polyurethane, aqueous dispersions, flexo or gravure ink, use of an aqueous dispersion, and process for printing a substrate

摘要

1/1 Summary "Polyurethane, aqueous dispersions, flexographic or rotogravure ink, use of an aqueous dispersion, and process for printing a substrate" The present invention relates to polyurethanes (a) being obtained by reaction of (a) 15% to 70% by weight of di- or polyisocyanate comprising on average from 1 to 10 allophanate groups and on average from 1 to 10 10 cc double bonds per molecule, and optionally (b) 0% to 60% by weight of further di- or polyisocyanate with (c) 5% to 50% by weight of compounds of at least two reactive isocyanate groups, comprising at least one diol polycarbonate having a molecular weight of 500 to 3000 g / mol% by weight being based on total polyurethane (a), provided that the total is 100 %.