AQUEOUS POLYMER DISPERSION, USE THEREOF AND A METHOD OF PRODUCING AN AQUEOUS POLYMER DISPERSION Russian patent published in 2020 - IPC C08F2/20 C08F212/08 C08F212/14 C08F220/18 C08F251/00 D21H19/58 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to use of an aqueous polymer dispersion as a water retention modifier in a coloring coating. Aqueous dispersion is characterized by a viscosity value of 1–150 mPa·s with content of 40 wt % of solid substances and contains polymer particles with particle size D50 in range of 45–85 nm. Dispersion is obtained by free-radical emulsion copolymerisation of at least monomer (a) and monomer (b), where monomer (a) is at least one optionally substituted styrene, and monomer (b) is at least one C1-C4 alkyl (meth) acrylate, in a reaction mixture containing split starch, which has average molecular weight Mn 100–990 g/mol.

EFFECT: technical result is providing static retention of water coloring coating without increasing viscosity of coloring coating.

16 cl, 2 tbl, 3 ex