| 摘要 |
PURPOSE:To efficiently sphere resin particles contg. epoxy resin by adding silica whose polarity is reverse to that of the resin particles to the resin particles, heating and stirring the silica added resin particles in a liq. not dissolving the constituent components of the resin particles. CONSTITUTION:Resins including epoxy resin as a resin binder are melted, kneaded and pulverized to obtain amorphous resin particles and silica whose polarity is reverse to that of the resin particles is added to the resin particles. The silica sticks electrostatically firmly to the resin particles. The silica added resin particles are then stirred and dispersed in a liq. not dissolving the constituent components of the resin particles. At this time, the resin particles are heated to the glass transition temp. of the epoxy resin or above. The resin particles can efficiently be sphered. |
