Aqueous polyurethane resin dispersion, their preparation and for this purpose suitable poly urethane macromers, and their use in aqueous coating compositions

摘要

aqueous dispersions of polyurethanharzen are described with einpolymerisierten monomers, their production, the usable polyurethanmakromonomere and the use of the dispersions in aqueous u00fcberzugsmitteln, particularly suitable for multistage coating.the aqueous dispersions are obtainable by implementing in aqueous or non aqueous phase of $(a) one or more polyurethanharzen, the at least one ch - and poultry group, at least one ionic group, an ionic group u00fcberfu00fchrbare group and / or non - ionic hydrophi le group, $a and $b, if necessary, oh - and / or nh groups include,the kettenverlu00e4ngerung with $a (c) at least one connection, with at least two ch aciden groups can react, $a and before or during the implementation of (a) and (c) one or more olefinische double bond in the polyurethane (a) imports by $a and b) implementation with $a b1) or more of compoundsthe ch - and poultry group and a double bond containing olefinische and / or $a b2) one or more compounds, a olefinische double bond and a ch - aciden groups containing reactive group and / or $a b3) one or more compounds, a olefinische doppelbi when, as well as a group, with - oh or - nh - groups reactive.contain or $a b4) formaldehyde, $a as a not yet present in aqueous phase reaction product of (a), (b) and (c) in the aqueous.