PURPOSE: To prevent an entrainment of coarse oil drops and to obtain an emulsion without causing application trouble, by adding an oil-phase solution directly into an aqueous solution which is agitated with a stirrer rotated at such a speed as not to generate splash of the liquid substantially.
CONSTITUTION: As a production of a oil-in-water type emulsion used for a photo-sensitive material, etc., a prescribed amount of prepared aqueous solution L1 is first supplied into a emulsifying tank 1 through a supply pipe 5. Next, a prepared oil-phase solution L2 is added directly into the aqueous solution L1 phase at a rate of 30-45l/min after starting rotation of a high-speed stirrer 1A. During this process, the high-speed stirrer 1A is rotated at such a low rotation speed as 500-3000rpm in order to avoid splash of the liquid. After the addition is finished, the rotation speed is increased gradually or stepwise from that during the addition so as to contrive a complete emulsification and dispersion, thereby obtaining an emulsion.
SUZUKI SHINICHI
KOYAMA SANAE
