Copolymer dispersion for water whitening resistant coatings

摘要

The present invention provides an aqueous copolymer dispersion comprising a copolymer and a polyamine, the copolymer comprises, as copolymerized units, at least one nonionic monomer selected from (meth)acrylate C6-C22 alkyl ester or Versatic vinyl ester; wherein the amount of the nonionic monomer ranges from 15% to less than 50% and wherein the amount of the polyamine ranges from 0.1 to 2%, by dry weight percentage based on the dry weight of the copolymer. The copolymer dispersion is suitable for use in coating compositions such as stone paints with significant improvement of water whitening resistance.

主权项

1. An aqueous copolymer dispersion comprising a copolymer and a polyamine, the copolymer comprising, as copolymerized units, at least one nonionic monomer selected from C6-C22 alkyl esters of (meth)acrylic acid and vinyl esters of C9-C11 tertiary-alkanoic acids; and
0.05 to 3 wt % of a monomer having at lease one alkoxysilane functionality; wherein the amount of the nonionic monomer ranges from 15 wt % to less than 50 wt % and wherein the amount of the polyamine ranges from 0.1 to 2 wt %, by dry weight percentage based on the total dry weight of the copolymer dispersion; and wherein all monomer percentage are based on the dry weight of the copolymer.