Aryl diurea-thickened greases
AssigneeGulf Research & Development Company
InventorWayne E. Bailey
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Abstract
A grease composition having improved yield, dropping point, and functional life when used in an antifriction bearing at elevated temperatures comprising a base oil of lubricating viscosity thickened with a specially-defined aryl diurea obtained as the result of reacting critical molar ratios of a mixture of p-toluidine and p-chloroaniline with a toluene diisocyanate. In an especially preferred embodiment the grease composition additionally contains precipitated calcium carbonate in an amount sufficient to obtain a grease having improved e.p. (extreme pressure) properties and an extended functional life.
Claims20
A lubricating grease comprising a base oil of lubricating viscosity thickened to a grease with a mixture of aryl diureas obtained by reacting an aryl amine mixture of p-toluidine and p-chloroaniline with a toluene diisocyanate in the proportion of two moles of said aryl amine mixture per mole of said diisocyanate, the mole ratio of p-toluidine to p-chloroaniline in said aryl amine mixture ranging from about 3:1 to about 17:1.
Dependencies are inferred from the claim text.