# US 10,308,788 B2 · Rubber compound to produce tyres

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- Number: US 10,308,788 B2
- Document ID: US10308788B2
- Status: Granted
- Kind: B2
- Application number: 15/312,382
- Filed: 2015-05-21
- Published: 2017-03-23
- Granted: 2019-06-04
- Earliest claimed: 2014-05-21
- Assignees: Bridgestone Corporation
- Applicants: Bridgestone Corporation
- Inventors: Alessandra Bartoloni; Raffaele Di Ronza
- Web page: https://patentgrep.com/patent/US10308788B2

## CPC

- C08K 5/378: containing heterocyclic rings
- B60C 1/0016: {Compositions of the tread}
- C08K 3/04: Carbon
- C08K 3/36: Silica
- C08K 5/3725: {containing nitrogen}
- 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

A rubber compound comprising at least one polymer base with cross-linkable unsaturated chain, a reinforcing filler, a vulcanization system and an interaction agent between the polymer base and the reinforcing filler consisting of a compound having an amine group and a sulphur atom adapted to react with the polymer base in the vulcanization step. The interaction agent has formula (II) or (III); wherein: y ranges from 0 to 6 R3 is an aliphatic chain containing sulphur and composed of a number of carbon atoms ranging from 1 to 10; wherein: p ranges from 1 to 6.

## Claims

### Claim 1

A rubber compound comprising at least one polymer base with cross-linkable unsaturated chain, a reinforcing filler and a vulcanization system; said rubber compound comprising an interaction agent between the polymer base and the reinforcing filler consisting of a compound having an amine group and a sulphur atom adapted to react with the polymer base in the vulcanization step; said rubber compound being characterised in that said interaction agent has formula (II);
wherein:
y ranges from 0 to 6
R3 is an aliphatic chain containing sulphur and composed of a number of carbon atoms ranging from 1 to 10.

### Claim 2 (depends on 1)

Rubber compound according to claim 1, characterised in that said interaction agent is present in the compound in a quantity ranging from 1 to 10 phr.

### Claim 3 (depends on 1)

Rubber compound according to claim 1, characterised in that said reinforcing filler is silicon dioxide or carbon black or a mixture thereof.

### Claim 4 (depends on 1)

Rubber compound according to claim 1, characterised in that said interaction agent of formula (II) is 4-(methylthio)-benzylamine.

### Claim 5 (depends on 1)

Portion of tyre produced with a compound according to claim 1.

### Claim 6 (depends on 5)

Tyre comprising at least one portion according to claim 5.