| abstract |
Method for producing film-forming aqueous polyvinyl acetate dispersion internallynplasticized with dibutyl maleate, especially for drying emulsion paintsnair, consisting of semi-continuous emulsion polymerization, carried out at the temperature of 78 -n80 ° C, mixtures of vinyl acetate monomers in the amount of 50 - 90 wt. and dibutyl maleimatenin the amount of 10 - 50 wt.% in the presence of known non-ionic emulsifiers, protective colloids,na radical polymerization initiator and a buffer, characterized in that it is a buffer systemnthe basic calcium salt of amphoteric polyestrolyte from the phosphoprotein group is usednin the amount of 0.05 - 0.3 wt.% and sodium acetate in an amount of 0.1-0.4 wt.%. with respect to the sum of monoggnvinyl acetate and dibutyl maleate units, the ratio of the basic calcium saltnThe amphoteric polyelectrolyte for soda acetate is 1: 3.0 - 4.0. |