Lubricating oils containing molybdenyl chelates

• US 4,383,931 A
• Filed: 12/02/1981
• Issued: 05/17/1983
• Est. Priority Date: 12/02/1981
• Status: Expired due to Fees

• Current Assignee: Chevron Research Company (Chevron Corp.)
• Original Assignee: Gulf Research & Development Company
• Inventors: Ryu, Yumi P., Hartle, Robert J.
• Primary Examiner(s): Howard, Jacqueline V.
• Application Number:
  US06/326,698
• Time in Patent Office: 531 Days
• Field of Search: 252/32.7 E, 252/42.7, 252/49.7, 252/47, 252/327 HC
• US Class Current: 508/342
• CPC Class Codes: C10M 135/02 Sulfurised compounds
• CPC Class Codes: C10M 135/04 Hydrocarbons
• CPC Class Codes: C10M 135/06 Esters, e.g. fats
• CPC Class Codes: C10M 135/16 thiourea type, i.e. containing the group
• CPC Class Codes: C10M 135/18 thiocarbamic type, e.g. containing the groups
• CPC Class Codes: C10M 135/30 containing hydroxy groups; Derivatives thereof
• CPC Class Codes: C10M 137/10 Thio derivatives
• CPC Class Codes: C10M 159/18 Complexes with metals
• 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 2205/028 containing aliphatic monomers having more than four carbon atoms
• CPC Class Codes: C10M 2207/09 Metal enolates, i.e. keto-enol metal complexes
• CPC Class Codes: C10M 2219/02 Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
• CPC Class Codes: C10M 2219/022 of hydrocarbons, e.g. olefines
• CPC Class Codes: C10M 2219/024 of esters, e.g. fats
• CPC Class Codes: C10M 2219/064 Thiourea type compounds
• CPC Class Codes: C10M 2219/066 Thiocarbamic type compounds
• 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 2223/12 : obtained by phosphorisation of organic compounds, e.g. with PxSy, PxSyHal or PxOy
• CPC Class Codes: C10M 2225/04 : obtained by phosphorisation of macromolecualr compounds not containing phosphorus in the monomers
• CPC Class Codes: C10M 2227/09 : Complexes with metals
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16

Abstract

The antifriction properties of a lubricating oil are enhanced by the addition of a minor amount of an oil-soluble molybdenyl bis-β-diketonate. The antifriction properties are particularly enhanced when the molybdenyl bis-β-diketonate is used in combination with an oil-soluble active sulfur donor, such as a zinc dialkyldithiophosphate.

Claims

1. A lubricating oil composition having improved antifriction properties comprising a major portion of a hydrocarbon lubricating oil and in solution (a) between about 0.01 and about five weight percent of an active organic sulfur donor and (b) between about 0.05 and about six weight percent of a molybdenyl bis-β

-diketonate having the general formula;

##STR6## where R and R'"'"' are independently selected from the group consisting of alkyl, aryl, aralkyl, alkaryl and cycloalkyl radicals containing from one to about twelve carbon atoms, and the sum of the carbon atoms in R and R'"'"' is three to about 24 carbon atoms.

2. A lubricating oil composition in accordance with claim 1 in which R and R'"'"' are independently selected from branched-chain alkyl having from three to about eight carbon atoms.

3. A lubricating oil composition in accordance with claim 1 in which R and R'"'"' independently contain from one to about six carbon atoms, and the sum of the carbon atoms in R and R'"'"' is from three to about twelve.

4. A lubricating oil composition in accordance with claim 1 in which the lubricating oil composition comprises between about 0.2 and about three weight percent of the molybdenyl bis-β

-diketonate.

5. A lubricating oil composition in accordance with claim 1 in which the sulfur donor is selected from metal dihydrocarbyldithiophosphates and the corresponding precursor esters thereof, metal dihydrocarbyldithiocarbamates, methylene bisdihydrocarbyldithiocarbamates, phosphorosulfurized pinenes, sulfurized olefins and hydrocarbons, sulfurized fatty esters and sulfurized alkyl phenols.

6. A lubricating oil composition in accordance with claim 5 in which the lubricating oil composition comprises from about 0.2 to about two weight percent of the active sulfur donor.