Lubricating oil compositions with engine wear protection and solubility

Patent metadata

Field	Value
Publication number	US-9926509-B2
Application number	US-201614997808-A
Country	US
Kind code	B2
Filing date	Jan 18, 2016
Priority date	Jan 19, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A method for improving wear control in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition that includes a lubricating oil base stock as a major component; and at least one phosphazene represented by the formula

as a minor component. In the above formula, Q is nitrogen, sulfur or oxygen; a is a value from about 2 to about 6, c is a value from about 2 to about 6, e is a value from about 2 to about 6, g is a value from about 2 to about 6, i is a value from about 2 to about 6, and k is a value from about 2 to about 6; b is a value of 2a+q, d is a value of 2c+r, f is a value of 2e+s, h is a value of 2g+t, j is a value of 2i+u, and l is a value of 2k+v; q, r, s, t, u and v are independently a value of 0 or −2; with the proviso that not all of a, c, e, g, i and k are the same value. A lubricating oil having a composition that includes a lubricating oil base stock as a major component; and at least one phosphazene represented by the above formula as a minor component. The lubricating oil is useful in internal combustion engines.

First claim

What is claimed is:

1. A method for improving wear control in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising a lubricating oil base stock as a major component; and at least one phosphazene represented by the formula

as a minor component; wherein Q is nitrogen, sulfur or oxygen; a is a value from about 2 to about 6, c is a value from about 2 to about 6, e is a value from about 2 to about 6, g is a value from about 2 to about 6, i is a value from about 2 to about 6, and k is a value from about 2 to about 6; b is a value of 2a+q, d is a value of 2c+r, f is a value of 2e+s, h is a value of 2g+t, j is a value of 2i+u, and l is a value of 2k+v; q, r, s, t, u and v are independently a value of 0 or −2; with the proviso that not all of a, c, e, g, i and k are the same value; and wherein wear control is improved as compared to wear control achieved using a lubricating oil containing a minor component other than the phosphazene, wherein the other mechanical component is selected from the group consisting of power trains, drivelines, transmissions, gears, gear trains, gear sets, compressors, pumps, hydraulic systems, bearings, bushings and turbines.

2. The method of claim 1 wherein a, c, e, g, i and k are a value of 3 (propyl) or 4 (butyl).

3. The method of claim 1 wherein the phosphazene is represented by the formula

4. The method of claim 1 wherein the lubricating oil base stock comprises a Group I, Group II, Group III, Group IV or Group V base oil.

5. The method of claim 1 wherein the at least one phosphazene is present in an amount of from about 0.01 weight percent to about 5 weight percent, based on the total weight of the formulated oil.

6. The method of claim 1 wherein the phosphazene is present in an amount less than about 2 weight percent, based on the total weight of the formulated oil.

7. The method of claim 1 wherein the phosphazene is present in an amount less than about 1 weight percent, based on the total weight of the formulated oil.

8. The method of claim 1 wherein the lubricating oil base stock is present in an amount of from about 70 weight percent to about 95 weight percent, based on the total weight of the formulated oil.

9. The method of claim 1 wherein the formulated oil further comprises one or more of an antiwear additive, viscosity modifier, antioxidant, detergent, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, and anti-rust additive.

10. A lubricating oil having a composition comprising a lubricating oil base stock as a major component; and at least one phosphazene represented by the formula

as a minor component; wherein Q is nitrogen, sulfur or oxygen; a is a value from about 2 to about 6, c is a value from about 2 to about 6, e is a value from about 2 to about 6, g is a value from about 2 to about 6, i is a value from about 2 to about 6, and k is a value from about 2 to about 6; b is a value of 2a+q, d is a value of 2c+r, f is a value of 2e+s, h is a value of 2g+t, j is a value of 2i+u, and l is a value of 2k+v; q, r, s, t, u and v are independently a value of 0 or −2; with the proviso that not all of a, c, e, g, i and k are the same value; and wherein wear control is improved as compared to wear control achieved using a lubricating oil containing a minor component other than the phosphazene.

11. The lubricating oil of claim 10 wherein a, c, e, g, i and k are a value of 3 (propyl) or 4 (butyl).

12. The lubricating oil of claim 10 wherein the phosphazene is represented by the formula

13. The lubricating oil of claim 10 wherein the lubricating oil base stock comprises a Group I, Group II, Group III, Group IV or Group V base oil.

14. The lubricating oil of claim 10 wherein the at least one phosphazene is present in an amount of from about 0.01 weight percent to about 5 weight percent, based on the total weight of the formulated oil.

15. The lubricating oil of claim 10 wherein the phosphazene is present in an amount less than about 2 weight percent, based on the total weight of the formulated oil.

16. The lubricating oil of claim 10 wherein the phosphazene is present in an amount less than about 1 weight percent, based on the total weight of the formulated oil.

17. The lubricating oil of claim 10 wherein the lubricating oil base stock is present in an amount of from about 70 weight percent to about 95 weight percent, based on the total weight of the formulated oil.

18. The lubricating oil of claim 10 further comprising one or more of an antiwear additive, viscosity modifier, antioxidant, detergent, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, and anti-rust additive.

19. The lubricating oil of claim 10 which is a passenger vehicle engine oil (PVEO).

20. A method for reducing sulfur and metals and their harmful side effects of exhaust catalyst poisoning and increased corrosivity in an engine or other mechanical component lubricated with a lubricating oil by including at least one phosphazene represented by the formula

in the lubricating oil; wherein Q is nitrogen, sulfur or oxygen; a is a value from about 2 to about 6, c is a value from about 2 to about 6, e is a value from about 2 to about 6, g is a value from about 2 to about 6, i is a value from about 2 to about 6, and k is a value from about 2 to about 6; b is a value of 2a+q, d is a value of 2c+r, f is a value of 2e+s, h is a value of 2g+t, j is a value of 2i+u, and l is a value of 2k+v; q, r, s, t, u and v are independently a value of 0 or −2; with the proviso that not all of a, c, e, g, i and k are the same value; and wherein the at least one phosphazene is present in an amount from about 0.01 weight percent to about 2 weight percent, based on the total weight of the lubricating oil, wherein the other mechanical component is selected from the group consisting of power trains, drivelines, transmissions, gears, gear trains, gear sets, compressors, pumps, hydraulic systems, bearings, bushings and turbines.

21. The method of claim 20 wherein a, c, e, g, i and k are a value of 3 (propyl) or 4 (butyl).

22. The method of claim 20 wherein the phosphazene is represented by the formula

23. A lubricating oil having a composition comprising a lubricating oil base stock as a major component, and at least one phosphazene represented by the formula

as a minor component; wherein Q is nitrogen, sulfur or oxygen; a is a value from about 2 to about 6, c is a value from about 2 to about 6, e is a value from about 2 to about 6, g is a value from about 2 to about 6, i is a value

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Schilowitz Alan M
• Ng Man Kit
• Baillargeon David J
• Chen Chen
• Allcock Harry R
• Hess Andrew R

Classifications

• C10M137/16 Primary

  having a phosphorus-to-nitrogen bond · CPC title

• C10N2030/43

  Sulfur free or low sulfur content compositions · CPC title

• C10N2030/54

  Fuel economy · CPC title

• C10M2203/1006

  used as base material · CPC title

• C10M107/02

  Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation · CPC title