| abstract |
A process to prepare an amine-functional ester of an amino carboxylic acid includes the step of reacting a polyol of the formula (I)HO-A-OH (I)where A is a carbon chain with about 2 to about 36 carbon atoms that is aliphatic linear or branched, saturated or unsaturated, or aromatic, or CH2CH(OH)CH2, CH2C(CH2OH)2CH2, CH2C(CH2OH)(CH3)CH2, CH2C(CH2OH)(CH2CH3)CH2, p-tetrahydrofuran, erythritol or an ester of di- or tricarboxylic acids with ethylene or propylene glycol, and wherein A can optionally be alkoxylated or reacted with hydroxy carboxylic acids, with an aminocarboxylic acid of formula II or its cyclic amide of the formula III, where m is an integer of about 1 to about 8 in formula II and about 3 to about 8 in formula III, each R independently is hydrogen or a C1-C4 alkyl group, or CH2CH2COOH, or CH2COOH, or (CH2)4NH2, in the presence of a Brønsted-Lowry acid. |