Patent ID: 6187860
Filing Date: 2001-02-13
Classification: C08G,C09D

Abstract:
An aqueous or water dilutable blocked polyisocyanate comprisinga) a polyisocyanate component and, based on the equivalents of isocyanate groups,b) 60 to 85 equivalent % of a pyrazole blocking agent,c) 15 to 40 equivalent % of a monohydroxycarboxylic acid to impart hydrophilic properties andd) 0 to 15 equivalent % of a difunctional chain extender containing OH and/or NH.sub.2 groups,wherein the amounts of a) to d) are selected such that the equivalent ratio of NCO groups of component a) to isocyanate-reactive groups of components b), c) and d) is 1:0.8 to 1:1.2.