Lubricant oils and greases containing nanoparticle additives

• US 20070004602A1
• Filed: 05/03/2006
• Published: 01/04/2007
• Est. Priority Date: 05/03/2005
• Status: Active Grant

• Current Assignee: Southwest Research Institute
• Original Assignee: Southwest Research Institute
• Inventors: Waynick, John
• Granted Patent: US 8,507,415 B2
• Time in Patent Office: Days
• US Class Current: 508/392
• CPC Class Codes: C10M 125/10 Metal oxides, hydroxides, carbonates or bicarbonates
• CPC Class Codes: C10M 125/22 Compounds containing sulfur, selenium or tellurium
• CPC Class Codes: C10M 125/24 Compounds containing phosphorus, arsenic or antimony
• CPC Class Codes: C10M 129/26 Carboxylic acids; Salts thereof
• CPC Class Codes: C10M 163/00 Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/00 Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 169/06 Mixtures of thickeners and additives
• CPC Class Codes: C10M 2201/062 Oxides; Hydroxides; Carbonates or bicarbonates
• CPC Class Codes: C10M 2201/084 containing sulfur, selenium or tellurium
• CPC Class Codes: C10M 2201/085 Phosphorus oxides, acids or salts
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/122 monocarboxylic
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10N 2010/02 Groups 1 or 11
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2050/10 Semi-solids; greasy

Abstract

Lubricant oil and grease composition containing an additive package comprising wear-resistant additives in the form of nanoparticles, wherein the additives are a carbonate selected from the group consisting of a carbonate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, a sulfate of a Group 1a alkali metal or a Group 2a alkaline earth metal, a phosphate of a Group 1a alkali metal or Group 2a alkaline earth metal, a carboxylate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, or a combination thereof.

Claims

1. A lubricant oil composition, comprising:

a base oil and an additive package comprising wear-resistant additives in the form of nanoparticles, wherein the additives are a carbonate selected from the group consisting of a carbonate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, a sulfate of a Group 1a alkali metal or a Group 2a alkaline earth metal, a phosphate of a Group 1a alkali metal or Group 2a alkaline earth metal, a carboxylate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, or a combination thereof.

2. The oil of claim 1, wherein the additives have a mean particle size of less than about 100 nanometers.

3. The oil of claim 1, wherein the additives have a mean particle size of from 1 to 100 nanometers.

4. The oil of claim 1, further comprising at least one mixed base overbased phenate, sulfonate, or both.

5. The oil of claim 1, wherein the base oil is present in an amount of at least about 75% by weight based on the total weight of the lubricant oil composition.

6. The oil of claim 1, wherein the base oil is present in an amount of at least 80% based on the total weight of the lubricant oil composition.

7. The oil of claim 1, wherein the base oil is present in an amount of at least 90% based on the total weight of the lubricant oil composition.

8. The oil of claim 1, wherein the additive package is present in an amount up to 10% by weight.

9. The oil of claim 1, wherein the additive package is present in an amount up to 8%.

10. The oil of claim 1, wherein the additive package is present in an amount of at least 0.1%.

11. The oil of claim 1, wherein the additive package is present in an amount of at least 1%.

12. The oil of claim 1, further comprising an anti-wear composition, wherein the anti-wear composition comprises (a) a phenate, a sulfonate, or both;

and (b) a base composition wherein the base composition is (i) a metal carbonate and a metal sulfate, (ii) a metal sulfate and a metal phosphate;

(iii) a metal sulfate and a metal carboxylate;

(iv) a metal phosphate and a metal carboxylate;

or (v) three-way or four-way combination of a metal sulfate, a metal carboxylate, a metal phosphate, and a metal carbonate.

47. A method of lubricating a substrate, comprising applying the oil composition of claim 1 to the substrate.

13. A method of manufacturing a lubricant oil composition, comprising:

combining and mixing a base oil and an additive package comprising wear-resistant additives in the form of nanoparticles, wherein the additives are a carbonate selected from the group consisting of a carbonate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, a sulfate of a Group 1a alkali metal or a Group 2a alkaline earth metal, a phosphate of a Group 1a alkali metal or Group 2a alkaline earth metal, a carboxylate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, or a combination thereof.

14. The method of claim 13, wherein the additives have a mean particle size of less than about 100 nanometers.

15. The method of claim 13, wherein the additives have a mean particle size of from 1 to 100 nanometers.

16. The method of claim 13, further comprising at least one mixed base overbased phenate, sulfonate, or both.

17. The method of claim 13, wherein the base oil is present in an amount of at least about 75% by weight based on the total weight of the lubricant oil composition.

18. The method of claim 13, wherein the base oil is present in an amount of at least 80% based on the total weight of the lubricant oil composition.

19. The method of claim 13, wherein the base oil is present in an amount of at least 90% based on the total weight of the lubricant oil composition.

20. The method of claim 13, wherein the additive package is present in an amount up to 10% by weight.

21. The method of claim 13, wherein the additive package is present in an amount up to 8%.

22. The method of claim 13, wherein the additive package is present in an amount of at least 0.1%.

23. The method of claim 13, wherein the additive package is present in an amount of at least 1%.

24. The method of claim 13, wherein the composition further comprises an anti-wear composition, wherein the anti-wear composition comprises (a) a phenate, a sulfonate, or both;

and (b) a base composition wherein the base composition is (i) a metal carbonate and a metal sulfate, (ii) a metal sulfate and a metal phosphate;

(iii) a metal sulfate and a metal carboxylate;

(iv) a metal phosphate and a metal carboxylate;

or (v) three-way or four-way combination of a metal sulfate, a metal carboxylate, a metal phosphate, and a metal carbonate.

48. A method of lubricating a substrate, comprising applying the grease composition of claim 13 to the substrate.

25. A lubricant grease composition, comprising:

a base oil, a thickener, and an additive package comprising wear-resistant additives in the form of nanoparticles, wherein the additives comprising a carbonate selected from the group consisting of a carbonate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, a phosphate of a Group 1a alkali metal or Group 2a alkaline earth metal, a sulfate of a Group 1a alkali metal or a Group 2a alkaline earth metal, a carboxylate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, or a combination thereof.

26. The composition of claim 25, wherein the additives have a mean particle size of less than about 100 nanometers.

27. The composition of claim 25, wherein the additives have a mean particle size of from 1 to 100 nanometers.

28. The composition of claim 25, further comprising at least one mixed base overbased phenate, sulfonate, or both.

29. The composition of claim 25, wherein the base oil is present in an amount of about 45% to about 90% by weight, 5% to 20% thickener, and 0.5% to 30% nanoparticle additives based on the total weight of the grease composition.

30. The composition of claim 25, wherein the base oil is present in an amount of at least 80% based on the total weight of the lubricant oil composition.

31. The composition of claim 25, wherein the additive package is present in an amount up to 10% by weight.

32. The composition of claim 25, wherein the additive package is present in an amount up to 8%.

33. The composition of claim 25, wherein the additive package is present in an amount of at least 0.1%.

34. The composition of claim 25, wherein the additive package is present in an amount of at least 1%.

35. The composition of claim 25, further comprising an anti-wear composition, wherein the anti-wear composition comprises (a) a phenate, a sulfonate, or both;

and (b) a base composition wherein the base composition is (i) a metal carbonate and a metal sulfate, (ii) a metal sulfate and a metal phosphate;

(iii) a metal sulfate and a metal carboxylate;

(iv) a metal phosphate and a metal carboxylate;

or (v) three-way or four-way combination of a metal sulfate, a metal carboxylate, a metal phosphate, and a metal carbonate.

36. A method of manufacturing a lubricant grease composition, comprising:

combining and mixing a base oil, a thickener, and an additive package comprising wear-resistant additives in the form of nanoparticles, wherein the additives comprising a carbonate selected from the group consisting of a carbonate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, a phosphate of a Group 1a alkali metal or Group 2a alkaline earth metal, a sulfate of a Group 1a alkali metal or a Group 2a alkaline earth metal, a carboxylate of a Group 1a alkali metal and a carbonate of a Group 2a alkaline earth metal, or a combination thereof.

37. The method of claim 36, wherein the additives have a mean particle size of less than about 100 nanometers.

38. The method of claim 36, wherein the additives have a mean particle size of from 1 to 100 nanometers.

39. The method of claim 36, further comprising at least one mixed base overbased phenate, sulfonate, or both.

40. The method of claim 36, wherein the base oil is present in an amount of about 45% to about 90% by weight, 5% to 20% thickener, and 0.5% to 30% nanoparticle additives based on the total weight of the grease composition.

41. The method of claim 36, wherein the base oil is present in an amount of at least 80% based on the total weight of the lubricant oil composition.

42. The method of claim 36, wherein the additive package is present in an amount up to 10% by weight.

43. The method of claim 36, wherein the additive package is present in an amount up to 8%.

44. The method of claim 36, wherein the additive package is present in an amount of at least 0.1%.

45. The method of claim 36, wherein the additive package is present in an amount of at least 1%.

46. The method of claim 36, wherein the composition further comprises an anti-wear composition, wherein the anti-wear composition comprises (a) a phenate, a sulfonate, or both;

and (b) a base composition wherein the base composition is (i) a metal carbonate and a metal sulfate, (ii) a metal sulfate and a metal phosphate;

(iii) a metal sulfate and a metal carboxylate;

(iv) a metal phosphate and a metal carboxylate;

or (v) three-way or four-way combination of a metal sulfate, a metal carboxylate, a metal phosphate, and a metal carbonate.