Enhancing antiwear and friction reducing capability of certain xanthate containing molybdenum sulfide compounds

摘要

It now has been discovered that lubricating compositions containing an additive formed by reacting Mo(CO).sub.6 with dixanthogen can be enhanced by the inclusion in the composition ligands selected from polydentate ligands and mixtures thereof. Thus, the present invention comprises a major amount of an aoil of lubricating viscosity and a minor but effective amount of an additive formed by reacting Mo(CO).sub.6 with dixanthogen of the formula (ROCS.sub.2).sub.2 wherein R is an organo group having a sufficient number of carbon atoms to render the additive soluble in the oil; and a polydentate ligand or mixtures thereof, the mole ratio of additive to ligand being in the range of from about 1:1 to about 1:4.