C08L9/06

Abstract: Provided is a rubber composition for a tire having excellent ozone resistance and high retention rates of elongation at break (EB) and tensile strength (TB) after aging. The rubber composition for a tire contains a rubber component, an amine age resistor represented by a specific general formula (1), and a quinoline age resistor. The content of the amine age resistor is 0.1 parts by mass to 11 parts by mass relative to 100 parts by mass of the rubber component, and the content of the quinoline age resistor is 0.1 parts by mass to 0.95 parts by mass relative to 100 parts by mass of the rubber component.

公开(公告)号：US20250026913A1

公开(公告)日：2025-01-23

申请号：US18290886

申请日：2022-08-05

Applicant: BRIDGESTONE CORPORATION

Inventor： Kosuke SAITO

IPC: C08K5/18 ,  B60C1/00 ,  C08L9/06

Abstract: The present disclosure provides a rubber composition for tires with excellent ozone resistance and high retention rates of elongation at break (EB) and tensile strength (TB) after aging. The rubber composition includes a rubber component, an amine-based antioxidant represented by the following general formula (1): where R1 and R2 are each independently a monovalent saturated hydrocarbon group, and a quinoline-based antioxidant. The content of the amine-based antioxidant is 0.1 to 11 parts by mass per 100 parts by mass of the rubber component, and the content of the quinoline-based antioxidant is 1.75 to 2.5 parts by mass per 100 parts by mass of the rubber component.

公开(公告)号：US20240343889A1

公开(公告)日：2024-10-17

申请号：US18294157

申请日：2022-08-05

Applicant: BRIDGESTONE CORPORATION

Inventor： Kosuke SAITO

IPC: C08K5/18 ,  C08L9/06

CPC classification number: C08K5/18 ,  C08L9/06

Abstract: Provided is a rubber composition for tires with excellent ozone resistance and high retention rates of elongation at break (EB) and tensile strength (TB) after aging even without using the age resistor 6PPD. The rubber composition contains an amine-based age resistor represented by the general formula (1):




where R1 and R2 being each independently a monovalent saturated hydrocarbon group; and a quinoline-based age resistor. The mass ratio of the content of the quinoline-based age resistor to the content of the amine-based age resistor (content of the quinoline-based age resistor/content of the amine-based age resistor) is 0.05 to 0.2.