Rubber vibration damping material

Patent metadata

Field	Value
Publication number	US-10189960-B2
Application number	US-201515509016-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 16, 2014
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A vulcanized rubber is formed by a method comprising blending a halogenated unsaturated polymer into a rubber comprised of cis 1-4 polyisoprene to form a vulcanizable polymer blend, adding a vulcanization material to the vulcanizable polymer blend, and vulcanizing the vulcanizable polymer blend to form a homogeneous vulcanized rubber. The method may be used to form a vulcanized rubber comprised of polyisoprene uniformly crosslinked with a halogenated unsaturated polymer that is a reaction product of (i) an unsaturated polymer miscible with polyisoprene and having conjugated dienes that undergo a Diels Alder reaction and (ii) a polyhalogenated cyclopentadiene.

First claim

The invention claimed is:

1. A vulcanized rubber comprised of polyisoprene uniformly crosslinked with a halogenated unsaturated polymer that is a reaction product of (i) an unsaturated polymer that is miscible with polyisoprene and has conjugated dienes that undergo a Diels Alder reaction and (ii) a polyhalogenated cyclopentadiene represented by:

wherein X is a fluorine, chlorine or bromine and Y is fluorine, chlorine, bromine or alkoxy having 1 to 4 carbons.

2. The vulcanized rubber of claim 1 , wherein the amount of halogen in the halogenated unsaturated polymer is 5 percent to 60 percent by weight of the halogenated unsaturated polymer.

3. The vulcanized rubber of claim 1 , wherein the vulcanized rubber is crosslinked with sulfur.

4. The vulcanized rubber of claim 3 , wherein the sulfur is present in the vulcanized rubber in an amount from 0.1 percent to 5 percent by weight of the vulcanized rubber.

5. The vulcanized rubber of claim 1 , wherein the unsaturated polymer is polybutadiene comprised of at least 30% by weight 1-4 cis butadiene units.

6. The vulcanized rubber of claim 5 , wherein the polybutadiene has at least 90% by weight 1-4 cis butadiene units.

7. A method of forming a vulcanized rubber of claim 1 comprising:
a) mixing a halogenated unsaturated polymer into polyisoprene to form a vulcanizable polymer blend, wherein the halogenated unsaturated polymer is a reaction product of (i) an unsaturated polymer that is miscible with polyisoprene and has conjugated dienes that undergo a Diels Alder reaction and (ii) a polyhalogenated cyclopentadiene represented by:

wherein X is a fluorine, chlorine or bromine and Y is fluorine, chlorine, bromine or alkoxy having 1 to 4 carbons,
b) adding a vulcanization material to the vulcanizable polymer blend, and
c) vulcanizing the vulcanizable polymer blend to form the vulcanized rubber.

8. The method of claim 7 , wherein the vulcanization material is sulfur, a compound of sulfur, or a peroxide.

9. The method of claim 8 , wherein the vulcanization material is sulfur.

10. The method of claim 7 , wherein the polyhalogenated cyclopentadiene is hexachlorocyclopentadiene, hexabromoocyclopentadiene; 5,5-dibromotetrachlorocyclopentadiene; 5, 5 - difluorotetrachlorocyclop entadiene; 5,5-dibromotetrachlorocyclopentadiene; diethoxytetrachlorocyclopentadiene or mixture thereof.

11. The method of claim 10 , wherein the polyhalogenated cyclopentadiene is hexachlorocyclopentadiene.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Cassell Roger A
• Mahdi Syed Z
• Walia Parvinder S

Classifications

• C08J3/246 Primary

  Intercrosslinking of at least two polymers · CPC title

• C08J3/26

  of latex · CPC title

• C08L15/00

  Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence) · CPC title

• C08C19/18

  by reaction with hydrocarbons substituted by halogen · CPC title

• C08L7/00

  Compositions of natural rubber · CPC title