| 摘要 |
PURPOSE:An ultraviolet ray absorber preventing effectively ultraviolet rays in the whole wave length, protecting the skin from sunburn, having stability to light rays and heat with day, containing a specific dibenzoylmethane and a hydrous oxide of a polyvalent metal. CONSTITUTION:The aimed substance containing (A) a dibenzoylmethane derivative (e.g., sodium 3'-hydroxy-4'-methoxybenzoylmethane-2-carboxylate, etc.) shown by the formula I (X is H, monovalent metallic cation, organic cation, 1-24C aliphatic hydrocarbon, or 2-3C polyoxyalkylene oxide; nY and mZ are OH, 1-24C aliphatic hydrocarbon, 1-24C alkoxy, or 2-3C polyoxyalkylene oxide; m and n are 0-3), and (B) a hydrous oxide of a polyvalent metallic element [e.g., alpha-alumina-hydrate(Al2O3-H2O), etc.]. The component A, for example, is obtained by condensing a monoester shown by the formula II (R is methyl, or ethyl) with a substituted acetophenone shown by the formula III. |
