| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing polycarbonate paraticles, that are excellent in drying property, are high in bulk density and equal in grain size, and can be produced stably and continuously in a high productivity. SOLUTION: The method for producing the polycarbonate particles comprises preparing an oil in water-type (O/W) liquid-liquid dispersion by stirring and mixing an organic solvent solution of a polycarbonate resin with warm water, supplying the liquid-liquid dispersion by continuous flashing into a mixing granulation vessel filled with warm water while holding the liquid-liquid dispersion under a pressurized condition, removing the organic solvent to generate the polycarbonate particles, while taking out at least one part of the generated polycarbonate particles, and circulating the pulverized particles into the mixing granulation vessel after pulverizing the particles using a wet grinding mill. COPYRIGHT: (C)2010,JPO&INPIT |
