Polyurethane-polyurea dispersions based on polyether-polycarbonate-polyols

An aqueous polyurethane-polyurea dispersion comprising the synthesis components:

• I.1) one or more polyisocyanates,
• I.2) one or more polymeric polyols having molecular weights of 400 to 8000 g/mol, having a hydroxyl number of 22 to 400 mg KOH/g and an OH functionality of 1.5 to 6,
• I.3) one or more compounds having molecular weights of 62 to 400 g/mol and possessing in total two or more hydroxyl and/or amino groups,
• I.4) optionally one or more compounds possessing a hydroxyl or amino group,
• I.5) one or more isocyanate-reactive, ionically or potentially ionically hydrophilicizing compounds, and
• I.6) optionally one or more isocyanate-reactive, nonionically hydrophilicizing compounds,
• wherein the polyol component I.2) contains 60% to 100% by weight of polytetramethylene glycol-based polycarbonate polyols, based on the total amount of component I.2) and the dispersion contains 60% to 90% by weight of the sum of components I.2), based on the total weight of the synthesis components.