| 摘要 |
An aqueous dispersion comprising a polyurethane synthesized from a) organic diisocyanates b) dihydroxy compounds having a molar weight of 500 to 5000 g/mol and comprising no ionic group or group that can be converted to an ionic group c) mono- to trihydric alcohols additionally comprising an ionic group d) if appropriate, further compounds other than a) to c), wherein the polyurethane comprises less than 0.6% by weight of urea groups (calculated with a molar weight of 56 g/mol), the ionic group of c) has been at least partly neutralized with an alkali metal cation, and the reaction of compounds a), b), c), and d) does not take place in the presence of a catalyst containing a metal-carbon bond. |
