| abstract |
The invention provides polymer powder compositions which are redispersible in water and are obtainable by means of free-radically initiated polymerization in an aqueous medium of one or more monomers from the group comprising vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides, and subsequent drying of the polymer dispersion obtained, characterized in that one or more silanes of the general formula (RO)3-nR1nSiR2X (1) are added before or during the polymerization or before the drying of the polymer dispersion, and their use in tile adhesives. |