| 摘要 |
Aqueous copolymer dispersions, process for preparing them, and compositions comprising them for coatings The present invention provides aqueous copolymer dispersions obtainable by aqueous emulsion polymerization at least of monomers a) and b) and by subsequent addition of at least one cycloalkylepoxysilane to the resulting copolymer emulsion, monomer a) being an ester of alpha,beta-monoethylenically unsaturated carboxylic acids containing 3 to 6 carbon atoms and alkanols containing 1 to 18 carbon atoms and, if desired, a vinylaromatic compound, or a mixture of these monomers, and monomer b) being a monobasic or polybasic alpha,beta-monoethylenically unsaturated acid and/or anhydride thereof. The copolymer dispersions of the invention are suitable for producing coatings which are distinguished by increased tensile stress after the coating has been stretched.
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