Organosilyl-Benzo-triazole derivatives, processes for their production and their use as UV protecting agents
申请人:ISDIN, S.A.
公开号:EP1894936A1
公开(公告)日:2008-03-05
The present invention refers to new benzotriazole derivatives, which for their physicochemical properties can be used as UV protection agents. In addition, they can be used to manufacture cosmetic, dermatological, veterinarian as well as pharmaceutical formulations, which protect the skin, lips, nails and hair against UV radiation.
Two new 2-(2´-hydroxyaryl)benzotriazole derivatives were synthesized and studied by photophysical and photochemical techniques in order to assess their ability to act as UV-filters. The absorption and emission properties of both compounds were determined in solvents of different polarity. In non polar solvent, a photoinduced excited state intramolecular proton transfer was established leading to efficient non radiative dissipation of UV-energy. In addition, the compounds considered were photostable under irradiation with simulated sunlight.