Oil composition and its use in a transmission

• US 20060276352A1
• Filed: 06/02/2005
• Published: 12/07/2006
• Est. Priority Date: 06/02/2005
• Status: Abandoned Application

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: James N. Vinci
• Inventors: Vinci, James N.
• Application Number:
  US11/143,531
• Publication Number:
  US 20060276352A1
• Time in Patent Office: Days
• US Class Current: 508/272
• 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 167/00 Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
• CPC Class Codes: C10M 2205/02 containing acyclic monomers
• CPC Class Codes: C10M 2205/04 containing aromatic monomers, e.g. styrene
• CPC Class Codes: C10M 2207/027 Neutral salts thereof
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2209/08 containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
• CPC Class Codes: C10M 2209/082 monocarboxylic
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2209/086 polycarboxylic, e.g. maleic acid
• 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 2219/044 Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/10 Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
• CPC Class Codes: C10M 2219/106 Thiadiazoles
• 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 2223/047 Thioderivatives not containing metallic elements
• CPC Class Codes: C10M 2223/063 : Ammonium or amine salts
• 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 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/36 : Seal compatibility, e.g. with rubber
• CPC Class Codes: C10N 2040/04 : Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
• CPC Class Codes: C10N 2040/042 : for automatic transmissions
• CPC Class Codes: C10N 2040/044 : for manual transmissions
• CPC Class Codes: C10N 2040/045 : for continuous variable transmission [CVT]
• CPC Class Codes: C10N 2040/046 : for traction drives
• CPC Class Codes: C10N 2060/06 : by epoxydes or oxyalkylation reactions
• CPC Class Codes: C10N 2060/09 : Treatment with nitrogen containing compounds

Abstract

This invention relates to a lubricating composition containing (a) an oil soluble phosphorus amine salt; (b) about 0.0001 wt % to about 0.5 wt % of a metal containing detergent package comprising a phenate and a sulphonate; (c) a dispersant; (d) a dispersant viscosity modifier; (e) a metal deactivator; and (f) an oil of lubricating viscosity, wherein the lubricating composition contains less than about 0.25 wt % of a metal dialkyldithiophosphate. The invention further relates to a method of lubricating a transmission by employing the lubricating composition.

Claims

1. A lubricating composition comprising:

(a) an oil soluble phosphorus amine salt;

(b) about 0.0001 wt % to about 5 wt % of a metal containing detergent package comprising a phenate and a sulphonate;

(c) a dispersant;

(d) a dispersant viscosity modifier;

(e) a metal deactivator; and

(f) an oil of lubricating viscosity,

wherein the lubricating composition contains less than about 0.25 wt % of a metal dialkyldithiophosphate.

2. The lubricating composition of claim 1, wherein phosphorus amine salt is selected from the group consisting of phosphoric acid esters and salts thereof;

dialkyldithiophosphoric acid esters and salts thereof;

amine salts of phosphites; and

amine salts of phosphorus-containing carboxylic esters, ethers, and amides; and

mixtures thereof.

3. The lubricating composition of claim 1, wherein phosphorus amine salt comprises an amine salt of a phosphorus acid ester.

4. The lubricating composition of claim 1, wherein the phosphorus amine salt comprises an amine with C₁₁ to C₁₄ tertiary alkyl primary groups or mixtures thereof.

5. The lubricating composition of claim 1, wherein the phosphorus amine salt comprises an amine with C₁₄ to C₁₈ tertiary alkyl primary amines or mixtures thereof.

6. The lubricating composition of claim 1, wherein the phosphorus amine salt comprises an amine with C₁₈ to C₂₂ tertiary alkyl primary amines or mixtures thereof.

7. The lubricating composition of claim 1, wherein the metal containing detergent package comprises at least 50 wt % of a phenate.

8. The lubricating composition of claim 1, wherein the metal containing detergent comprises calcium sulphonate and calcium phenate.

9. The lubricating composition of claim 1, wherein the dispersant comprises a N-substituted long chain alkyl and/or alkenyl succinimide.

10. The lubricating composition of claim 9, wherein the alkenyl succinimide has an alkenyl group with a number average molecular weight of about 500 to about 2500.

11. The lubricating composition of claim 1, wherein the metal deactivator is selected from the group consisting of benzotriazoles or derivatives thereof, 1,2,4-triazoles, benzimidazoles, 2-alkyldithiobenzimidazoles, 2-alkyldithiobenzothiazoles, 2-(N,N-dialkyldithiocarbamoyl)benzothiazoles, 2,5-bis(alkyl-dithio)-1,3,4-thiadiazoles, 2,5-bis(N,N-dialkyldithio carbamoyl)-1,3,4-thiadiazoles, 2-alkyldithio-5-mercapto thiadiazoles and mixtures thereof.

12. The lubricating composition of claim 1, wherein the metal deactivator comprises 2,5-bis(alkyl-dithio)-1,3,4-thiadiazoles, benzotriazoles or derivatives thereof or mixtures thereof.

13. The lubricating composition of claim 1, wherein the metal hydrocarbyl dithiophosphate is present from about 0 ppm to 1000 ppm.

14. The lubricating composition of claim 1, wherein the lubricating composition is free of a metal hydrocarbyl dithiophosphate.

15. The lubricating composition of claim 1, wherein the dispersant viscosity modifier comprises amine functionalised polyolefins, a poly(meth)acrylate functionalised with an a nitrogen containing compound, an esterified polymer derived from monomers comprising:

(i) a vinyl aromatic monomer; and

(ii) an unsaturated carboxylic acid or derivatives thereof, or mixtures thereof.

16. The lubricating composition of claim 1, wherein the lubricating composition comprises:

(a) about 0.001 wt % to about 5 wt % of an oil soluble phosphorus amine salt;

(b) about 0.01 wt % to about 4 wt % of a metal containing detergent package comprising a phenate and a sulphonate;

(c) about 0.01 wt % to about 4 wt % of a dispersant;

(d) about 0.01 wt % to about 24 wt % of a dispersant viscosity modifier;

(e) about 0.001 wt % to about 1 wt % of a metal deactivator; and

(f) about 44 wt % to about 99.9 wt % of an oil of lubricating viscosity,

wherein the lubricating composition is free of a metal dialkyldithiophosphate.

17. The lubricating composition of claim 1, wherein the lubricating composition is a transmission oil, a driveshaft oil, a gear oil, an axle oil or mixtures thereof.

18. A method of lubricating a synchronised transmission comprising:

(i) employing a lubricating composition comprising;

(a) an oil soluble phosphorus amine salt;

(b) about 0.0001 wt % to about 5 wt % of a metal containing detergent package comprising a phenate and a sulphonate;

(c) a dispersant;

(d) a dispersant viscosity modifier;

(e) a metal deactivator; and

(f) an oil of lubricating viscosity,

wherein the lubricating composition contains less than about 0.25 wt % of a metal dialkyldithiophosphate; and

(ii) lubricating a synchronised transmission with said lubricating composition.

19. The method of claim 18, wherein the transmission is a manual transmission.

20. A method of lubricating a non-synchronised transmission comprising:

(i) employing a lubricating composition comprising;

(a) an oil soluble phosphorus amine salt;

(b) about 0.0001 wt % to about 5 wt % of a metal containing detergent package comprising a phenate and a sulphonate;

(c) a dispersant and/or a dispersant viscosity modifier;

(d) a metal deactivator; and

(e) an oil of lubricating viscosity,

wherein the lubricating composition contains less than about 0.25 wt % of a metal dialkyldithiophosphate; and

(ii) lubricating a non-synchronised transmission with said lubricating composition.

21. A lubricating composition comprising:

(a) about 0.05 wt % to about 2.5 wt % of an oil soluble phosphorus amine salt;

(b) about 0.05 wt % to about 3 wt % of a metal containing detergent package comprising a phenate and a sulphonate;

(c) 0.1 wt % to about 2 wt % of a dispersant;

(d) about 0.1 wt % to about 21 wt % of a dispersant viscosity modifier;

(e) about 0.001 wt % to about 1 wt % of a metal deactivator; and

(f) about 64 wt % to about 99.7 wt % of an oil of lubricating viscosity,

wherein the lubricating composition is free of a metal dialkyldithiophosphate.