Patent ID: 11964044
Assignee: AMOREPACIFIC CORPORATION
Field: Pharmaceuticals (Chemistry)
Classification: CPC A | IPC A

Claim 5:
6. A method for preparing the phase change cosmetic composition of claim 1, comprising the steps of:
preparing an oil phase containing a cetyl ester wax,
preparing an aqueous phase containing an inulin-based surfactant,
mixing the oil phase with the water phase so that a weight ratio between a weight of the oil phase and a weight of the water phase is about 1:1 to about 1:3 to prepare a mixture, and
subjecting the mixture to an emulsification at a pressure of about 500 to about 1500 bar,
wherein the inulin-based surfactant is inulin lauryl carbamate
wherein a content of the cetyl ester wax is 17 to 20% by weight based on the total weight of the composition, and a content of the inulin-based surfactant is 0.125 to 0.5% by weight based on the total weight of the composition,
wherein the composition is an oil-in-water formulation in which an inner phase is an oil phase and an external phase is an aqueous phase, and the cetyl ester wax is contained in the oil phase, and the inulin-based surfactant is contained in the aqueous phase, and
wherein the composition maintains a liquid state before being applied to a skin and rubbed, and changes to a solid state when applied to the skin and then rubbed.