Copolymers of conjugated triene monomers for improved filler interaction

Patent metadata

Field	Value
Publication number	US-9550839-B2
Application number	US-201514797611-A
Country	US
Kind code	B2
Filing date	Jul 13, 2015
Priority date	Aug 31, 2010
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

The present invention achieves increased filler interaction by incorporating a small amount (a few units per chain of rubbery polymer) of a conjugated triene monomer, such as alloocimene, randomly throughout the polymer chain of a rubbery polymer or at the chain ends of the rubbery polymer. The incorporation of the conjugated triene monomer leads to the formation of a polymer containing highly reactive conjugated diene units. These conjugated diene units can chemically react with carbon black leading to superior reinforcement. Alternatively, these conjugated diene units can be used for functionalization of the polymer with silica interactive/reactive groups using Diels Alder reactions. This functionalization of the rubbery polymer can conveniently be conducted in a mixer, such as a Banbury mixer, a mill mixer, or the like.

First claim

What is claimed is:

1. A rubbery polymer having repeat units which are comprised of (1) at least one conjugated diolefin monomer and (2) reactive repeat units having a structural formula selected from the group consisting of:

wherein n is an integer representing the number of repeat units in the polymer.

2. The rubbery polymer as specified in claim 1 wherein the conjugated diolefin monomer is selected from the group consisting of 1,3-butadiene and isoprene.

3. The rubbery polymer as specified in claim 1 wherein said rubbery polymer has a number average molecular weight of at least 50,000.

4. The rubbery polymer as specified in claim 2 wherein the reactive repeat units me of the structural formula:

wherein n is an integer representing the number of repeat units in the polymer.

5. The rubbery polymer as specified in claim 2 wherein the reactive repeat units are of the structural formula:

wherein n is a integer representing the number of repeat units in the polymer.

6. The rubbery polymer as specified in claim 2 wherein the reactive repeat units are of the structural formula:

wherein n is an integer representing the number of repeat units in the polymer.

7. The rubbery polymer as specified in claim 4 wherein said rubbery polymer has a number avenge molecular weight of at least 50,000.

8. The rubbery polymer as specified in claim 5 wherein said rubbery polymer has a number average molecular weight of at least 50,000.

9. The rubbery polymer as specified in claim 6 wherein said rubbery polymer has a number average molecular weight of at least 50,000.

10. A polymeric composition which is comprised of a rubbery polymer and silica, wherein the silica is bonded to the rubbery polymer through repeat units having a formula selected from the group consisting of

wherein n is an integer representing the number of repeat units in the polymer which are bonded to the silica, and wherein

represents silica particles.

11. The polymeric composition as specified in claim 10 wherein the rubbery polymer is comprised of repeat units which are derived from 1,3-butadiene.

12. The polymeric composition as specified in claim 10 wherein the rubbery polymer is comprised of repeat units which are derived from isoprene.

13. The polymeric composition as specified in claim 11 wherein said rubbery polymer has a number average molecular weight of at least 50,000.

14. The polymeric composition as specified in claim 12 wherein said rubbery polymer has a number average molecular weight of at least 50,000.

15. The polymeric composition as specified in claim 10 wherein the silica is bonded to the rubbery polymer through repeat units of the formula:

wherein n is an integer representing the number of repeat units in the polymer which me bonded to the silica, and wherein

represents silica particles.

16. The polymeric composition as specified in claim 10 wherein the silica is bonded to the rubbery polymer through repeat units of the formula:

wherein n is an integer representing the number of repeat units in the polymer which are bonded to the silica, and wherein

represents silica particles.

17. The polymeric composition as specified in claim 10 wherein the silica is bonded to the rubbery polymer through repeat units of the formula:

wherein n is an integer representing the number of repeat units in the polymer which are bonded to the silica, and wherein

represents silica particles.

18. A radial tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, at least two spaced beads, at least one ply extending from bead to bead and sidewalls extending from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is comprised of the polymeric composition specified in claim 10 .

Assignees

• Kaszas Gabor
• Rodewald Stephan
• Kulig Joseph John
• Goodyear Tire & Rubber

Inventors

• Kaszas Gabor
• Rodewald Stephan
• Kulig Joseph John

Classifications

• C08K5/5419

  containing at least one Si—C bond · CPC title

• C08G77/00

  Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule · CPC title

• C08F236/22

  the radical having three or more carbon-to-carbon double bonds · CPC title

• C08F236/10

  with vinyl-aromatic monomers · CPC title

• C08F236/08

  Isoprene · CPC title