| abstract |
An aqueous polymeric dispersion, said polymer comprises polymerized units emitted from the following monomers with related weight proportions based on 100 parts by weight of a) + b): a) 50 to 90% of a nonionic monoethylenically unsaturated monomer, b ) 10 to 50% of a vinyl aromatic or methyl methacrylate monomer, c) 1 to 5% of a hydroxy-containing (meth)acrylate, d) 0.1 to 3% of an acidic monomer selected from d1) a acid monomer selected from a monocarboxylic or dicarboxylic acid monomers and d2) an acid monomer selected from strong acid monomers based on phosphorus or sulfur and/or their salts, or from mixtures of d1) and d2), e) 0.001 to 0.5% of a chain transfer agent, and f) 0 to 1% of an internal crosslinker that carries at least two copolymerizable ethylenic unsaturations, said polymer has a Tg measured by DSC of -30 to 0 °C and a content gel from 0 to 60%, formed during polymerization. In addition, a specific process for the preparation of said dispersion, a coating composition comprising said dispersion, uses of said dispersion in the waterproofing of cementitious waterproofing coatings and the final waterproofing coating resulting therefrom were provided. (Automatic translation with Google Translate, without legal value) |