| 摘要 |
PURPOSE:To prepare a microcapsule readily and safely in high yield, by a method wherein core substance comprising substance incapable of keeping a powdery form at about room temp. is ground under freezing at low temp. and the obtained powder is mixed with a fine powder having a particle size smaller than that of the obtained one under stirring at the above mentioned low temp. CONSTITUTION:Core substance (e.g., colored water) comprising substance incapable of keeping a powdery form because of liquefaction or agglomeration at about room temp. is ground under freezing at a low temp. not causing melting nor agglomeration of the powder to obtain a powder which is, in turn, mixed with a fine powder (e.g., a hydrophobic fine silica powder) having a particle size smaller than that of the obtained one under stirring at a temp. in the vicinity of the above mentioned low temp. and coated with said fine powder. By this method, encapsulation can be performed readily and safely in high yield and a microcapsule generation no deterioration nor modification in the above mentioned substances can be prepared. |
