METHOD OF PRODUCING THE PLASTICIZED POLYVINYL ACETATE DISPERSION Russian patent published in 1997 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to producing the dispersion plasticized with dibutylphthalate and by polymerization in the presence of the protective polymeric colloid, emulsifier, plasticizer and water-soluble radical initiating agent. Emulsifier: bis-(alkylpolyhydroxyethylene)-phosphate (Oxyphos KD-6); protective colloid: styrene sodium salt with maleic anhydride where 0.48-0.52 carboxy-group equivalent is neutralized with sodium hydroxide at mass ratio of protective colloid : emulsifier = (2:1)-(1:4) at the following amounts of components, (mas. p. p. as measured for 100 mas. p. p. vinyl acetate): dibutylphthalate 5-15; potassium persulfate 0.5; total amount of emulsifier and protective colloid 5-15, and water - the measured amount to obtain dispersion with dry matter concentration 54%, not less. EFFECT: improved method of producing. 1 tbl