| abstract |
The present invention relates to a method for producing a thin-film nanostructure composed of a polymeric amphiphilic blend with a high concentration of the organic core for use against ultraviolet radiation, belonging to the field of cosmetics and pharmaceutical preparations of active substances characterised by special physical forms, involving three phases: an organic phase, an aqueous phase and an aqueous dilution phase, wherein in the organic phase an organic solvent such as ketones, esters and alcohols is used, or a combination of two or more of these substances, wherein the hydrophobic polymer, the organic chemical agents against U.V. radiation, the hydrophilic copolymer and a non-ionic surfactant are added individually; the aqueous phase is prepared with distilled water and a surfactant such as lauryl ether sodium sulphate or cocoamidopropyl betaine or coconut fatty acid diethanolamide or sorbitan laurate 80 EO, or cetyl phosphate; and the dilution phase is prepared with distilled water and surfactants, such as lauryl ether sodium sulphate or cocoamidopropyl betaine or coconut fatty acid diethanolamide or sorbitan laurate 80 EO. |