Organomolybdenum-boron additives

Abstract

Disclosed are sulfur and phosphorous free, borated organomolybdenum compositions containing borated alcohols. These compositions can be formulated with ashless antioxidants and low levels of phosphorous containing antiwear compounds to provide improved lubricating compositions.

Description

Claims

1. A composition comprising phosphorous and sulfur free, hydroxyl-containing borated organomolybdenum compound or compounds and at least one borated alcohol having from about 3 to about 35 carbon atoms.

2. The composition of claim 1 wherein the borated organomolybdenum compounds are selected from compounds represented by the Formulae I and II or mixtures thereof

3. The composition of claim 2 wherein the borated alcohols are derived from mono, di and polyalcohols and functional derivatives thereof.

4. The composition of claim 3 wherein the ratio of alcohol to molybdenum compound is in the range of about 19:1 to 1:19.

5. The composition of claim 4 wherein the range of boron to total hydroxyl and groups is in the range of about 1:9 to about 9:1.

6. A lubricant additive composition prepared by boronating a sulfur and phosphorous free organomolybdenum complex or complexes in the presence of an alcohol or mixture of alcohols having from about 3 to about 35 carbon atoms wherein the weight ratio of alcohol to molybdenum complex or complexes is in the range of about 19:1 to about 1:19.

7. The composition of claim 6 wherein the organomolybdenum complex or complexes are prepared by sequentially reacting a fatty oil, a dialkanol amine or di(polyalkoxylated) amine and a molybdenum source.

8. The composition of claim 7 wherein the boronating is conducted with sufficient boronating agent whereby the composition will have a ratio of boron to total hydroxyl groups in the range of about 1:9 to about 9:1.

9. The composition of claim 8 wherein the fatty oil has from about 12 to about 40 carbon atoms and wherein the alkyl groups of the dialkanol amine have from 2 to 4 carbon atoms.

10. The composition of claim 9 wherein the organomolybdenum compound is Molyvan 855™.

11. A lubricant composition comprising a major amount of an oil of lubricating viscosity;an effective amount of a composition comprising phosphorous and sulfur free, hydroxyl-containing borated organomolybdenum compound or compounds and at least one borated alcohol having from about 3 to about 35 carbon atoms;at least one oil soluble, phosphorous-containing antiwear compound in an amount such that the weight percent of total phosphorous in the total lubricating composition is less than about 0.06 wt %; andan effective amount of an ashless antioxidant.

12. The composition of claim 11 wherein the borated organomolybdenum compounds are selected from compounds represented by the Formulae I and II or mixtures thereof

13. The composition of claim 12 wherein the borated alcohols are selected from mono, di and polyalcohols and functional derivatives thereof.

14. The composition of claim 13 wherein the ratio of alcohol to molybdenum compound is in the range of about 19:1 to 1:19.

15. The composition of claim 14 wherein the range of boron to hydroxyl and Mo groups is in the range of about 1:9 to about 9:1.

16. The composition of claim 15 wherein the phosphorous-containing antiwear compound is ZDDP.

17. The composition of claim 16 wherein the ashless antioxidant is a mixture of hindered phenols and arylamines.