| 摘要 |
PURPOSE:To prepare a microcapsule uniform in particle size distribution by a method wherein an oily solution and a aqueous solution are mixed at the time of the preparation of the microcapsule whose wall film is a polyurethane urea resin film and the solution mixture is passed through the gap between inner and outer cylinders rotating relatively to obtain an oil in water type emulsion and this emulsion is subjected to wall film forming treatment. CONSTITUTION:In the preparation of a microcapsule whose wall film is a polyurethane urea resin film, an oily solution and an aqueous solution are mixed to be passed through the gap between an inner cylinder 4 and an outer cylinder 3 rotating relatively to obtain an oil in water type emulsion which is, in turn, subjected to wall film forming treatment to obtain a microcapsule. As a result, the microcapsule uniform in particle size distribution can be prepared. |
