| 摘要 |
This invention relates to a composition, comprising: (A) a metal, amine or ammonium salt of a compound represented by the formula wherein in Formula (A-I), X1, X2 and X3 and X4 are independently O or S, X1 and X2 can be NR3, a and b are independently zero or 1, and R1, R2 and R3 are independently hydrocarbyl groups and R3 can be hydrogen; and (B) a thiocarbamate represented by the formulaR1R2N-C(X)S-(CR3R4)aZ(B-I)wherein in Formula (B-I), R1, R2, R3 and R4 are independently hydrogen or hydrocarbyl groups, provided that at least one of R1 and R2 is a hydrocarbyl group; X is O or S; a is 1 or 2; and Z is an activating group, a hydrocarbyl group, a hydroxy hydrocarbyl group, a hetero group, or a -SC(X)-NR1R2 group; provided that when a is 2, Z is an activating group. These compositions are useful in providing lubricating oil compositions and functional fluids, especially engine lubricating oils, with enhanced antiwear properties, and in one embodiment enhanced antioxidant properties.
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