Polyurethane resins containing acid groups

摘要

Water-dilutable polyurethane resin (I) with acid group (where (I) contain components of oil (A), a compound (C) with corresponding acid groups or acid anhydrides groups of reactive functional groups and more-functional isocyanates (D)), is new. Water-dilutable polyurethane resin (I) with acid group (where (I) contain components of oil (A), which are partly unsaturated at least olefinic unsaturated aliphatic acids (B) or their anhydrides (B1), a compound (C) with corresponding acid groups or acid anhydrides groups of reactive functional groups of epoxide, hydroxyl, mercaptane and amino groups, which reacts with (B) or (B1) under the influence of a ester groups, thioester or an acid amide group, where (C) are compounds (C2), which additionally contain sulfonic acids groups or activated carboxylic acids through electron-attractive substituents, and compounds (C1), which additionally contain at least one hydroxyl group, which remains reaction with (B) or (B1), and where at least a proportion of 25% of (C) exists (C2), and more-functional isocyanates (D)), is new. Independent claims are also included for: (1) the preparation of (I); and (2) baking enamels comprising hydroxyl groups exhibiting binding agents, aminoplastic resin and (I).