METHOD FOR PRODUCING RESINOUS POWDER

摘要

PROBLEM TO BE SOLVED: To provide a resinous powder with low discoloration more easily than conventional methods including decoloring step, by lowering discoloration occurring at the production of smaller particle size of a resinous powder through pulverization of a resinous raw material of a larger particle size obtained by crushing or the like of a polymer at the time of producing a resinous powder having a particle size suitable for a filler material of a dental curable composition or the like comprising a spherical silica/zirconia-containing methacrylic resin or the like. SOLUTION: This resinous powder with low discoloration is obtained by wet-pulverization of a resinous raw material by a pulverizer such as a vibrating ball mill using water containing a surfactant such as sodium salt of dodecylbenzenesulfonic acid as a dispersant, filtering and drying. COPYRIGHT: (C)2003,JPO