FLUOROELASTOMER COMPOSITION FOR COLD SHRINK ARTICLES

• US 20080249240A1
• Filed: 04/06/2007
• Published: 10/09/2008
• Est. Priority Date: 04/06/2007
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Bandyopadhyay, Pradip K.
• Granted Patent: US 7,705,085 B2
• Time in Patent Office: Days
• US Class Current: 524/847
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 5/0058 Biocides; macromolecular substances as carriers for biocide material A01N25/10
• CPC Class Codes: C08K 5/14 Peroxides
• CPC Class Codes: C08L 27/12 containing fluorine atoms

Abstract

A composition includes an elastomeric composition. The elastomeric composition can include a fluoroelastomer composition, and the elastomeric composition is substantially free of an epichlorohydrin composition. The composition can further include a filler material which includes a reinforcement-grade carbon black. The composition can further include a peroxide curative.

Claims

1. A composition comprising:

an elastomeric composition, the elastomeric composition comprising a fluoroelastomer composition, and the elastomeric composition being substantially free of an epichlorohydrin composition;

a filler material, the filler material comprising a reinforcement-grade carbon black and a silica; and

a peroxide curative.

2. The composition as defined by claim 1, wherein the quantity of filler material is in the range of about 10 phr to about 25 phr, and wherein the quantity of peroxide curative is in the range of about 1 phr to about 6 phr.

3. The composition as defined by claim 1, wherein the reinforcement-grade carbon black comprises carbon black having an average particle size of less than about 40 nm.

4. The composition as defined by claim 1, wherein the fumed silica comprises a silane treated fumed silica.

5. The article as defined by claim 1, wherein the composition further comprises a cross-linking agent or cross-linking co-agent.

6. The composition as defined by claim 1, wherein the composition exhibits an elongation greater than 500% and a permanent set less than 25% at room temperature.

7. The composition as defined by claim 1, wherein the composition exhibits an elongation greater than 450% and a permanent set less than 25% at 130 degrees Celsius.

8. The composition as defined by claim 1, wherein the composition exhibits an elongation greater than 400% and a permanent set less than 25% at 150 degrees Celsius.

9. The composition as defined by claim 1, wherein the composition does not tear while being held for seven days in a 200% radially expanded state at 150 degrees Celsius.

10. The composition defined by claim 1, wherein the composition exhibits less than about a 25% weight increase when immersed in diesel fuel for 24 hours at a temperature of about 49 degrees Celsius.

11. The composition defined by claim 1, wherein the composition exhibits less than about a 10% weight increase when immersed in hydraulic fluid for 24 hours at a temperature of about 71 degrees Celsius.

12. A method of use comprising:

(a) providing an elastomeric composition, the elastomeric composition comprising a fluoroelastomer composition, and the elastomeric composition being substantially free of an epichlorohydrin composition;

(b) providing a filler material, the filler material comprising a reinforcement-grade carbon black; and

(c) providing a peroxide curative;

(d) mixing the elastomeric composition, the filler material, and the peroxide curative to form a blend composition; and

(e) curing the blend composition to form a tubular cold shrinkable material; and

(f) installing a removable core inside the tubular cold shrinkable material to support the cold shrinkable material in an expanded state.

13. The method as defined by claim 12, wherein the quantity of filler material is in the range of about 10 phr to about 25 phr, and wherein the quantity of peroxide curative is in the range of about 1 phr to about 6 phr.

14. The method as defined by claim 12, wherein the reinforcement-grade carbon black comprises carbon black having an average particle size of less than about 40 nm.

15. The method as defined by claim 12, wherein the filler material further comprises a silane treated filmed silica.

16. The method as defined by claim 12, wherein the composition further comprises a cross-linking agent or cross-linking co-agent.

17. The method as defined by claim 12, further comprising exhibiting an elongation greater than 500% and a permanent set less than 25% at room temperature.

18. The method as defined by claim 12, further comprising exhibiting an elongation greater than 450% and a permanent set less than 25% at 130 degrees Celsius.

19. The method as defined by claim 12, further comprising exhibiting an elongation greater than 400% and a permanent set less than 25% at 150 degrees Celsius.

20. The method as defined by claim 12, further comprising the absence of tearing while being held for seven days in a 200% radially expanded state at 150 degrees Celsius.