PRODUCTION PROCESS OF PARTICULATE POLYMER

摘要

A process is disclosed for the production of a particulate polymer which contains fine particles in a small amount and has a narrow particle size distribution. According to the process, a coagulant is added to a polymer latex which has been obtained by emulsion polymerization, and they are mixed together to form a polymer slurry. An organic liquid, said organic liquid being almost insoluble in water and incapable of dissolving the polymer but capable of wetting the polymer, is added to the polymer slurry, and they are mixed together to granulate polymer particles contained in the polymer slurry. At least one of the mixing step of the polymer latex and the coagulant and the mixing step of the polymer slurry and the organic liquid is conducted in a co-rotating twin-screw kneader.