# US 10,479,880 B2 · Rubber composition for tires 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 10,479,880 B2
- Document ID: US10479880B2
- Status: Granted
- Kind: B2
- Application number: 15/711,353
- Filed: 2017-09-21
- Published: 2018-04-26
- Granted: 2019-11-19
- Earliest claimed: 2016-10-20
- Assignees: Sumitomo Rubber Industries, Ltd.; Shin-Etsu Chemical Co., Ltd.
- Applicants: Sumitomo Rubber Industries, Ltd.; Shin-Etsu Chemical Co., Ltd.
- Inventors: Ryuichi Tokimune; Tsuyoshi Tsuchida; Ryota Kitago; Soh Ishino; Hiroyuki Kishimoto; Munenao Hirokami; Tetsuro Yamada
- Web page: https://patentgrep.com/patent/US10479880B2

## CPC

- C08K 5/548: containing sulfur {(C08K5/5477 takes precedence)}
- C08K 3/36: Silica
- C08K 5/5419: containing at least one Si—C bond
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L 9/06: Copolymers with styrene
- B60C 1/00: Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES

## Abstract

Provided are a rubber composition for tires which achieves both abrasion resistance and processability while maintaining fuel economy, and a pneumatic tire including the rubber composition. A rubber composition for tires, containing an organosilicon compound represented by the average compositional formula (I) below having a ratio of the number of sulfur atoms to the number of silicon atoms of 1.0 to 1.5, wherein x represents the average number of sulfur atoms; m represents an integer of 6 to 12; and R1 to R6 are the same or different and each represent a C1-C6 alkyl or alkoxy group, at least one of R1 to R3 and at least one of R4 to R6 are the alkoxy groups, and two or more of the alkyl or alkoxy groups for R1 to R6 may be joined to form a ring.

## Claims

### Claim 1

A pneumatic tire, formed from a rubber composition for tires,
the rubber composition comprising an organosilicon compound represented by average compositional formula (I) below having a ratio of the number of sulfur atoms to the number of silicon atoms of 1.1 to 1.2,
wherein x represents the average number of sulfur atoms; m represents an integer of 6 to 12; and R1 to R6 are the same or different and each represent a C1-C6 alkyl or alkoxy group, at least one of R1 to R3 and at least one of R4 to R6 are the alkoxy groups, and two or more of the alkyl or alkoxy groups for R1 to R6 may be joined to form a ring.

### Claim 2 (depends on 1)

The pneumatic tire according to claim 1,
wherein the rubber composition comprises:
a diene rubber;
an inorganic filler in an amount of 5 to 150 parts by mass per 100 parts by mass of the diene rubber; and
the organosilicon compound in an amount of 0.5 to 15 parts by mass per 100 parts by mass of the inorganic filler.

### Claim 3 (depends on 2)

The pneumatic tire according to claim 2,
wherein the inorganic filler has a silica content of 90% by mass or more.