| abstract |
The present invention relates to an aqueous polyurethane dispersion obtainable by the reaction of at least:(A)one polyisocyanate with two or more isocyanate groups, (B)one polyester component comprising(B1) a polyesterpolyol with a mean molecular weight of 300to 900g/Mol, having structural units derived from terephthalic acid, (C) one ionic group introducing compound with at least one sulphonate and/or carboxylate group and at least one isocyanate reactive group, (D) one diol with a mean molecular weight of 62 to 400g/Mol, (E) one polyol with a mean molecular weight of 62 to 400g/Mol, having three or more hydroxyl groups, (F) one amino functional and / or aminohydroxyl functional compound, its use to coat a substrate and a coating obtained by using the dispersion. |