MULTISTAGE POLYMER DISPERSIONS, METHOD FOR PREPARATION AND USE THEREOF Russian patent published in 2016 - IPC C08F2/24 C08F20/38 C08F220/38 C08L33/14 C04B41/48 C09D133/14 

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous multi-step polymer dispersions obtained by radically initiated aqueous emulsion polymerisation. Provided an aqueous dispersion of multi-stage polymerisates containing a soft and solid phase, with ratio of soft phase to hard phase of 25-95 wt% to 75-5 wt%, glass transition temperature (T_g) of soft phase obtained in first stage is -30-0 °C, while T_g of hard phase obtained in the second step is 20-60 °C, and wherein dispersion containing units of at least one monomer of general formula (I), where n is a number from 0 to 2, R1, R2, R3 each independently represent hydrogen or methyl group, X is oxygen or NH and Y is hydrogen, an alkali metal or NH₄. Also provided are versions of application of dispersion, as well as mineral moulded articles and fibre-cement boards coated with said dispersion.

EFFECT: technical result is disclosed dispersion enables to obtain coatings with high weather resistance, resistance to adhesion and fading.

13 cl, 1 tbl, 5 ex