FUNCTIONAL FLUIDS FOR INTERNAL COMBUSTION ENGINES

摘要

The present invention provides a functional fluid suitable for use in an internal combustion engine, comprising: (a) a major amount of a base fluid; (b) a minor amount of a polysubstituted alkanol amine derivative reaction product obtainable by reacting: (i) a carboxylate compound of formula (I) RCOORin which: Ris an aliphatic C-hydrocarbon radical; and Ris hydrogen oralkyl, mono- or polyhydroxyalkyl, or ammonium; with (ii) an alkanol amine of the formula (II) NHRR, wherein Rand Rare independently selected from hydrogen atoms and linear or branched-chain hydrocarbon groups, the carbon chain of which is optionally interrupted by one or more -NH groups and which optionally has at least one hydroxyl group attached to a carbon atom of the hydrocarbon group, with the proviso that Rand Rare not both hydrogen atoms and that at least one of said residues Rand Rcarries at least one hydroxyl group; in a molar ratio of the -COO- groups of the carboxylate compound of formula (I) to the molar sum of OH and NH groups of the alkanol amine of formula (&Pgr;) in a range and under reaction conditions supporting the formation of a reaction product comprising polysubstituted alkanol amine derivatives; and (c) a minor amount of a detergent additive.