Patent ID: 6372875
Filing Date: 2002-04-16
Classification: C08G,Y10T

Abstract:
Process for the preparation of polyurethane resins, comprising reacting in ethoxyethyl propionate as solvent,a) at least one compound having 2 functional groups selected from the group consisting of hydroxyl groups, amino groups, and mixtures thereof, b) at least one compound selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, c) at least one compound containing 2 groups which are reactive toward isocyanate groups, these compounds containing, at least in part, at least one group capable of forming anions, wherein components a), b) and c) are reacted to form an intermediate which has terminal isocyante groups and subsequently reacting at least some of the isocyanate groups with d) at least one compound having at least 3 hydroxyl and/or amino groups.