Abstract: Disclosed herein is a process of producing a polymeric dispersion by free radical emulsion polymerization of a monomer composition including ethylenically unsaturated monomers in the presence of a block copolymer. The block copolymer has a first block including at least 80 wt.-% units of alkyl acrylate and a second block including units of an ethylenically unsaturated monomer with sulfonic acid groups. Either the first or the second block is connected with a nitroxyl radical. The polymeric dispersion is obtainable by the disclosed process, and the block copolymer is used in the process. Further disclosed herein is a method of using the block copolymer as an emulsifying agent for free radical emulsion polymerization.

Abstract: The presently claimed invention relates to use of an aqueous polymer latex as a binder or co-binder in a waterborne coating composition, wherein the aqueous polymer latex is obtained by polymerizing a monomer composition M, comprising at least one tert-butyl acrylate and/or tertbutyl methacrylate monomer, by radical emulsion polymerization.

Abstract: The present invention relates to an aqueous emulsion paint comprising a) 5% to 50% by weight of an aqueous polymer dispersion having a solids content in the range from 40% to 60% by weight, obtainable by the free-radical aqueous emulsion polymerization of a monomer mixture comprising ethylhexyl acrylate, butyl acrylate and one or more vinylaromatics, preferably styrene, b) 0.1% to 5% by weight of alkali metal alkylsiliconate and/or water-soluble silicate, c) 20% to 70% by weight of inorganic fillers, d) 0% to 30% by weight of at least one pigment, e) 0.1% to 10% by weight of customary auxiliaries, and f) water, based in each case on the total amount of the emulsion paint, the pH of the emulsion paint having a value in the range from 10 to 12, and also relates to the aqueous polymer dispersions, to a process for the preparation thereof and to the use thereof as organic binders in emulsion paints having a high pH.