Lubricating oil composition

• US 4,178,258 A
• Filed: 05/18/1978
• Issued: 12/11/1979
• Est. Priority Date: 05/18/1978
• Status: Expired due to Term

• Current Assignee: Edwin Cooper and Company Limited
• Original Assignee: Edwin Cooper and Company Limited
• Inventors: Papay, Andrew G., Zaweski, Edward F.
• Primary Examiner(s): Vaughn, Irving
• Application Number:
  US05/907,159
• Time in Patent Office: 572 Days
• Field of Search: 252/32.7 E, 252/33.6
• US Class Current: 508/363
• CPC Class Codes: C10M 135/18 thiocarbamic type, e.g. containing the groups
• CPC Class Codes: C10M 141/10 at least one of them being an organic phosphorus-containing compound
• CPC Class Codes: C10M 2203/06 Well-defined aromatic compounds
• CPC Class Codes: C10M 2205/00 Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
• CPC Class Codes: C10M 2205/028 containing aliphatic monomers having more than four carbon atoms
• CPC Class Codes: C10M 2207/024 having at least two phenol groups but no condensed ring
• CPC Class Codes: C10M 2207/027 Neutral salts thereof
• 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 2207/286 of polymerised unsaturated acids
• CPC Class Codes: C10M 2207/34 Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2217/046 Polyamines, i.e. macromoleculars obtained by condensation of more than eleven amine monomers
• CPC Class Codes: C10M 2217/06 Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• CPC Class Codes: C10M 2219/087 containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
• CPC Class Codes: C10M 2219/088 : Neutral salts
• CPC Class Codes: C10M 2219/089 : Overbased salts
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2225/041 : Hydrocarbon polymers
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16
• CPC Class Codes: F02B 3/06 : with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02

Abstract

Lubricating oil adapted for use in spark ignited and diesel engines containing an antiwear amount of a molybdenum bis(dialkyldithiocarbamate).

Claims

1. A lubricating oil composition suitable for use in the crankcase of an internal combustion engine, said composition comprising a major amount of mineral oil and a minor wear and friction reducing amount of an oil soluble molybdenum bis(dialkyldithiocarbamate).

2. A lubricating oil composition of claim 1 wherein the alkyl groups of said dialkyldithiocarbamate contain about 4-20 carbon atoms.

3. A lubricating oil composition of claim 2 wherein said dialkyldithiocarbamate is molybdenum bis(didodecyldithiocarbamate).

4. A lubricating oil composition of claim 2 wherein said dialkyldithiocarbamate is molybdenum bis[di(2-ethylhexyl)dithiocarbamate].

5. A lubricating oil composition of claim 1 containing an antioxidant amount of an oil soluble zinc dihydrocarbyldithiophosphate which tends to increase engine wear due to blow-by carbon soot in diesel engines and a wear inhibiting amount of an oil soluble molybdenum bis(dialkyldithiocarbamate) which functions to counteract increased engine wear due to said zinc dihydrocarbyldithiophosphate and carbon soot.

6. A lubricating oil composition of claim 5 wherein the alkyl groups of said dialkyldithiocarbamate contain about 4-20 carbon atoms.

7. A lubricating oil composition of claim 6 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis(didodecyldithiocarbamate).

8. A lubricating oil composition of claim 6 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis[di(2-ethylhexyl)dithiocarbamate].

9. A lubricating oil composition of claim 6 wherein said zinc dihydrocarbyl dithiophosphate is a zinc dialkyldithiophosphate wherein the alkyl groups contain about 3-20 carbon atoms.

10. A lubricating oil composition of claim 9 wherein the alkyl groups in said zinc dialkyldithiophosphate are a mixture of isobutyl and amyl alkyl groups.

11. A lubricating oil composition of claim 9 wherein the alkyl groups in said zinc dialkyldithiophosphate are 2-ethylhexyl groups.

12. A lubricating oil composition of claims 10 or 11 wherein said molybdenum bis dialkyldithiocarbamate is molybdenum bis(didodecyldithiocarbamate).

13. A lubricating oil composition of claims 10 or 11 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis[di(2-ethyhexyl)dithiocarbamate].