Patent ID: 6455632
Filing Date: 2002-09-24
Classification: C08G,C09D,Y10T

Abstract:
An aqueous polyurethane dispersion containing secondary amide groups in the backbone of the polyurethanes, wherein the secondary amide groups (calculated as NHâ€”COâ€”, MW 43) are present in an amount of 1 to 14% by weight, based on the weight of the polyurethanes, and are incorporated by reacting isocyanate groups with a monoamide corresponding to the formulaHâ€”X1â€”R1â€”NHâ€”C(O)â€”R2â€”X2â€”Hâ€ƒâ€ƒ(II) whereinX1 and X2 are the same or different and represent the groups obtained by removing a hydrogen atom from a hydroxy group or a primary or secondary amino group and R1 and R2 are the same or different and represent linear or branched aliphatic hydrocarbon groups that are optionally substituted by groups that do not contain isocyanate-reactive hydrogen atoms.