| abstract |
PURPOSE:To obtain a cosmetic containing 4-hydroxy-3-ethoxycinnamic acid as an active ingredient, capable of preventing sun-burn by ultraviolet rays and having beautifying effect by inhibition of thyrodinase activity, effect for reducing stain, etc., and skin aging inhibiting effect. CONSTITUTION:The aimed cosmetic obtained by blending 4-hydroxy-3- ethoxycinnamic acid expressed by the formula (R is H, straight-chain, branched, cyclic or polycyclic alkyl, alkenyl, aryl, alkali metal, alkaline earth metal or quaternary amine) and/or derivative thereof as active ingredients. In the use of the cosmetic, the cosmetic is soluble in alcohol or polyhydric alcohol and applicable to broad agent type. The above-mentioned active ingredients are blended at a ratio in the range of >=0.01wt.%, especially preferably 0.5-10wt.% based on the total cosmetics. Further more arbitrary one or two or more kind selected from a group consisting of the above-mentioned active ingredient and derivative thereof can be used in the cosmetic. |