Polyolefin grafted polydiene polymers, and methods of making and using same

Patent metadata

Field	Value
Publication number	US-11718698-B2
Application number	US-202017138015-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Dec 29, 2015
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

Embodiments of the present disclosure are directed to polyolefin grafted polydiene polymers, wherein the polyolefin grafted polydiene polymers comprises a polydiene having a polydiene polymer backbone, a polyolefin, and at least one sulfur containing functionalizing agent which grafts the polyolefin onto at least one non-terminal position on the polydiene polymer backbone.

First claim

The invention claimed is:

1. A polyolefin grafted polydiene polymer comprising:
a polydiene having a polydiene polymer backbone;
a polyolefin having an anhydride polymeric modifier; and
at least one sulfur containing functionalizing agent which grafts the polyolefin onto at least one non-terminal position on the polydiene polymer backbone.

2. The polyolefin grafted polydiene polymer of claim 1 , wherein the anhydride polymeric modifier comprises maleic anhydride.

3. The polyolefin grafted polydiene polymer of claim 1 , wherein the sulfur containing functionalizing agent comprises an aminothiol, the aminothiol having an amine moiety which reacts with the anhydride polymeric modifier.

4. The polyolefin grafted polydiene polymer of claim 1 , wherein the polyolefin comprises one or more C 2 -C 12 olefins.

5. The polyolefin grafted polydiene polymer of claim 1 , wherein the polydiene comprises 1,4-polybutadiene having a cis % of at least 85%.

6. A rubber composition comprising:
one or more rubbers selected from natural rubber and polydiene rubber;
reinforcing filler; and
the polyolefin grafted polydiene polymer of claim 1 .

7. The rubber composition of claim 6 , wherein a volume fraction of reinforcing filler plus polyolefin in the rubber composition is about 0.200 to about 0.350.

8. A method of producing a polyolefin grafted polydiene polymer comprising:
reacting a polyolefin having an anhydride polymeric modifier with at least one sulfur containing functionalizing agent to produce a functionalized polyolefin; and
producing the polyolefin grafted polydiene polymer by reacting the functionalized polyolefin with an unsaturated polydiene polymer.

9. The method of claim 8 , wherein the unsaturated polydiene polymer comprises 1,4-polybutadiene having a cis % of at least 85%.

10. The method of claim 8 , wherein the polymeric modifier reacts with the sulfur containing functionalizing agent.

11. The method of claim 8 , wherein the polymeric modifier is maleic anhydride, and the sulfur containing functionalizing agent includes thiols, polysulfides, or combinations thereof.

12. The method of claim 8 , wherein the functionalized polyolefin is grafted onto at least one non-terminal position on the unsaturated polydiene polymer.

13. The method of claim 8 , wherein the polyolefin is a copolymer, wherein the copolymer includes an ethylene monomer and at least one C 3 -C 12 olefin comonomer.

Assignees

• Bridgestone Corp

Inventors

• Hogan Terrence E
• Gozen Arif O
• Ulmer James D

Classifications

• C08F279/02 Primary

  on to polymers of conjugated dienes · CPC title

• B60C1/00

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

• B60C1/0025 Primary

  Compositions of the sidewalls · CPC title

• C08F8/32

  by reaction with amines · CPC title

• C08F8/34

  Introducing sulfur atoms or sulfur-containing groups · CPC title