Process of manufacturing spherical polymeric beads

摘要: A process of manufacturing approximately spherical polymeric beads average size less than 20 microns, which comprises copolymerizing an unsaturated carboxylic acid and a crosslinking agent characterized in that the polymerization is initiated by means two part redox free radical system carried out reaction mixture comprising fine suspension droplets organic phase aqueous wherein chosen from group consisting methacrylic crotonic acid; agent; oil soluble water insoluble first system; water, at least 15% weight inert salt per volume phase, suspending second initiator partially both added to during course while maintained temperature range 0°C 50°C.