METHOD FOR TOPICAL PROTECTION AGAINST ATMOSPHERIC POLLUTANT MOLECULES AND/OR FREE RADICALS PRODUCED BY EXPOSURE TO ULTRAVIOLET RADIATION

摘要

Disclosed is a method for topical protection against atmospheric pollutant molecules and ultraviolet (UV) radiation, comprising the steps of: a) producing a polymer matrix which is both repellent and anti-adhesive to atmospheric pollutant molecules, by means of a first biocompatible polymer (PB1); b) under the effect of the UV radiation, photocatalytically degrading the pollutant molecules having penetrated the polymer matrix by means of first semiconductor colloids (Col-1) onto which a second biocompatible polymer (PB2) has been grafted, which results in the formation of free radicals; c) neutralizing said free radicals by means of at least 2 antioxidants, which are: - a first antioxidant in the form of second semiconductor colloids (Col-2) onto which the first antioxidant (AntiOx-1) has been covalently grafted, said second grafted colloids (Col-2) auto-regenerating under the effect of the UV radiation, - and a second antioxidant agent (AntiOx-2) that is not present in the form of colloids grafted with an antioxidant; and d) stabilizing the polymer matrix by means of the second antioxidant agent (AntiOx-2).