METHOD FOR PRODUCING EMULSIFIED LIQUID

PROBLEM TO BE SOLVED: To provide a method for producing an emulsified liquid, by which the O/W emulsion type emulsified liquid such as hair rinse, softener, cream or lotion can be produced by a liquid crystal phase inversion emulsification method. SOLUTION: This method for producing the O/W type emulsion type emulsified liquid using an oil phase as a dispersoid, comprising adding a water phase to the oil phase to form a liquid crystal structure, and further adding and mixing a water phase to the liquid crystal structure to invert the phase, is characterized by preliminarily adding a water-soluble solvent in an amount of 5 to 45 wt.% based on the total amount of the oil phase to disperse a water-soluble polymer in the oil phase, and mixing in a stirring energy of 0.5 to 70 (kW/m3×minute) on the formation of the liquid crystal structure. This production method can inhibit the adsorption of water to the water-soluble polymer, even when the water-soluble polymer is dispersed in the oil phase to form the liquid crystals, and enables the production of the good emulsified liquid. In addition, because the water-soluble polymer is dispersed in the oil phase, a tank for dispersing the water-soluble polymer is not needed to be provided separately. COPYRIGHT: (C)2007,JPO&INPIT