PROCESS FOR PRODUCING FINE PARTICLES OF POLYPHENYLENE SULFIDE RESIN, FINE PARTICLES OF POLYPHENYLENE SULFIDE RESIN, AND DISPERSION THEREOF

摘要

This invention provides a process for producing fine PPS resin particles and a dispersion thereof by industrially applicable simple operation. This invention further provides very fine PPS resin particles, and furthermore provides fine PPS resin particles uniform in particle size. This invention is a process for producing fine polyphenylene sulfide resin particles comprising the following steps (a) and (b) :
(a) A step of heating a polyphenylene sulfide resin in an organic solvent, for obtaining a solution with the polyphenylene sulfide resin dissolved therein (dissolution step)
(b) A step of flush-cooling the aforementioned solution, for precipitating the fine particles of the polyphenylene sulfide resin (precipitation step).