Seal swell agents for lubricating compositions

Patent metadata

Field	Value
Publication number	US-11174449-B2
Application number	US-201716303163-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 24, 2016
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A composition comprising an oil of lubricating viscosity and a compound represented by formula (I) wherein: x is 0 or 1; R1 is a hydrocarbyl group containing about 4 or about 18 carbon atoms; R2 is an aliphatic hydrocarbyl group containing about 1 to about 12 carbon atoms; and y is 0 or 1, 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; R 1 is a hydrocarbyl group containing 6 to about 18 carbon atoms; R 2 is an aliphatic hydrocarbyl group containing 1 to about 12 carbon atoms; and y is 0; and the oil of lubricating viscosity is a Group II, Group III, Group IV or Gas-to-Liquid (Fischer-Tropsch) base oil, or mixture thereof; and
wherein the compound of formula (I) is present in the composition in an amount of from 0.15 to 2 wt %; and
wherein the oil of lubricating viscosity is present in the composition in an amount of greater than 50 wt %.

2. The composition according to claim 1 , wherein R 1 is an aliphatic hydrocarbyl group containing about 6 to about 12 carbon atoms.

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

4. The composition according to claim 3 , wherein R 1 is selected from the group consisting of n-hexyl, heptyl, 2-ethylhexyl, isooctyl, octyl, nonyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl and, 9-octadecenyl.

5. 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.

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

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

8. 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 .

9. The method according to claim 8 , wherein the mechanical device is a driveline device or an internal combustion engine.

10. The method according to claim 8 , wherein the mechanical device is a gas compressor or a refrigeration system.

11. The method according to claim 8 , wherein the seal is an elastomer.

12. A method of swelling an elastomer seal when in contact with a lubricating composition, said method comprising contacting the elastomer seal with the composition of claim 1 .

13. The method according to claim 12 , wherein the seal is an elastomer chosen from an ethylene acrylic elastomer, a fluoroelastomer, a chloroelastomer, a polyacrylate and a nitrile polymer.

14. The method according to claim 12 , wherein the lubricating composition is an automatic transmission fluid, an off-highway lubricant, an axle gear oil, or an engine oil.

15. The method according to claim 12 , 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

• C10M2219/044

  Sulfonic acids, Derivatives thereof, e.g. neutral salts · CPC title

• C10M135/10 Primary

  Sulfonic acids or derivatives thereof · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10M2203/1025

  used as base material · CPC title

• C10N2040/04

  Oil-bath; Gear-boxes; Automatic transmissions; Traction drives · CPC title