| abstract |
Aqueous polyurethane-urea (PUU) dispersions which show film-forming temperatures (MFT) of not more than 20 deg C without using film-forming additives, and which dry at room temperature to give films with a pendulum hardness (DIN 53157) of at least 100 seconds, in which the solid material has urethane and urea group contents of 7-20 and 5-18 wt.% respectively and contains 15-70 wt.% of structural units of formula (I) and/or (II), X = -O- and/or -NA-, with A = H or -(CH2)n-B- (with B = H or X and n = 2). Also claimed are: (i) a process for the production of these PUU dispersions; and (ii) paint containing these dispersions. |