Tire provided with an outer sidewall comprising a thermoplastic elastomer comprising at least one saturated elastomer block

Patent metadata

Field	Value
Publication number	US-11352459-B2
Application number	US-201716465692-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Dec 2, 2016
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A tire has an outer sidewall, said outer sidewall comprising at least one composition comprising an elastomeric matrix which predominantly comprises by weight one or more thermoplastic elastomers comprising at least one elastomer block and at least one thermoplastic block, the elastomer block(s) being saturated.

First claim

The invention claimed is:

1. A tire comprising an ozone-resisting outer sidewall,
wherein the outer sidewall comprises at least one composition comprising an elastomeric matrix which predominantly comprises by weight at least one thermoplastic elastomer comprising at least one elastomer block and at least one thermoplastic block, the at least one elastomer block being saturated,
wherein the at least one elastomer block comprises a content of moieties or units derived from conjugated diene monomers which is less than 15 mol %, and
wherein a weight content of styrene in each thermoplastic block is less than or equal to 15%.

2. The tire according to claim 1 , wherein the at least one thermoplastic elastomer has a glass transition temperature of less than or equal to 25° C.

3. The tire according to claim 1 , wherein a number-average molecular weight of the at least one thermoplastic elastomer is between 30,000 and 500,000 g/mol.

4. The tire according to claim 1 , wherein the at least one elastomer block is selected from the group consisting of ethylenic elastomers, polyethers and mixtures thereof.

5. The tire according to claim 4 , wherein the at least one elastomer block is selected from the group consisting of polyethers, ethylene/propylene copolymers, ethylene/butylene copolymers, and mixtures thereof.

6. The tire according to claim 1 , wherein the at least one thermoplastic block is selected from the group consisting of polyolefins, polyurethanes, polyamides, polyesters, polyacetals, polyethers, polyphenylene sulfides, polyfluorinated compounds, polystyrenes, polycarbonates, polysulfones, polymethyl methacrylate, polyetherimide, thermoplastic copolymers, and mixtures thereof.

7. The tire according to claim 6 , wherein the at least one thermoplastic block is selected from the group consisting of polystyrenes, polyesters, polyamides, polyurethanes, and mixtures thereof.

8. The tire according to claim 7 , wherein the at least one thermoplastic block is selected from the group consisting of polystyrenes, polyesters, polyamides, and mixtures thereof.

9. The tire according to claim 1 , wherein the at least one thermoplastic elastomer is selected from the group consisting of the following linear or star-branched diblock or triblock copolymers: styrene/ethylene/butylene (SEB), styrene/ethylene/propylene (SEP), styrene/ethylene/ethylene/propylene (SEEP), styrene/ethyl ene/butylene/styrene (SEBS), styrene/ethylene/propylene/styrene (SEP S), styrene/ethylene/ethylene/propylene/styrene (SEEPS), styrene/isobutylene (SIB), styrene/isobutylene/styrene (SIBS), and mixtures thereof.

10. The tire according to claim 1 , wherein a content of the at least one thermoplastic elastomer ranges from 65 to 100 phr.

11. The tire according to claim 1 , wherein the at least one thermoplastic elastomer is the only elastomer of the elastomeric matrix.

12. The tire according to claim 1 , wherein the at least one composition comprises at least one reinforcing filler.

13. The tire according to claim 12 , wherein the at least one reinforcing filler is carbon black, silica, or a combination of carbon black and silica.

14. The tire according to claim 1 , wherein the at least one composition does not contain a crosslinking system.

Assignees

• Michelin & Cie

Inventors

• Custodero Emmanuel
• FOGLIENI Baptiste
• Chouvel Christophe

Classifications

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• B60C1/00 Primary

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08K3/36

  Silica · CPC title

• C08K3/04

  Carbon · CPC title

• B60C1/0025

  Compositions of the sidewalls · CPC title