METHOD OF PROTECTING SKIN FROM UV RADIATION USING A DERMATOLOGICAL COMPOSITION HAVING POROUS SILICON

摘要

Claimed are dermatological methods of skin treatment by topically applying compositions containing porous silicon, polycrystalline silicon and porous silicon oxide mirrors for sun protection applications. According to the applicant, cosmetic sunscreen preparations often include chemical compounds that are capable of absorbing certain wavelengths of UV radiation. Although effective, UV absorbing chemicals may cause sensitisation in some users. Many also incorporate a particulate component having diameters of 10nm—150nm whose purpose is to reflect or scatter certain wavelengths of UV radiation while remaining optically transparent on the skin. The small particles used are typically of a metal oxide, with titanium and zinc oxides being particularly common.