Preparation of aqueous medium suitable for preparing microcapsules

摘要

A hydrophobic organic solvent containing a compound of the formula (II) is dispersed and emulsified in an aqueous medium containing a sulfinic acid of the formula R5-SO2H (I) and serving as an aqueous medium for preparing microcapsules to react the compounds of the formulae (I) and (II) and synthesize a diarylmethane derivative of the formula (III) while encapsulating oily droplets of the resulting hydrophobic organic solvent solution of the diarylmethane derivative. Colorless chromogenic materials can be synthesized and encapsulated at the same time by this process.