METHOD FOR PREPARING POLYMERIC MONODISPERSED PARTICLES BY SUSPENSION POLYMERIZATION AND UNIT FOR ITS REALIZATION Russian patent published in 2008 - IPC C08F2/18 C08F2/01 C08F2/20 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to technology for producing granules used in preparing ion-exchange resins. Invention describes a method for producing polymeric monodispersed particles by suspension polymerization and involves the following steps: preparing monodispersed drops by adding a drop-forming device for preparing an aqueous dispersion medium into a chamber that formed the continuous phase, ejection of monomer hydrophobic liquid to aqueous dispersion medium through draw plate holes up under effect of regular vibration to form monomer liquid drops of a equal size preferably in aqueous dispersion medium; carrying out preliminary polymerization by adding prepared monomer liquid drops in aqueous dispersion medium into the first reactor, carrying out the polymerization reaction in a quasi-liquid layer to prepared suspension of partially polymerized drops of monomer in aqueous dispersion medium to degree when drops can't fuse or break; carrying out the final suspension polymerization at intensive stirring in the second reactor; at step for preparing monodispersed drops an aqueous dispersion medium is added to the form-forming device chamber at temperature 60-90°C, and monomer hydrophobic liquid is added into the drop-forming device at temperature 5-25°C or at environment temperature. Invention provides expanding zone for monodispersing drops of hydrophobic monomeric liquid in the drop-forming device allowing to vary sizes of prepared monodrops, and technical and technological simplifying the unit device.

EFFECT: improved producing method.

13 cl, 7 dwg, 1 ex