METHOD OF ISOLATION OF (CO)POLYMERS BY COAGULATION Russian patent published in 2000 - IPC

FIELD: chemistry of polymers. SUBSTANCE: described is method of isolation of (co)polymers by coagulation with steam prepared from butadiene and/or styrene. Said method comprises mixing (co)polymers with steam under pressure from 3 to 12 abs. bar and at temperatures from 120 to 200 C in contactor and feeding the mixture thus formed into coagulator operating at temperatures from 90 to 120 C and at pressure from 1.0 to 2.5 abs. bar. Stage (B) is carried out in the presence of polyvinyl alcohol as dispersant. EFFECT: elimination of formation of coarse polymeric particles. 5 cl, 2 ex