Aqueous polyisocyanate crosslinking agents modified with hydrocarboxylic acids and pyrazole-based blocking agents.

摘要

IRAZOL "D. The present invention relates to aqueous or water-soluble polyisocyanates containing a) an isocyanate component and, based on the equivalents of a pyrazole blocking agent, c) I5 at 40% in equivalents of an acid monohydrocarboxylic to provide hydrophilic properties and d) 0 to 15% in equivalents of a difunctional chain extender containing OH and / or NH ~ 2 ~ groups, where the quantities of a) to d) are selected from modonent a) for isocyanate reactive groups of the components b), c) and d) is 10: 0.8 to 1: 1.2 The present invention also relates to a process for preparing such polyisocyanate crosslinking agents and their use in combination with polyhydroxyl compounds that they are soluble and / or dispersible in water as a binder for aqueous oven lacquers.