| 摘要 |
PURPOSE:To decrease a liberated wall material and to prevent the exudation of a core material by using a core material and a coacervate drop having the electrification characteristics in a capsulation medium which are opposite from each other. CONSTITUTION:The electrification characteristics of a core material and a coacervate drop in a capsulation medium are made opposite from each other in a microcapsulation method by a phase sepn. method from an org. solvent system. For example, AC PE (available from allied chemical Co.) is used the core material, a copolymer of 95:5 polymn. ratio of styrene-dimethylaminoethyl methacrylate as a wall forming resin and dimethyl formamide and water are used as the capsulation medium. As a result, the liberated wall material is extremely decreased and the capsule free from the exudation of the core material is obtd. |
