Reinforced product comprising a self-adhesive composite reinforcement containing a block copolymer

Patent metadata

Field	Value
Publication number	US-11318792-B2
Application number	US-201716087300-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Mar 24, 2016
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A reinforced product, which can be used in particular for the reinforcing of a finished rubber article, comprises one or more textile or metallic reinforcing threads, the said thread or threads being covered individually or collectively with a sheath comprising a sheathing composition comprising one or more block copolymers comprising at least one polyamide block and at least one polyolefin block, the sheathed thread or threads being themselves embedded in a rubber composition.

First claim

The invention claimed is:

1. A reinforced product comprising one or more reinforcing threads,
wherein the thread or threads are covered individually or collectively with a sheath comprising a sheathing composition comprising one or more block copolymers comprising at least one polyamide block, at least one polyolefin block, and at least one alkylene block, and
wherein the sheathed thread or threads are embedded in a rubber composition,
wherein the one or more block copolymers have the following formula:
PA-(R-Pol-PA)n-R-Pol-R-PA, and

wherein n is between 0 and 100, PA denotes the polyamide block or blocks, R denotes the alkylene block or blocks, and Pol denotes the polyolefin block or blocks.

2. The reinforced product according to claim 1 , wherein the polyolefin block or blocks each exhibit a viscosity of less than 60,000 cPs, the viscosity being measured at 25° C. with a Brookfield device and according to the Brookfield method.

3. The reinforced product according to claim 2 , wherein the polyolefin block or blocks each exhibit a viscosity of less than 40,000 cPs.

4. The reinforced product according to claim 3 , wherein the polyolefin block or blocks each exhibit a viscosity of less than 20,000 cPs.

5. The reinforced product according to claim 4 , wherein the polyolefin block or blocks each exhibit a viscosity of between 1000 and 20,000 cPs.

6. The reinforced product according to claim 2 , wherein the polyolefin block or blocks are a polybutadiene block or blocks.

7. The reinforced product according to claim 1 , wherein the polyamide block or blocks comprise at least one unit selected from the group consisting of PA 6, PA 11, PA 12, PA 6.10, PA 6.6, PA 6.12, PA 10.10, PA 10.12, PA 11/10.T, PA 11/6.T, 12/10.T, 6.10/10.T, 6.12/10.T, 10.10/10.T, 10.12/10.T, 11/6.T/10.T, 12.12/10.T, 12/6.10/10.T, 12/6.12/10.T, 12/10.10/10.T, 12/10.12/10.T and 12/12.12/10.T.

8. The reinforced product according to claim 1 , wherein the polyamide block or blocks each exhibit a number-average molecular weight, measured by potentiometry, of between 600 and 20,000 g/mol.

9. The reinforced product according to claim 8 , wherein the polyamide block or blocks each exhibit a number-average molecular weight, measured by potentiometry, of between 4,000 and 10,000 g/mol.

10. The reinforced product according to claim 1 , wherein the block copolymer comprises a content of polyolefin block between 2% and 98% by weight with respect to a total weight of the block copolymer.

11. The reinforced product according to claim 10 , wherein the block copolymer comprises a content of polyolefin block between 5% and 70% by weight with respect to a total weight of the block copolymer.

12. The reinforced product according to claim 11 , wherein the block copolymer comprises a content of polyolefin block between 6% and 50% by weight with respect to a total weight of the block copolymer.

13. The reinforced product according to claim 12 , wherein the block copolymer comprises a content of polyolefin block between 8% and 30% by weight with respect to a total weight of the block copolymer.

14. The reinforced product according to claim 13 , wherein the block copolymer comprises a content of polyolefin block between 9% and 25% by weight with respect to a total weight of the block copolymer.

15. The reinforced product according to claim 1 , wherein the block copolymer or block copolymers further comprise at least one chain-extending block.

16. The reinforced product according to claim 1 , wherein the at least one alkylene block is a fatty acid dimer.

17. The reinforced product according to claim 16 , wherein the fatty acid dimer is a C2-C36 fatty acid dimer.

18. The reinforced product according to claim 17 , wherein the fatty acid dimer is a C8-C36 fatty acid dimer.

19. The reinforced product according to claim 1 , wherein the block copolymer or block copolymers comprise:
at least one polybutadiene block as the polyolefin block or blocks, and
at least one C2-C36 diacid alkylene block.

20. The reinforced product according to claim 19 , wherein the block copolymer or block copolymers comprise:
at least one polybutadiene block as the polyolefin block or blocks, and
at least one C8-C36 diacid alkylene block.

21. The reinforced product according to claim 1 , wherein the rubber composition further comprises a reinforcing filler.

22. The reinforced product according to claim 1 , wherein the rubber composition further comprises a crosslinking system.

23. The reinforced product according to claim 22 , wherein the reinforcing thread or threads are metallic.

24. A tire comprising a reinforced product according to claim 1 .

Assignees

• Michelin & Cie
• Cie Generale Des Etablissment Michelin

Inventors

• Rigo Sebastien
• Pineau Quentin

Classifications

• D07B2207/404

  Heat treating devices; Corresponding methods · CPC title

• D07B2201/2012

  comprising polymers · CPC title

• B60C2009/2035

  built-up by narrow strips · CPC title

• B60C2009/0021

  Coating rubbers for steel cords · CPC title

• B60C2009/2096

  Twist structures · CPC title