Process for preparing an aqueous dispersion of a polyacrylate-modified polyurethane-alkyd resin and the use of such a dispersion

摘要: A process for preparing binders one-component paint systems has the following steps: (I) preparation of a polyurethane-alkyd resin component (A) composed mixture (a) (a1) an unsaturated C6-C30 fatty acid with at least two non-conjugated double bonds, and (a2) conjugated bonds as esterified side polymer chains (A); (b) polyurethane units anionic groups and/or which can be converted into main (II) optional neutralisation in their transfer aqueous dispersion or solution; (III) binder contains acrylate-modified acrylate (A') by polymerising one ethylenically unsaturated, radically polymerisable monomer (c) substantially no other reactive functional besides C-C- bond prepared under step presence radical builder polymerisation initiator.