Seal swell agents for lubricating compositions

Patent metadata

Field	Value
Publication number	US-10808199-B2
Application number	US-201716303161-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 24, 2016
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A composition comprising an oil of lubricating viscosity and a compound represented by formula (I) wherein x is 0 or 1 and R 1 is a hydrocarbyl group containing about 4 to about 18 carbon atoms, which composition is effective at swelling seals.

First claim

What is claimed is:

1. A composition comprising an oil of lubricating viscosity and a compound represented by formula (I)

wherein x is 0 or 1 and R 1 is a hydrocarbyl group containing about 4 to about 18 carbon atoms.

2. The composition according to claim 1 , wherein R 1 is a hydrocarbyl group containing about 6 to about 18 carbon atoms.

3. The composition according to claim 1 , wherein R 1 is an aliphatic hydrocarbyl group.

4. The composition according to claim 3 , wherein R 1 is a branched or linear alkyl or alkenyl group.

5. The composition according to claim 1 , wherein R 1 is chosen from isobutyl, n-butyl, sec-butyl, n-hexyl, heptyl, 2-ethylhexyl, isooctyl, octyl, nonyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, and 9-octadecenyl.

6. The composition according to claim 1 , wherein x is 1.

7. The composition according to claim 6 , wherein R 1 occupies the para position on the aromatic ring.

8. The composition according to claim 1 , wherein x is 0.

9. The composition according to claim 1 , wherein the oil of lubricating viscosity is a Group II, Group III, Group IV or Gas-to-Liquid (Fischer-Tropsch) base oil, or mixtures thereof.

10. The composition according to claim 1 , wherein the composition comprises one or more components selected from the group of dispersants, detergents, metal salts of a phosphorus acid, friction modifiers, viscosity modifiers and antioxidants.

11. The composition according to claim 1 , wherein the composition is a lubricant for a driveline device or an internal combustion engine.

12. The composition according to claim 1 , wherein the composition is a lubricant for a gas compressor or a refrigeration system.

13. A method of preparing a composition which is defined in claim 1 , said method comprising mixing the compound represented by formula (I)

wherein x is 0 or 1 and R 1 is a hydrocarbyl group containing about 4 to about 18 carbon atoms, with the oil of lubricating viscosity.

14. A method of lubricating a mechanical device which has a seal in contact with a lubricating composition, said method comprising supplying to said device a composition according to claim 1 .

15. The method according to claim 14 , wherein the mechanical device is a driveline device or an internal combustion engine.

16. The method according to claim 14 , wherein the mechanical device is a gas compressor or a refrigeration system.

17. The method according to claim 14 , wherein the seal is an elastomer.

18. A method of swelling an elastomer seal, said method comprising contacting said elastomer seal with a composition comprising an oil of lubricating viscosity and a compound represented by formula (I)

wherein x is 0 or 1 and R 1 is a hydrocarbyl group containing about 4 to about 18 carbon atoms.

19. The method according to claim 18 , wherein R 1 is a hydrocarbyl group containing about 6 to about 18 carbon atoms.

20. The method according to claim 18 , wherein the seal is an elastomer chosen from an ethylene acrylic elastomer, a fluoroelastomer, a polyacrylate and a nitrile polymer.

21. The method according to claim 13 , wherein the lubricating composition is an automatic transmission fluid, axle gear oil, or an engine oil.

22. The method according to claim 13 , wherein the lubricating composition is a gas compressor lubricant or a lubricant for a refrigeration system.

Assignees

• Lubrizol Corp

Inventors

• Hussain Mahmud M
• Miatt Peter

Classifications

• C10M135/36 Primary

  the ring containing sulfur and carbon with nitrogen or oxygen · CPC title

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10M2219/104

  containing sulfur and carbon with nitrogen or oxygen in the ring · CPC title

• C10M2203/003

  used as base material · CPC title