Water-based cosmetic and manufacturing method thereof

Abstract

A water-based cosmetic that includes: (A) ceramidic compound-containing particles that include a ceramidic compound and that are dispersed as an oil phase in an aqueous phase; (B) a fatty acid component composed of at least one selected from the group consisting of fatty acids and fatty acid salts; and (C) a polyhydric alcohol component that includes a first polyhydric alcohol having an IOB of 2.2 or more and a total content in the composition of from 3% by mass to 20% by mass, and a second polyhydric alcohol having an IOB of 2.0 or less and a total content in the composition of 0% by mass or not more than 3% by mass, wherein a total content of surfactant in the composition is 0% by mass or not more than 1% by mass, and a total mass of ceramidic compound in the composition is at least 3.0 times a total mass of the fatty acid component in the composition.

1 . A water-based cosmetic comprising:
 (A) ceramidic compound-containing particles that include a ceramidic compound and that are dispersed as an oil phase in an aqueous phase;   (B) a fatty acid component composed of at least one selected from the group consisting of fatty acids and fatty acid salts; and   (C) a polyhydric alcohol component that includes a first polyhydric alcohol having an IOB of 2.2 or more and a total content in the water-based cosmetic of from 3% by mass to 20% by mass, and a second polyhydric alcohol having an IOB of 2.0 or less and a total content in the water-based cosmetic of 0% by mass or not more than 3% by mass,   wherein a total content of surfactant in the water-based cosmetic is 0% by mass or not more than 1% by mass, and a total mass of the ceramidic compound in the water-based cosmetic is at least 3.0 times a total mass of the fatty acid component.   
     
     
         2 . The water-based cosmetic according to  claim 1 , wherein the first polyhydric alcohol is glycerin, 1,3-butylene glycol or a combination thereof. 
     
     
         3 . The water-based cosmetic according to  claim 1 , wherein the fatty acid component is at least one selected from the group consisting of fatty acids having from 10 to 30 carbon atoms and fatty acid salts having from 10 to 30 carbon atoms. 
     
     
         4 . The water-based cosmetic according to  claim 1 , wherein the fatty acid component is at least one selected from the group consisting of lauric acid, isostearic acid, oleic acid, γ-linolenic acid, α-linolenic acid and salts thereof. 
     
     
         5 . The water-based cosmetic according to  claim 1 , wherein the volume average particle diameter of the ceramidic compound-containing particles is 500 nm or less. 
     
     
         6 . The water-based cosmetic according to  claim 1 , wherein the surfactant is a nonionic surfactant. 
     
     
         7 . The water-based cosmetic according to  claim 1 , wherein the IOB of the second polyhydric alcohol contained in the water-based cosmetic is from 1.0 to 2.0. 
     
     
         8 . The water-based cosmetic according to  claim 1 , wherein a content of the second polyhydric alcohol is not more than 80% by mass of a total content of the first polyhydric alcohol. 
     
     
         9 . A method of producing the water-based cosmetic of  claim 1 , comprising:
 mixing an oil phase component that includes at least a ceramidic compound, and an aqueous phase component, at a temperature of 40° C. or lower, to obtain a ceramide dispersion that includes a polyhydric alcohol component in the aqueous phase component; and   mixing the ceramide dispersion and an aqueous composition.   
     
     
         10 . The method of producing the water-based cosmetic according to  claim 9 , wherein the polyhydric alcohol component is added as one component in the aqueous phase component when the oil phase component and the aqueous phase component are mixed, or the polyhydric alcohol component is added to a ceramide dispersion liquid obtained after the mixing. 
     
     
         11 . The method of producing the water-based cosmetic according to  claim 9 , further comprising dissolving the ceramidic compound in a good solvent for ceramides. 
     
     
         12 . The method of producing the water-based cosmetic according to  claim 9 , wherein the oil phase component and the aqueous phase component are each independently passed through a microchannel of which a cross-sectional area of a narrowest part thereof is from 1 μm 2  to 1 mm 2 , and are thereafter combined and mixed with each other. 
     
     
         13 . The water-based cosmetic according to  claim 1 , wherein the ceramidic compound comprises two or more natural ceramides. 
     
     
         14 . The method of producing the water-based cosmetic according to  claim 9 , wherein the ceramidic compound comprises two or more natural ceramides.