Antiwear composition and method of lubricating driveline device

Patent metadata

Field	Value
Publication number	US-2018258367-A1
Application number	US-201815978627-A
Country	US
Kind code	A1
Filing date	May 14, 2018
Priority date	Aug 18, 2009
Publication date	Sep 13, 2018
Grant date	—

Abstract

The present invention relates to an antiwear agent and lubricating compositions thereof. The invention further provides for a method of lubricating a driveline device application by employing a lubricating composition containing the antiwear agent.

First claim

What is claimed is:

1 . A method for lubricating a driveline device comprising supplying to the driveline device a lubricating composition comprising an oil of lubricating viscosity and an antiwear package wherein the antiwear package comprises
(a) 0.01 wt % to 3 wt % of a derivative of a hydroxycarboxylic acid, wherein the derivative of a hydroxycarboxylic acid is represented by the formula:

wherein
n and m both equal 2;
X is an aliphatic or alicyclic group, or an aliphatic or alicyclic group containing an oxygen atom in the carbon chain, or a substituted group of the foregoing types, said group containing up to 6 carbon atoms and having n+m available points of attachment;
two Ys together representing the nitrogen of an imide structure R—N<formed between two carbonyl groups;
R is a hydrocarbyl group;
each R 2 is independently hydrogen, a hydrocarbyl group or an acyl group, further provided that at least one —OR 2 group is located on a carbon atom within X that is α or β to at least one of the —C(O)—Y—R groups, and
(b) 0.05 wt % to 2 wt % of a phosphorus compound, wherein the phosphorus compound is an amine salt of a phosphate hydrocarbon ester represented by the formula:

wherein
R 3 and R 4 are independently hydrogen or hydrocarbon containing 4 to 40 carbon atoms, with the proviso that at least one is a hydrocarbon group; and
R 5 , R 6 , R 7 and R 8 independently hydrogen or a hydrocarbyl group, with the proviso that at least one is a hydrocarbyl group.

2 . The method of claim 1 , wherein the hydroxy-carboxylic acid is tartaric acid.

3 . The method of claim 1 , wherein the hydroxy-carboxylic acid is present at 0.01 wt % to 1 wt % of the lubricating composition.

4 . The method of claim 1 , wherein the hydroxy-carboxylic acid is present at 0.1 wt % to 0.2 wt % of the lubricating composition.

5 . The method of claim 1 , wherein the phosphorus compound is sulphur-free.

6 . The method of claim 1 , wherein R 3 and R 4 are independently hydrogen or hydrocarbon containing 8 to 18 carbon atoms, with the proviso that at least one is a hydrocarbon group.

7 . The method of claim 1 , wherein the phosphorus compound is a mixture of an amine salt of a phosphate hydrocarbon ester, and a phosphite having at least one hydrocarbyl group with 4 or more carbon atoms.

8 . The method of claim 7 , wherein the phosphite is a mono-hydrocarbyl substituted phosphite, a di-hydrocarbyl substituted phosphite, or a tri-hydrocarbyl substituted phosphite.

9 . The method of claim 7 , wherein the phosphite having at least one hydrocarbyl group with 4 or more carbon atoms is represented by the formulae:

wherein at least two of R 9 , R 10 and R 11 may be a hydrocarbyl group containing at least 4 carbon atoms and the other may be hydrogen or a hydrocarbyl group.

10 . The method of claim 1 , wherein the phosphorus compound is present at 0.1 wt % to 1 wt % of the lubricating composition.

11 . The method of claim 1 , wherein the phosphorus compound is present at 0.2 wt % to 0.4 wt % of the lubricating composition.

12 . The method of claim 1 further comprising an organo-sulphide, wherein the organo-sulphide comprises at least one of a polysulphide, a thiadiazole compound, or mixtures thereof.

13 . The method of claim 1 further comprising a borated polyisobutylene succinimide, or a dimercaptothiadiazole derivative of a polyisobutylene succinimide.

14 . The method of claim 1 , wherein
(a) the derivative of a hydroxycarboxylic acid is present at 0.01 wt % to 1 wt % of the lubricating composition; and (b) wherein the phosphorus compound is present at 0.05 wt % to 2 wt % of the lubricating composition.

15 . The method of claim 1 , wherein
(a) the derivative of a hydroxycarboxylic acid is present at 0.05 wt % to 0.5 wt % of the lubricating composition; and (b) wherein the phosphorus compound is present at 0.1 wt % to 1 wt % of the lubricating composition.

Assignees

• Lubrizol Corp

Inventors

• Najman Morey N
• Baker Mark R
• Marsic Vera M

Classifications

• C10M2223/049

  Phosphite · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10M2219/106

  Thiadiazoles · CPC title

• C10M2215/223

  Five-membered rings containing nitrogen and carbon only · CPC title

• C10M2223/047

  Thioderivatives not containing metallic elements · CPC title