| 摘要 |
PURPOSE: To obtain a skin cosmetic, containing ceramides or pseudoceramides having a specific structure, a dicarboxylic acid and a salt thereof, excellent in humectant ability, having a low irritant feeling and useful for the facial skin. CONSTITUTION: This skin cosmetic contains (A) ceramides or pseudoceramides of formula I or II (R<1> and R<2> are each a 9-39C straight-chain or branched chain saturated or unsaturated hydrocarbon group which may be substituted with one or more hydroxyl groups; R<3> and R<4> are each H, a phosphate residue, a sulfate residue or a saccharide residue), (B) a dicarboxylic acid of the formula HOOC-X-COOH (X is a 1-6C bivalent hydrocarbon group) (preferably malonic acid, succinic acid, fumaric acid, etc.) and (C) a salt of the dicarboxylic acid of the formula HOOC-X-COOH. Furthermore, 0.01-20wt.% ingredient (A) is preferably contained and the total amount of the contained ingredients (B) and (C) as acids is preferably 0.01-20wt.%. The blending molar ratio of the ingredient (B) to the salt of the ingredient (C) is preferably (1/9) to (9/1).
|
