Additive Compositions
AssigneesInfineum International Limited, Chemtura Corporation
InventorsTushar kanti Bera, Rolfe J. Hartley, Jacob Emert, Jie Cheng, Theodore E. Nalesnik, Robert G. Rowland
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Abstract
Compositions in the form of lubricating oil compositions, greases, fuels or functional fluids containing, in the form of Michael adducts, N-substituted phenylenediamine additives in which at least one of the substituents on the N atoms carries a carbonyl group that is connected to an alkyl, alkoxyalkyl, or alkylthioalkyl group either directly or via an oxygen atom.
Claims20
A composition in the form of a lubricating oil composition, grease, fuel, or functional fluid subject to oxidative degradation, containing, in the form of a Michael adduct, a phenylenediamine additive of the general formula (I)
- R1R2N—Ar—NR3CHR4CHR5COR6 (I)
- wherein:
- R1, R2 and R3 are independently hydrogen atoms, linear or branched alkyl or alkoxyalkyl groups, cycloalkyl rings, or aryl groups, or structure (II) below;
- Ar is an aryl group;
- R4 and R5 are independently hydrogen atoms, or alkyl, alkoxyalkyl or aryl groups;
- R6 is an alkyl, alkoxyalkyl, or alkylthioalkyl group, optionally connected to the carbon atom of the carbonyl group in the above general formula (I) via an oxygen atom;
- structure (II) is represented by the formula
- —CHR7CHR8COR9 (II)
- wherein R7 and R8 are independently hydrogen atoms, or alkyl, alkoxyalkyl or aryl groups;
- and
- R9 is an alkyl, alkoxyalkyl or alkylthioalkyl group and is optionally connected to the carbon atom of the carbonyl group in structure (II) via an oxygen atom;
- the alkyl groups referred to above having from 1 to 36 carbon atoms, and the phenylenediamine being in the form of a free base or as an oil-soluble salt thereof.
The composition of claim to 1 in the form of a lubricating oil composition comprising an oil of lubricating viscosity in a major amount.
Dependencies are inferred from the claim text.