| 摘要 |
PURPOSE: To obtain porous aliphatic ester-amide copolymer resin microparticles easily without using any organic solvent toxic or highly polluting to the environment by removing the organic solvent and a metal salt from an organic solvent solution containing the metal salt and an aliphatic ester-amide copolymer resin. CONSTITUTION: This porous resin microparticles are obtained by mixing a resin solution prepared by dissolving or dispersing an aliphatic ester-amide copolymer resin in a solution prepared by dissolving a metal salt in an organic solvent containing or freed from water with water or an aqueous solution under agitation and removing the organic solvent and the metal salt from the mixture to deposit the aliphatic ester-amide copolymer resin. These microparticles are porous aliphatic ester-amide copolymer resin microparticles having a mean particle diameter of 0.5-50μm. According to this process, the aliphatic ester-amide copolymer resin can be deposited because at least a part or all of the organic solvent and the metal salt are eluted with the solvent and removed from the solution. In this operation, the spaces in the resin occupied by the organic solvent and the metal salt leave as pores to form porous aliphatic ester-amide copolymer resin microparticles. |
