Patent ID: 11931434
Assignee: KAO CORPORATION
Field: Pharmaceuticals (Chemistry)
Classification: CPC A | IPC A

Claim 4:
5. A method for producing an oil-in-water type sunscreen cosmetic, the method comprising:
emulsifying an oil phase containing an oil soluble ultraviolet ray absorbent (a1) in an aqueous medium with an emulsifier, so as to provide an emulsion containing emulsion particles (A) having an average particle diameter of more than 6 μm and 300 μm or less,
mixing an ionic surfactant (b1), a hydrophobic amphiphilic substance (b2), an oil soluble ultraviolet ray absorbent (b3), and an aqueous medium under heating for emulsifying, and then cooling at a cooling rate of 0.5° C./sec or more and 10° C./sec or less, so as to provide an emulsion containing particles (B) containing the component (b3) encompassed by the components (b1) and (b2), having an average particle diameter of 6 μm or less, and
mixing the emulsion containing the emulsion particles (A) and the emulsion containing the particles (B).