Organo-imido molybdenum complexes as friction modifier additives for lubricant compositions
View Patent ↗Organo-Imino molybdenum complexes are disclosed having the formula Z 2 N 2 MOS 4 C 2 N 2 R 4 wherein Z and R are independently selected from the group consisting of linear hydrocarbon groups, branched hydrocarbon groups, cyclic hydrocarbon groups, and mixtures thereof. The compounds are useful as friction modifiers in lubricants.
1. A composition of matter comprising a compound selected from the group consisting of bis-(tert-butylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI), bis-(tert-octylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI), (tert-octylN) 2 Mo {S 2 CN(Coco) 2 } 2 , and (tert-butylN) 2 Mo{S 2 CN(Coco) 2 } 2 .
2. The composition of claim 1 wherein the compound is bis-(tert-butylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI).
3. The composition of claim 1 wherein the compound is bis-(tert-octylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI).
4. The composition of claim 1 wherein the compound is (tert-octylN) 2 Mo{S 2 CN(Coco) 2 } 2 .
5. The composition of claim 1 wherein the compound is (tert-butylN) 2 Mo{S 2 CN(Coco) 2 } 2 .
6. The composition of claim 1 further comprising a lubricant.
7. The composition of claim 6 wherein the lubricant is a lubricating oil.
8. The composition of claim 6 further comprising at least one additional additive selected from the group consisting of dispersants, detergents, rust inhibitors, antioxidants, sulfurized olefins, thiadiazoles, metal deactivators, anti-wear agents, antifoamants, friction modifiers, seal swell agents, demulsifiers, VI improvers, and pour point depressants.
9. The composition of claim 6 further comprising at least one additional additive selected from the group consisting of alkylated diphenylamines, hindered alkylated phenols, hindered alkylated phenolic esters, sulfur-containing hindered phenolic esters, and sulfur-containing hindered alkylated phenols.
10. The composition of claim 9 wherein at least one additional additive is an alkylated diphenylamine.
11. The composition of claim 10 wherein the alkylated diphenylamine is selected from the group consisting of nonylated diphenylamine, octylated diphenylamine, styrenated diphenylamine, octylated styrenated diphenylamine, and butylated octylated diphenylamine.
12. The composition of claim 6 further comprising a member selected from the group consisting of 3,5-di-t-butyl-4-hydroxy-hydrocinnamic acid, a C 7 -C 9 branched alkylester of 2,6-di-t-butyl-p-cresol, and mixtures thereof.
13. The composition of claim 6 further comprising a member selected from the group consisting of zinc dialkyldithiophosphates, zinc diaryldithiophosphates, and mixtures thereof.
14. The composition of claim 6 further comprising a mixture of at least one alkylated diphenylamine and at least one zinc dialkyldithiophosphate.
15. The composition of claim 14 wherein the mixture further comprises at least one hindered alkylated phenolic.
16. A method for reducing the coefficient of friction of a lubricant comprising adding to said lubricant a compound selected from the group consisting of bis-(tert-butylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI), bis-(tert-octylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI), (tert-octylN) 2 Mo{S 2 CN(Coco) 2 } 2 , and (tert-butylN) 2 Mo{S 2 CN(Coco) 2 } 2 .
17. The method of claim 16 wherein the compound is bis-(tert-butylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI).
18. The method of claim 16 wherein the compound is bis-(tert-octylimido)-bis-diisooctyldithiocarbamato)-molybdenum (VI).
19. The method of claim 16 wherein the compound is (tert-octylN) 2 Mo(S 2 (Coco) 2 ) 2 .
20. The method of claim 16 wherein the compound is (tert-butylN) 2 Mo(S 2 (Coco) 2 ) 2 .
21. The method of claim 16 wherein the lubricant is a lubricating oil.