Patent attributes
A functional fluid suitable for use in an internal combustion engine is provided, 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 IR1COOR2 (I)in which:R1 is an aliphatic C1-30-hydrocarbon radical; andR2 is hydrogen or alkyl, mono- or polyhydroxyalkyl, or ammonium; with(ii) an alkanol amine of the formula IINHR3R4 (II)wherein R3 and R4 are 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 R3 and R4 are not both hydrogen atoms and that at least one of said residues R3 and R4 carries 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 II 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.
