| 摘要 |
PURPOSE:To dispense with a process removing residual formalin by forming a capsule wall composed of an amino-aldehyde resin around the oil droplet in an emulsified dispersion by the condensation reaction of a specific compound. CONSTITUTION:An oily liquid containing a color image forming substance and a polymerizable compound is emulsified and dispersed in an aqueous medium to prepare an emulsified dispersion and a capsule wall composed of an amino-aldehyde resin is formed around the oil droplet in the emulsified dispersion by the condensing reaction of a compound represented by a formula I (wherein X1 and Y1 are a group selected from -NH2 or the like and Z is a group selected from -NH2, an alkyl group or the like and/or a formula II (wherein X2 and Y2 are a group selected from -NH2 or the like). By this method, a capsule wall enhanced in the retentivity of a core substance and reduced in oxygen diffusibility can be formed without requiring formalin. Therefore, a process for removing residual formalin is unnecessary. |
