| 摘要 |
PURPOSE: To obtain a cosmetic excellent in screening effects to ultraviolet radiations in comparison with the conventional products and capable of attaining a finish having a transparent feeling without white lifts, good in covering power on application and hardly developing a disorder in makeup with time. CONSTITUTION: This cosmetic comprises blending a rutile form titania-silica gel, preferably 30-80wt.% rutile form titania especially 40-60wt.% thereof. The rutile form titania-silica gel is obtained by mixing a silicon alkoxide with an organic titanium compound in a water miscible organic solvent, preferably heating with stirring the mixed solution under the reflux, then adding an aqueous inorganic acid solution to hydrolyze the mixture, and further maturing the resultant product under conditions at a temperature of <=60 deg.C, preferably <=40 deg.C, and at a relative humidity of >=60%, preferably >=70%. In the previously described process of mixing the raw materials, 0.01-5wt.% amount of the superfine particles of the rutile form titanium oxide (50-1000Åparticle diameters are preferable) based on the total mixed solution can preferably by dispersed.
|
