| abstract |
A (meth) acrylate copolymer dispersion containing a comonomic unit of hydroxyalkyl (meth) acrylate, which is obtained from polymerization of monomers comprising or consisting, based on the weight of total monomer, (a) from 25 to 45 % by weight of at least one aromatic monovinyl and / or methyl methacrylate monomer; (b) from 50 to 70% by weight of at least one C₄₋₈ alkyl (meth) acrylate; (c) from 2 to 7% by weight of at least one (meth) hydroxyalkyl acrylate; (d) 0 to 1% by weight of at least one C₃₋₆ a monocarboxylic or dicarboxylic acid, b-monoethylenically unsaturated; and (e) from 0 to 0.65% by weight of (meth) acrylamide, (meth) acrylamide of N-hydroxyalkyl, and / or 2-acrylamido-2-methylpropanesulfonic acid and its use for flexible cementitious waterproofing materials. Also to the (meth) acrylate copolymer powder containing a comonomic unit of (meth) hydroxyalkyl acrylate obtained by drying the dispersion and its use for flexible cementitious waterproofing materials. |