Lubricating Composition Containing an Antiwear Agent

• US 20120196778A1
• Filed: 08/11/2010
• Published: 08/02/2012
• Est. Priority Date: 08/18/2009
• Status: Abandoned Application

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Gieselman, Matthew D., Mosier, Patrick E., Sutton, Michael R., Davies, Mark C., Barton, William R.S.
• Application Number:
  US13/389,517
• Publication Number:
  US 20120196778A1
• Time in Patent Office: Days
• US Class Current: 508/370
• CPC Class Codes: C10M 129/44 containing hydroxy groups
• CPC Class Codes: C10M 133/44 Five-membered ring containing nitrogen and carbon only
• CPC Class Codes: C10M 135/10 Sulfonic acids or derivatives thereof
• CPC Class Codes: C10M 137/04 Phosphate esters
• CPC Class Codes: C10M 137/10 Thio derivatives
• CPC Class Codes: C10M 141/10 at least one of them being an organic phosphorus-containing compound
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/042 Epoxides
• CPC Class Codes: C10M 2207/124 containing hydroxy groups; Ethers thereof
• CPC Class Codes: C10M 2207/128 containing hydroxy groups; Ethers thereof
• CPC Class Codes: C10M 2207/24 Epoxidised acids; Ester derivatives thereof
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2207/281 of (cyclo)aliphatic monocarboxylic acids
• CPC Class Codes: C10M 2207/282 of (cyclo)aliphatic oolycarboxylic acids
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2215/02 Amines, e.g. polyalkylene polyamines; Quaternary amines polyalkylene polyamines with eleven or more monomer units C10M2217/046
• CPC Class Codes: C10M 2215/08 Amides
• CPC Class Codes: C10M 2215/082 containing hydroxyl groups; Alkoxylated derivatives
• CPC Class Codes: C10M 2215/086 Imides
• CPC Class Codes: C10M 2215/223 : Five-membered rings containing nitrogen and carbon only
• CPC Class Codes: C10M 2215/224 : Imidazoles
• CPC Class Codes: C10M 2215/28 : Amides; Imides
• CPC Class Codes: C10M 2219/046 : Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/089 : Overbased salts
• CPC Class Codes: C10M 2223/043 : Ammonium or amine salts thereof
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2223/049 : Phosphite
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2030/06 : Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/42 : Phosphor free or low phosphor content compositions
• CPC Class Codes: C10N 2030/43 : Sulfur free or low sulfur content compositions
• CPC Class Codes: C10N 2030/45 : Ash-less or low ash content
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines

Abstract

The invention provides a lubricating composition containing (a) an oil of lubricating viscosity, (b) a phosphite having at least one hydrocarbyl group that has 4 or more carbon atoms, and (c) a compound derived from a hydroxy-carboxylic acid. The invention further relates to the use of the lubricating composition in an internal combustion engine.

Claims

1. A lubricating composition comprising

(a) an oil of lubricating viscosity,

(b) 0.01 wt % to 5 wt % of a phosphite having at least one hydrocarbyl group that has 4 or more carbon atoms, wherein the phosphite having at least one hydrocarbyl group with 4 or more is represented by the formula:

2. The lubricating composition of claim 1, wherein n and m both equal 2.

19. The lubricating composition of claim 1, wherein the compound derived from the hydroxy-carboxylic acid is present at 0.1 wt % to 3 wt % of the lubricating composition.

20. The lubricating composition of claim 1, wherein the compound derived from the hydroxy-carboxylic acid is present at 0.5 wt % to 1 wt % of the lubricating composition

21. The lubricating composition of claim 1, wherein both R³ and R⁴ are hydrocarbyl groups.

22. The lubricating composition of claim 1, wherein the phosphite has at least one hydrocarbyl group with 14 to 20 carbon atoms.

23. The lubricating composition of claim 1, wherein the phosphite has at least one hydrocarbyl group with 16 to 18 carbon atoms.

24. The lubricating composition of claim 1, wherein the phosphite having at least one hydrocarbyl group with 4 or more carbon atoms is present at 0.1 wt % to 3 wt %, of the lubricating composition.

25. The lubricating composition of claim 1, wherein the phosphite having at least one hydrocarbyl group with 4 or more carbon atoms is present at 0.5 wt % to 1 wt % of the lubricating composition.

26. The lubricating composition of claim 1, wherein the phosphite having at least one hydrocarbyl group with 4 or more carbon atoms and the compound derived from the hydroxy-carboxylic acid are both present in an amount in the range of 0.1 wt % to 3 wt % and 0.1 wt % to 3 wt % respectively of the lubricating composition.

27. The lubricating composition of claim 1, wherein the phosphite having at least one hydrocarbyl group with 4 or more carbon atoms and the compound derived from the hydroxy-carboxylic acid are both present in an amount in the range of 0.5 wt % to 1 wt % and 0.5 wt % to 1 wt % respectively of the lubricating composition.

28. The lubricating composition of claim 1 further comprising a zinc dialkyldithiophosphate, or mixtures thereof, wherein the zinc dialkyldithiophosphate is present at 0.75 wt % to 1.5 wt % of the lubricating composition.

29. The lubricating composition of claim 1, wherein the lubricating composition is characterised as having (i) a sulphur content of 0.5 wt % or less, (ii) a phosphorus content of 0.1 wt % or less, and (iii) a sulphated ash content of 1.5 wt % or less.

30. The lubricating composition of claim 1 further comprising at least one of an antiwear agent, a dispersant viscosity modifier, a friction modifier, a viscosity modifier, an antioxidant, an overbased detergent, or mixtures thereof.

31. The lubricating composition of claim 1 further comprising an overbased detergent, wherein the overbased detergent is selected from the group consisting of phenates, sulphur containing phenates, sulphonates, salixarates, salicylates, and mixtures thereof.

32. A method of lubricating an internal combustion engine comprising supplying to the internal combustion engine the lubricating composition of claim 1.

33. The method of claim 32, wherein the internal combustion engine has surfaces of an aluminium alloy, or aluminium composite.

34. The method of claim 33, wherein the aluminium alloy is a eutectic or hyper-eutectic aluminium alloy.

35. The method of claim 34, wherein the aluminium alloy is derived from an aluminium silicate.

36. The method of claim 32, wherein the internal combustion engine has surfaces of steel.

3-18. -18. (canceled)