| abstract |
The invention relates to aqueous polyurethane preparations, containing a polyurethane consisting of at least one organic isocyanate having no lateral alkyl groups, at least one alcohol that is at least bivalent and has a numerical average molecular weight ranging from 400 to 6000, at least one alcohol that is at least bivalent and has a numerical average molecular weig ht ranging from 62 to 399, at least one carboxylic acid having at least one hydroxy group in given proportions. The invention also relates to the use of said preparations and to substrates coated with the inventive preparations.< /SDOAB> |