Material comprising an organic UV-A filter and method for displacing the maximum absorption wavelength as well as a cosmetic and/or dermatological preparations containing such material

摘要

The invention concerns a substance obtainable by sol-gel process, having a maximum absorption wavelength ( lambda max) in the interval ranging between 370 and 400 nm, said substance comprising at least an organic UV-A sunscreen filter having a lambda max less than 370 nm, at least a metal alkoxide selected among zirconium, titanium and aluminium alkoxides, at least a functionalised organic polymer or a precursor of such a polymer, or at least a functionalised silicon-coated polymer or a precursor of such a polymer, at least a solvent and an amount of water sufficient for partial and/or total hydrolysis of the metal alkoxide and its condensation. The invention also concerns a method for displacing in the interval ranging from 370 to 400 nm, the maximum absorption wavelength of the organic UV-A sunscreen filter having a lambda max less than 370 nm, and a cosmetic and/or dermatological composition for solar protection of the skin and/or other keratinous materials comprising the inventive substance.