Patent ID: 8263050
Filing Date: 2012-09-11
Classification: A61K,A61Q

Abstract:
1. A photostabilized photoactive sunscreen or dermatological composition comprising a mixture of a photon-excited photoactive compound that degrades by the absorption of ultraviolet light and develops a singlet excited state, or fluoresces when subjected to UV radiation, and at least 0.1% of a compound of formula (I) that photostabilizes the photon-excited photoactive compound by accepting electronic singlet state energy from the photon-excited photoactive compound, thereby quenching the singlet excited state energy from the photon-excited photoactive compound to transfer the singlet excited state energy from the photon-excited photoactive compound to the compound of formula (I), thereby returning the photon-excited photoactive compound to its ground state so that the photoactive compound can absorb more photons from UV light, thereby photostabilizing said photoactive compound: wherein one of R 1 and R 2 is a straight or branched chain C 1 -C 30 alkoxy radical, and the non-alkoxy R 1 and R 2 is hydrogen; and R 3 is a straight or branched chain C 1 -C 30 alkyl radical.