METHOD OF PRODUCING PROTECTIVE COLLOID-STABILISED POLYMERS Russian patent published in 2013 - IPC C08F2/22 C08F2/01 C08F210/02 C08F218/04 C08F218/08 B01F5/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing aqueous dispersions or powders which are re-dispersible in water. The method of producing protective colloid-stabilised polymers is realised by emulsion polymerisation of one or more vinyl esters of straight or branched alkylcarboxylic acids containing 1-15 carbon atoms with ethylene in a reactor with an external cooling loop, which is equipped with a pump and a heat exchanger, wherein the reaction mixture in the reactor is fed by a pump into a cooled static mixer-heat exchanger with fixed built-in components, and then returned to the reactor. The static mixer-heat exchanger has such parameters where its cooling rate is not less than 50 kW/m³ of reactor volume. Polymer powder which is re-dispersible in water can be obtained and dried.

EFFECT: no significant deposits on the walls of the heat exchanger are observed, efficient heat removal without deterioration of properties of the product.

5 cl, 1 dwg, 2 ex