Polyurethane dispersion (pud) with improved isopropanol resistance, flexibility and softness

As described the isocyanate functional polyurethane prepolymer and in a prepolymer preparing the aqueous dispersion, for producing the alcohol solvent high the material. The phenol to prevent the material of the reaction system: A) diisocyanate, which is selected from i) an aliphatic and/or the cyclic diisocyanate, ii) aromatic diisocyanate and an aliphatic and/or the cyclic diisocyanate dinitrate's mixture, B) includes one or polyhydroxylated, wherein the number-average molecular weight of 700 to about 16000, and C) optionally, the number-average molecule weight less than 700 divalent and/or polyhydroxylated, the premise, is a) component A), B) or (C) at least one functional is greater than 2; and b), wherein component A) and (B) is a function, wherein component C) is of the general formula of the R- (OH) 3 or triatomic, wherein r has anCarbon atoms and a linear or branched aliphatic group.