| 摘要 |
The invention relates to a method for producing powdery coating agents from aqueous polymer dispersions, containing i) as component A a polymer, obtained by radical polymerization, made of a) N,N-diethylaminoethyl methacrylate, and b) at least one radically polymerizable compound, selected among esters of a,ß-ethylenically unsaturated monocarboxylic and dicarboxylic acids containing C1-C8-alkanols, characterized in that the aqueous polymer dispersion is transferred into a powder by spray methods in the presence of a drying gas, wherein the input temperature of the drying gas in the spray device is at least 20ºC above the glass transition temperature and at least 20ºC above the minimum film formation temperature of the polymer, and the output temperature of the drying gas from the spray device is maintained at 40 to 85ºC. |
