Molybdenum-containing lubricant composition

• US 4,692,256 A
• Filed: 06/06/1986
• Issued: 09/08/1987
• Est. Priority Date: 06/12/1985
• Status: Expired due to Term

• Current Assignee: Adeka Corporation
• Original Assignee: Asahi Denka Kogyo KK (Adeka Corporation)
• Inventors: Hisano, Junichi, Konishi, Masanori, Umemura, Masashi, Okamoto, Toshiaki, Fukushima, Aritoshi
• Primary Examiner(s): Howard, Jacqueline V.
• Application Number:
  US06/871,647
• Time in Patent Office: 459 Days
• Field of Search: 252/32.7 E, 252/46.4, 252/47.5, 252/389.54, 252/400.54
• US Class Current: 508/362
• CPC Class Codes: C10M 133/06 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 135/00 Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
• CPC Class Codes: C10M 135/02 Sulfurised compounds
• CPC Class Codes: C10M 135/18 thiocarbamic type, e.g. containing the groups
• 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 2207/09 Metal enolates, i.e. keto-enol metal complexes
• 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 2219/00 Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
• 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 polyolefins C10M2221/041
• CPC Class Codes: C10M 2219/066 Thiocarbamic type compounds
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• CPC Class Codes: C10M 2219/09 Heterocyclic compounds containing no sulfur, selenium or tellurium compounds in the ring
• 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 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

A lubricant composition comprises as essential ingredients a sulfur compound and an oil-soluble molybdenum compound, obtained by reacting one or more of hexavalent molybdenum compounds selected from the group consisting of molybdenum polyoxide, molybdic acid and the alkali salt thereof or a compound prepared by reaction of the compounds and a reducing agent, with an amino compound represented by the general formula: ##STR1## wherein R₁, R₂ and R₃ which may be identical with or different from each other individually represent hydrogen atoms or hydrocarbon groups of 1 to 30 carbon atom. The lubricant additives comprising the novel molybdenum-amine complex and the sulfur-containing compound in combination are excellent in the anti-oxidation, anti-wear and friction-reducing effect and, particularly, excellent in view of the metal corrosion.

Claims

1. A lubricant composition comprising a blend of a sulfur-containing compound and an oil-soluble molybdenum compound wherein the ratio of sulfur atoms to molybdenum atoms is higher than 0.5, said oil-soluble molybdenum compound having been obtained by reacting (1) at least one hexavalent molybdenum compound selected from the group consisting of molybdenum trioxide, molybdic acid and alkali salts of molybdic acid, with (2) a secondary amino compound having the formula ##STR7## wherein R₂ and R₃, which are the same or different, are hydrocarbon groups having 1 to 30 carbon atoms.

4. A lubricant composition as defined in claim 1 or claim 2, wherein the sulfur-containing compound is a compound represented by the general formula:

##STR9## where respective R₄, which may be identical with or different from each other, represent individually hydrocarbon groups of 3 to 24 carbon atoms.

5. A lubricant composition as defined in claim 1 or claim 2 wherein the sulfur-containing compound is a compound represented by the general formula:

##STR10## where respective R₅, which may be identical with or different from each other, represent individually hydrocarbon groups of 3 to 24 carbon atoms.

6. A lubricant composition as defined in claim 1 or claim 2 wherein the sulfur-containing compound is a compound represented by the general formula:

##STR11## where respective R₆, which may be identical with or different from each other, represent individually hydrocarbon groups of 7 to 24 carbon atoms and X is S or O.

7. A lubricant composition as defined in claim 1 or claim 2 wherein the sulfur-containing compound is a compound represented by the general formula:

##STR12## where respective R₇, which may be identical with or different from each other represent individually hydrocarbon groups of 3 to 24 carbon atoms and X is S or O.

8. A lubricant composition as claimed in claim 1 or claim 2 in which the ratio of molybdenum atom to amine in said oil-soluble molybdenum compound is from 1:

1 to 1;

4.

9. A lubricant composition as claimed in claim 1 or claim 2 wherein said amino compound is selected from the group consisting of ditridecyl amine, di(2-ethylhexyl) amine and dibenzyl amine.

11. A lubricant composition as claimed in claim 1 or claim 2 in which the reaction is carried out in water, an acid is added to neutralize the reaction mixture and then the water is removed and said oil-soluble molybdenum compound is recovered.

2. A lubricant composition comprising a blend of a sulfur-containing compound and an oil-soluble molybdenum compound wherein the ratio of sulfur atoms to molybdenum atoms is higher than 0.5, said oil-soluble molybdenum compound having been obtained by reducing at least one hexavalent molybdenum compound selected from the group consisting of molybdenum trioxide, molybdic acid and alkali salts of molybdic acid, with a reducing agent capable of reducing the molybdenum valency to five or four, whereby to obtain a first reaction product and then reacting said first reaction product with an amino compound having the formula ##STR8## wherein R₁, R₂ and R₃, which are the same or different, are hydrogen or hydrocarbon groups having 1 to 30 carbon atoms, with the proviso that at least one of R₁, R₂ and R₃ is a hydrocarbon group.

3. A lubricant composition as defined in claim 2, wherein the amino compound is a secondary amine having a hydrocarbon group of 6 to 24 carbon atoms.

10. A lubricant composition as claimed in claim 2 wherein said amino compound is selected from the group consisting of ditridecyl amine, di(2-ethylhexyl) amine, dibenzyl amine, tridecyl amine and dimethyllauryl amine.