Production of water-dispersible polyurethanes having ionic groups and hydrophilic side chains

摘要

The present invention relates to water-dispersible polyurethane elastomers having a substantially linear molecular structure, characterized byPP(A) LATERAL POLYALKYLENE OXIDE POLYETHER CHAINS HAVING A CONTENT OF ETHYLENE OXIDE UNITS OF FROM ABOUT 0. 5 TO 10% BY WEIGHT, BASED ON THE POLYURETHANE AS A WHOLE ANDP P(B) A CONTENT OF ═N⊕═, --COO⊖ or --SO.sub.3. crclbar. groups of from about 0.1 to 15 milliequivalents per 100 g, PPTO AQUEOUS DISPERSIONS OF THESE WATER-DISPERSIBLE POLYURETHANE ELASTOMERS AND TO PROCESSES FOR PRODUCING THESE WATER- DISPERSIBLE POLYURETHANE ELASTOMERS.