Lubricant composition

Patent metadata

Field	Value
Publication number	US-10752860-B2
Application number	US-201716310288-A
Country	US
Kind code	B2
Filing date	Jun 21, 2017
Priority date	Jun 24, 2016
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

An antioxidant package composition including a combination of: (i) at least one aromatic amine, and (ii) at least one polyether sulphide; a lubricant composition including: (a) the above antioxidant package and (b) at least one base oil; a process for preparing the antioxidant package; and a process for preparing the lubricant composition.

First claim

What is claimed is:

1. An antioxidant package composition comprising a combination of: (i) at least one aromatic amine, and (ii) at least one polyether sulphide derived from an alkoxylate derivative of bis(2-hydroxyethyl) sulphide, bis(2-hydroxypropyl) sulphide, bis(2-hydroxybutyl) sulphide, bis(2-hydroxypentyl) sulphide and mixtures thereof.

2. The antioxidant composition of claim 1 , wherein the aromatic amine is an alkylated diphenylamine.

3. The antioxidant composition of claim 1 , wherein the aromatic amine is a butylated/octylated diphenylamine.

4. The antioxidant composition of claim 1 , wherein the polyether sulphide is derived from a propoxylate derivative of bis(2-hydroxyethyl) sulphide.

5. The antioxidant composition of claim 1 , wherein the polyether sulphide is derived from a butoxylate derivative of bis(2-hydroxyethyl) sulphide.

6. The antioxidant composition of claim 1 , wherein the concentration of the aromatic amine in the antioxidant package composition is from about 2 weight percent to about 50 weight percent.

7. The antioxidant composition of claim 1 , wherein the concentration of the aromatic amine in the antioxidant package composition is from about 2 weight percent to about 10 weight percent.

8. The antioxidant composition of claim 1 , wherein the concentration of the polyether sulphide in the antioxidant package composition is from about 50 weight percent to about 98 weight percent.

9. The antioxidant composition of claim 1 , wherein the concentration of the polyether sulphide in the antioxidant package composition is from about 90 weight percent to about 98 weight percent.

10. The antioxidant composition of claim 1 , wherein the concentration of the polyether sulphide in the antioxidant package composition is from about 10 weight percent to about 50 weight percent.

11. A lubricant composition comprising:
(a) at least one base oil,
(b) at least one aromatic amine, and
(c) at least one polyether sulphide derived from an alkoxylate derivative of bis(2-hydroxyethyl) sulphide, bis(2-hydroxypropyl) sulphide, bis(2-hydroxybutyl) sulphide, bis(2-hydroxypentyl) sulphide and mixtures thereof.

12. The lubricant composition of claim 11 , wherein the base oil is a hydrocarbon base oil and the polyether sulphide is oil soluble.

13. The lubricant composition of claim 11 , wherein the base oil is a polyalkylene glycol.

14. The lubricant composition of claim 11 , wherein (a) the base oil is a polyalkylene glycol, (b) the aromatic amine is an alkylated diphenylamine, and (c) the polyether sulphide is a propoxylate derivative of bis(2-hydroxyethyl) sulphide.

15. The lubricant composition of claim 11 , wherein the concentration of a combination of (b) and (c) in the lubricant composition is from about 0.1 weight percent to about 25 weight percent.

16. The lubricant composition of claim 11 , wherein the concentration of the base oil in the lubricant composition is from about 70 weight percent to about 99.9 weight percent.

17. The lubricant composition of claim 11 , wherein the lubricant composition has a thermo-oxidative stability property that is increased compared to the lubricant composition of claim 14 without the at least one polyether sulphide; wherein the percent increase of the thermo-oxidative stability of the lubricant is greater than about 25 percent; and the thermo-oxidative stability is measured by modified Method B of ASTM D2893.

18. A process for preparing lubricant composition comprising admixing:
(a) at least one base oil,
(b) at least one aromatic amine, and
(c) at least one polyether sulphide derived from an alkoxylate derivative of bis(2-hydroxyethyl) sulphide, bis(2-hydroxypropyl) sulphide, bis(2-hydroxybutyl) sulphide, bis(2-hydroxypentyl) sulphide and mixtures thereof.

19. The process of claim 18 , wherein the process is carried out at a temperature of from about 25° C. to about 100° C. with stirring at from about 15 minutes to about 1 hour.

Assignees

• Dow Global Technologies Llc

Inventors

• Greaves Martin R
• Zaugg-Hoozemans Evelyn A

Classifications

• C10M161/00 Primary

  Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential · CPC title

• C10M2221/043

  Polyoxyalkylene ethers with a thioether group · CPC title

• C10N2050/10

  semi-solid; greasy · CPC title

• C10M107/24

  containing monomers having an unsaturated radical bound to an alcohol, aldehyde, ketonic, ether, ketal or acetal radical · CPC title

• C10M2215/26

  Amines · CPC title