# US 2019/0169400 A1 · Rubber composition and pneumatic tire

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169400 A1
- Document ID: US20190169400A1
- Status: Published application
- Kind: A1
- Application number: 16/182,973
- Filed: 2018-11-07
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Assignees: Sumitomo Rubber Industries, Ltd.
- Applicants: Sumitomo Rubber Industries, Ltd.
- Inventors: Hiroaki YAMADA
- Web page: https://patentgrep.com/patent/US20190169400A1

## CPC

- C08K 5/435: Sulfonamides
- B60C 1/0016: {Compositions of the tread}
- C08J 3/203: {Solid polymers with solid and/or liquid additives}
- C08K 5/378: containing heterocyclic rings
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L 9/06: Copolymers with styrene
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/03: containing three or more polymers in a blend
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention provides a rubber composition having good abrasion resistance and a pneumatic tire formed from the rubber composition. Provided is a rubber composition containing: a compound having a group represented by the following formula (I): wherein R11 and R12 are the same or different and each represent a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group optionally containing a heteroatom; and a sulfur atom-containing vulcanization accelerator.

## Claims

### Claim 1

A rubber composition, comprising:
a compound having a group represented by the following formula (I):
wherein R11 and R12 are the same or different and each represent a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group optionally containing a heteroatom; and
a sulfur atom-containing vulcanization accelerator.

### Claim 2 (depends on 1)

The rubber composition according to claim 1,
wherein the rubber composition is obtained by, before kneading a rubber component with any sulfur, kneading the rubber component and the sulfur atom-containing vulcanization accelerator, and then kneading the kneaded mixture with sulfur.

### Claim 3 (depends on 1)

The rubber composition according to claim 1,
wherein the rubber composition is obtained by, before kneading a rubber component with any sulfur, kneading the rubber component, the sulfur atom-containing vulcanization accelerator, and the compound, and then kneading the kneaded mixture with sulfur.

### Claim 4 (depends on 1)

The rubber composition according to claim 1,
wherein the rubber composition comprises, per 100 parts by mass of a rubber component thereof, 0.1 to 5.0 parts by mass of the compound.

### Claim 5 (depends on 1)

The rubber composition according to claim 1, which is a rubber composition for tires.

### Claim 6 (depends on 1)

A method for preparing the rubber composition according to claim 1, the method comprising:
before kneading a rubber component with any sulfur, kneading the rubber component and the sulfur atom-containing vulcanization accelerator; and
then kneading the kneaded mixture with sulfur.

### Claim 7 (depends on 1)

A method for preparing the rubber composition according to claim 1, the method comprising:
before kneading a rubber component with any sulfur, kneading the rubber component, the sulfur atom-containing vulcanization accelerator, and the compound; and
then kneading the kneaded mixture with sulfur.

### Claim 8 (depends on 1)

A pneumatic tire, comprising a tire component formed from the rubber composition according to claim 1.