# US 2014/0155541 A1 · Coupling agent for rubber/carbon black, and rubber composition containing same for use in tires

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- Number: US 2014/0155541 A1
- Document ID: US20140155541A1
- Status: Published application
- Kind: A1
- Application number: 14/234,218
- Filed: 2012-07-20
- Published: 2014-06-05
- Earliest claimed: 2011-07-22
- Assignees: Shikoku Chemicals Corporation
- Inventors: Yukiharu Shirakawa; Takeshi Masuda
- Web page: https://patentgrep.com/patent/US20140155541A1

## CPC

- C08K 5/378: containing heterocyclic rings
- B60C 1/00: Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- C08K 3/04: Carbon
- C08K 5/47: Thiazoles
- 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

## Abstract

The present invention relates to a coupling agent for rubber/carbon black, containing a sulfide compound represented by the following chemical formula (I): (in the formula, each A represents O, S, NH or NR; each R represents a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, or a cyclic alkyl or alkenyl group having 3 to 6 carbon atoms, and when A is NR, the plurality of R's on a condensed aromatic heterocyclic ring may be the same as or different from each other; n represents an integer from 1 to 6; and x represents an integer from 1 to 4).

## Claims

### Claim 1

A coupling agent for rubber/carbon black, comprising a sulfide compound represented by the following chemical formula (I):
(in the formula, each R1 represents a hydrogen atom, a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, or a cyclic alkyl or alkenyl group having 3 to 6 carbon atoms; each A represents O, S, NH or NR2; each R2 represents a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, or a cyclic alkyl or alkenyl group having 3 to 6 carbon atoms,; n represents an integer from 1 to 6; and x represents an integer from 1 to 4).

### Claim 2 (depends on 1)

A rubber composition comprising a carbon black in a proportion of from 10 to 100 parts by weight to 100 parts by weight of a diene rubber and the coupling agent for rubber/carbon black as described in claim 1 in a proportion of from 1 to 30 parts by weight to 100 parts by weight of the carbon black.