Patent ID: 8586065

Claim:
A process for preparing an oil-in-water emulsified cosmetic composition, comprising: Mixing a first emulsion and a second emulsion: wherein: the first emulsion is obtained by mixing: (A) a sphingosine, (B) an acid compound, (C) a ceramide, and water, the sphingosine (A) and the acid compound (B) forming a salt of the sphingosine; this second emulsion is obtained by mixing: (D) an oil component, (E) a surfactant, and water; a molar ratio of the acid compound (B) to the sphingosine (A) ((B):(A)) is from 0.5 to 3; a weight ratio of the sphingosine (A) and the acid compound (B) to the ceramide (C) in the composition (((A)+(B)):(C)) is from 0.01 to 6; the sphingosine (A) is present in an amount of 0.01 to 1.5% by weight relative to a total weight of the composition; the acid compound (B) is present in an amount of 0.01 to 1.5% by weight relative to a total weight of the composition; the ceramide (C) is present in an amount of 0.1 to 10% by weight relative to a total weight of the composition; the oil component (D) is present in an amount of 0.01 to 20% by weight relative to a total weight of the composition; the surfactant (E) is present in an amount of 0.01 to 3% by weight relative to a total weight of the composition; the sphingosine (A) comprises at least one member selected from the group consisting of phytosphingosine, sphingosine, and a pseudo-type sphingosine according to the following formula the acid compound (B) comprises at least one member selected from the group consisting of phosphoric acid, succinic acid, citric acid, lactic acid, glutamic acid, and aspartic acid; the ceramide (C) comprises at least one member selected from the group consisting of ceramide 1, ceramide 2, ceramide 3, ceramide 5, ceramide 6II, and a pseudo-type ceramide represented by formula (6): where R 25 is a hexadecyl group, X 16 is a hydrogen atom, R 26 is a nonyl group, and R 27 is a hydroxyethyl group; the oil component (D) is selected from polar oils and hydrocarbon oils; and the first emulsion is free of surfactants other than a salt of the sphingosine (A).