| abstract |
The present invention relates to crosslinked, water-soluble or water-dispersible polyurethanes of n A) at least one water-soluble or water-dispersible polyurethane prepolymer having terminal isocyanate groups of n a) at least one compound having a molecular weight in the range from 56 to 300 which contains two active hydrogen atoms per molecule, n b) at least one polymer containing two active hydrogen atoms per molecule, n c) at least one compound which contains two active hydrogen atoms and at least one ionogenic or ionic group per molecule, n d) at least one diisocyanate, n B) at least one polymer containing groups which are reactive toward isocyanate groups, chosen from hydroxyl, and primary and secondary amino and/or carboxyl groups, or the salts thereof. |