| abstract |
(meth)acrylate copolymer dispersion, (meth)acrylate copolymer powder, use of a dispersion or a powder, kit, and flexible cement waterproofing materials. The present invention relates to a (meth)acrylate copolymer dispersion containing a hydroxyalkyl (meth)acrylate comonomer unit, which is obtained from the polymerization of monomers comprising or consisting of, based on the total monomer weight, (a) from 25 to 45% by weight of at least one monovinyl aromatic monomer and/or methyl methacrylate; (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 hydroxyalkyl (meth)acrylate; (d) from 0 to 1% by weight of at least one α,ß-monoethylenically unsaturated c3-6 monocarboxylic or dicarboxylic acid; and (e) from 0 to 0.65% by weight of (meth)acrylamide, n-hydroxyalkyl (meth)acrylamide, and/or 2-acrylamido-2-methylpropane sulfonic acid, and use thereof for waterproofing materials flexible cement water. the present invention also relates to (meth)acrylate copolymer powder containing a hydroxyalkyl (meth)acrylate comonomer unit obtained by drying the dispersion, and using the same for waterproofing materials of flexible cement. |