Patent ID: 8785557

Claim:
A process for preparing an aqueous acrylate-alkyd polymer dispersion (PD) by free-radical emulsion polymerization of (a) at least one α,β-ethylenically unsaturated monomer (M), (b) and at least one further monomer (M1) selected from the group consisting of esters of α,β-ethylenically unsaturated monocarboxylic and dicarboxylic acids with C 1 -C 20 alkanols, vinylaromatics, esters of vinyl alcohol with C 1 -C 30 monocarboxylic acids, ethylenically unsaturated nitriles, vinyl halides, vinylidene halides, and mixtures thereof, to give a polymer (P), (c) optionally, subsequent chemical deodorization and (d) addition of at least one water-soluble alkyd resin having a weight-average molecular weight of between 5000 and 40,000 Da, or of at least one aqueous alkyd emulsion or polyurethane-alkyd emulsion, which comprises adding the alkyd resin or the alkyd emulsion or polyurethane-alkyd emulsion, the temperature at addition being 60 to 99° C., either subsequent to the polymerization of M and M1, with an afterstir time of 0-2 h or subsequent to the chemical deodorization when carried out, with an afterstir time of 0-2 h.