Non-silane polymeric coupler

Patent metadata

Field	Value
Publication number	US-11274188-B2
Application number	US-201916578864-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	May 29, 2019
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

The present disclosure relates to a non-silane polymeric coupler. The non-silane polymeric coupler may include a dendritic polymer core having at least one reactive end group. The at least one reactive end-group may be selected from the group consisting of thiol, thioester, thioether, sulfanyl, mercapto, sulfide, and disulfide.

First claim

What is claimed is:

1. A non-silane polymeric coupler, comprising a dendritic polymer core having at least one reactive end group, and
at least one compatibilizing end group, and the compatibilizing end group is configured to improve compatibility of silica with a vulcanizable rubber,
wherein the at least one reactive end-group is selected from the group consisting of thiol, thioester, thioether, sulfanyl, mercapto, sulfide, and disulfide,
the at least one reactive end group constitutes about 10% to about 50% of end groups of the non-silane polymeric coupler, and
the at least one compatibilizing end group constitutes about 10% to about 40% of end groups of the non-silane polymeric coupler.

2. The non-silane polymeric coupler according to claim 1 , wherein the dendritic polymer core is a dendrimer core.

3. The non-silane polymeric coupler according to claim 1 , wherein the dendritic polymer core is a hyperbranched polymer core.

4. The non-silane polymeric coupler according to claim 1 , wherein the dendritic polymer core comprises O or N or both heteroatoms.

5. The non-silane polymeric coupler according to claim 1 , wherein the dendritic polymer core comprises at least an ether bond (—O—), an amide bond

a urethane bond (—NICOO—), animine bond (—NH—), a tertiary amine

a primary amine or an ester bond

6. The non-silane polymeric coupler according to claim 1 , wherein the at least one reactive end group constitutes about 10% to about 40% of end groups of the non-silane polymeric coupler.

7. The non-silane polymeric coupler according to claim 1 , wherein the compatibilizing end group is a hydrophobic group selected from the group consisting of alkyl, aryl, alkylaryl, arylalkyl, alkylalkoxy, and arylalkoxy.

8. The non-silane polymeric coupler according to claim 1 , wherein the compatibilizing end group is a linear alkyl group with at least 8 carbon atoms.

9. The non-silane polymeric coupler according to claim 1 , wherein the non-silane polymeric coupler is obtained by attaching; at least one reactive group to a dendritic polymer as the at least one reactive end group.

10. The non-silane polymeric coupler according to claim 9 , wherein the dendritic polymer comprises at least a hyperbranched polymer containing O or N or both heteroatoms.

11. The non-silane polymeric coupler according to claim 9 , wherein the dendritic polymer comprises a polyethylenimine.

12. The non-silane polymeric coupler according to claim 9 , wherein the dendritic polymer comprises a hyperbranched polyglycidol or a hyperbranched copolymer of glycidol and an epoxide.

13. A vulcanizable rubber composition, comprising:
(A) a diene-based rubber,
(B) silica, and
(C) the non-silane polymeric coupler as defined by claim 1 .

14. The vulcanizable rubber composition according to claim 13 , wherein the diene-based rubber contains olefinic unsaturation.

15. The vulcanizable rubber composition according to claim 13 , wherein the vulcanizable rubber composition comprises about 50 to about 150 parts by weight of silica per 100 parts of the diene-based rubber.

16. The vulcanizable rubber composition according to claim 13 , wherein the vulcanizable rubber composition comprises about 0.5 to about 20 parts by weight of the non-silane polymeric coupler per 100 parts of the diene-based rubber.

17. A pneumatic tire made from the vulcanizable rubber composition according to claim 13 .

18. A pneumatic tire tread made from the vulcanizable rubber composition according to claim 13 .

19. A process for manufacturing a non-silane polymeric coupler as defined by claim 1 , comprising the steps of:
a) providing a dendritic polymer capable of interacting with silica, and
b) attaching at least one reactive group toward a diene-based rubber to the dendritic polymer as the at least one reactive end group.

Assignees

• Red Avenue New Mat Group Co Ltd
• Univ Tianjin

Inventors

• Zhen Boming
• Chen Yu
• Dong Dong
• Zhang Ning

Classifications

• C08L9/00

  Compositions of homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• B60C1/00

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

• C08L23/22

  Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins · CPC title

• B60C1/0016 Primary

  Compositions of the tread · CPC title

• C08K5/20

  Carboxylic acid amides · CPC title