| abstract |
Cement-based compositions containing 1 to 500 parts by weight, based on 100 parts by weight of cement, of an emulsion polymer, synthesized from a) 30-99.5% by weight of at least one ester alkyl of (meth) acrylic acid, b) 0-70% by weight of at least one aromatic vinyl compound, c) 0.5-10% by weight of at least one alkyl polyethoxy (meth) acrylate of formula I in the R1 represents an atom of H or a methyl group, R2 a C1 to C4 alkyl group and n an integer from 1 to 55. d) 0-10% by weight of at least one ethylenically unsaturated mono or dicarboxylic acid, its anhydrides, amides or hydroxyalkylamides, e) 0-10% by weight of acrylonitrile or methacrylonitrile, and f) 0-50% by weight of ethylenically unsaturated compositions different from a) to e) additional, characterized in that ionic and / or non-ionic emulsifiers are used in emulsion polymerization. |