METHOD FOR IMPROVING UV RADIATION STABILITY OF PHOTOSENSITIVE SUNSCREEN FILTERS

摘要

The invention concerns a method for improving the UV radiation stability of a photosensitve sunscreen filter, which consists in incorporating said filter in a substance produced by sol-gel process from at least a silicon alkoxide and at least a surfactant. The invention also concerns a photostable substance comprising in combination a sunscreen filter and a light stabilizing substance produced by sol-gel process containing at least a silicon alkoxide and at least a non-ionic surfactant, and a cosmetic and/or dermatological composition comprising in a cosmetically and/or dermatologically acceptable support, an efficient amount of a photostable substance. Said cosmetic and/or dermatological composition is particularly designed to protect the skin and/or keratinous materials, against ultraviolet radiation.