EMULSION POLYMERIZATION PROCESS FOR PRODUCING VINYL DISPERSION RESINS

摘要

The present invention relates to a new and novel process of producing a vinyl resin latex by the emulsion polymerization technique comprising adding to the latex with thorough mixing an aqueous solution of an electrolyte, such as, for example, ammonium carbonate, and removing a part of the water by filtration or centrifuging, and the like; to produce friable aggregates of individual spheres of polymer particles. Thereafter, the friable aggregates of polymer particles are separated into individual spheres of polymer particles by simple light rubbing or crushing and dried. In many cases, the separation can be accomplished by simple mixing of the resin with plasticizer during the plastisol preparation. Thus the spray drying and the subsequent grinding steps are eliminated producing a superior product for plastisols.