A microcapsule (or microencapsulated product) having a uniform and smooth coating film and also an excellent performance of gradually liberating the content material is produced at a good particle size distribution while suppressing the occurrence of isolated or aggregated film material, aggregated microcapsules and isolated core material. The production process includes: a first coating step of mixing a water-soluble cationic amino resin and an anionic surfactant in the presence of a hydrophobic core material dispersed in an aqueous medium to coat the dispersed core material with a coacervate of the cationic amino resin and the anionic surfactant; and a second coating step of adding an amino resin prepolymer into an aqueous dispersion liquid containing the coated dispersed core material and polycondensating the amino resin prepolymer to further coat the coated dispersed core material with a polycondensate of the amino resin prepolymer.
一种具有均匀且光滑涂层膜的微胶囊(或微囊化产品),同时具有逐渐释放内容物的出色性能,可以在抑制孤立或聚集膜材料、聚集微胶囊和孤立核心材料的发生的同时,以良好的粒度分布生产。生产过程包括:第一涂层步骤,在
水相分散的疏
水性核心材料中混合
水溶性阳离子
氨基
树脂和阴离子表面活性剂,以涂覆分散的核心材料与阳离子
氨基
树脂和阴离子表面活性剂的凝聚物;第二涂层步骤,在含有涂覆的分散核心材料的
水相分散液中加入
氨基
树脂预聚物,并进行
氨基
树脂预聚物的聚缩反应,以进一步涂覆涂覆的分散核心材料与
氨基
树脂预聚物的聚缩物。