| abstract |
Disclosed is a polyurethane dispersion which dries more quickly and is chemically resistant. Crosslinker I selected from diamine I1 and dihydrazide I2 and polyisocyanate A, polyol B having a number average molar mass M n of at least 400 g / mol, at least two groups reactive to isocyanate And a compound D containing at least one group capable of anion formation, a low-molecular-weight polyol E having no other reactive groups with respect to isocyanate groups, at least one group reactive with isocyanates and at least one Compound F containing an aldehyde-type or ketone-type carbonyl group, containing an active hydrogen that is monofunctional or has a different reactivity with respect to isocyanate, and includes a structural unit derived from compound G different from compound E A self-crosslinkable aqueous polyurethane dispersion containing polyurethane. [Selection figure] None |