Aqueous solutions or dispersions of cationic oligourethanes, a process for the production thereof and the use thereof to produce coatings

Abstract From the Canadian patent

The present invention is directed to aqueous solutions or dispersions which may contain blocked polyisocyanates of cationic oligourethanes which are crosslinkable at elevated temperature and contain a) about 0.1 to 3% by weight of ternary or quaternary ammonium ions introduced through Michael adducts of secondary amines having at least one hydroxyl group and specific acrylic acid derivatives b) up to about 2.8Z by weight of tert. amino nitrogen atoms incorporated through Michael adducts of secondary amines having at least one hydroxyl group and specific acrylic acid derivatives and, c) about 0 to 15% by weight of blocked isocyanate groups, provided that the ternary ammonium groups of (a) …