| 摘要 |
PURPOSE:To suppress dissolving of a diazonium salt into the water and to prevent texture fogging by incorporating acid anion in an aqueous medium when emulsion-dispersing a core substance dissolved with a diazonium salt into the aqueous medium. CONSTITUTION:When preparing a microcapsule containing a diazonium salt, acid anion is contained in an aqueous medium for emulsifying a core substance containing the diazonium salt where at least one type of anion is effectively selected from following anions as said acid anion: CnF2n+1COO<-> (n: integer of 3-9), CmF2m+1CO3<-> (m: integer of 2-8), (CLF2L+1SO2)2CH<-> (l: integer of 1-18), BF4<->, PF6<-> and a radical shown by the formula. When the same acid anion as that composing a diazonium salt to be contained in the microcapsule is employed, dissolving of diazonium salt into the water is suppressed more effec tively, thereby such anion is selected preferably. |
