METHOD OF OBTAINING POLYSTYRENE NANOPARTICLES USING SUPERCRITICAL ANTI-SOLVENT Russian patent published in 2010 - IPC C08F12/08 B82B3/00 C08F6/06 

FIELD: chemistry.

SUBSTANCE: method of obtaining polystyrene nanoparticles using a supercritical anti-solvent involves preparation of a solution, heating, compression, passing through a nozzle, mixing with a supercritical anti-solvent, precipitation of polystyrene particles and their collection. The method is characterised by using CO₂ as the supercritical anti-solvent. Polystyrene particles are collected in a liquid trap in form of water. The process of mixing with supercritical anti-solvent is carried out at P=(1.1-3)P_cr and temperature T=(1-1.1)T_cr, where T_cr is critical temperature of the anti-solvent used and P_cr is critical pressure of the anti-solvent used.

EFFECT: obtaining polystyrene nanoparticles with simultaneous reduction of power consumption owing to optimum parameters of the method.

1 cl, 1 dwg, 1 tbl, 6 ex