| abstract |
a) die Vinylester-Monomere bei der Polymerisation zu 50 bisn100 Gew.-%, die (Meth)acrylat-Monomere zu 0 bis 40 Gew.-%nund Ethylen zu mindestens 80 Gew.-% vorgelegt werden und b) die Polymerisation bei einer Temperatur von ≥ 60°C durchgeführtnwird. The invention relates to a process for the preparation of polymers stabilized with polyvinyl alcohols based on vinyl ester, (meth) acrylate and optionally ethylene monomers in the form of their aqueous dispersions and water-redispersible dispersion powders by means of radical-initiated emulsion polymerization or suspension polymerization of one or more monomers from the group of esters of acrylic acid and methacrylic acid with vinyl esters, optionally ethylene, and optionally further monomers copolymerizable therewith, in the presence of one or more protective colloids from the group of polyvinyl alcohols, and optionally drying the aqueous dispersion obtained therewith, characterized in that a) the vinyl ester monomers in the polymerization to 50 to 100 wt .-%, the (meth) acrylate monomers to 0 to 40 wt .-% and ethylene to at least 80 wt .-% and b) the polymerization is carried out at a temperature of ≥ 60 ° C. |