(57) This invention relates to a composition, comprising: (A) a compound represented by
the formula
wherein in Formula (A-I): R1, R2 and R3 are independently hydrogen or hydrocarbyl groups; X is O or S; n is zero, 1 or 2;
and T is a hydrocarbyl group, a hetero group, a hydroxyhydrocarbyl group, or an activating
group; with the proviso that when n is zero, T can be a metal, and when n is 2, each
R2 and R3 can be the same or different; and (B) an acylated nitrogen-containing compound having
a substituent of at least about 10 carbon atoms. In one embodiment, the inventive
composition further comprises (C) a phosphorus compound. In one embodiment, the inventive
composition further comprises (D) an organic sulfide. In one embodiment, the inventive
composition further comprises (E) a heterocyclic compound. In one embodiment, the
inventive composition further comprises (F) a thiocarbamate. In one embodiment, the
invention relates to a process comprising mixing the foregoing components (A) and
(B) with an oil of lubricating viscosity, and, optionally, one or more of the foregoing
components (C), (D), (E) and/or (F). The inventive compositions are useful in formulating
lubricating compositions and functional fluids characterized by enhanced antiwear
properties.
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