| abstract |
A composite particle comprising one or more core particles encapsulated within a polymeric shell, in which at least some of the core particles comprise a material capable of releasing oxygen free radicals, in which a first antioxidant capable of inactivating or neutralizing reactive oxygen species is co-encapsulated or co-trapped with the core particles within the polymeric shell, and in which a second antioxidant capable of preventing or reducing oxidative damage to the skin is coated on the polymeric shell, and attached to said polymeric shell by any of chemical or physical bonds, and wherein said polymeric shell is formed from a material selected from the group consisting of polyester, polyamide, polyphthalamide, polyimide, polycarbonate, polyketone, cellulose acetate, polysulfone, polyphenylene sulfide, polyphenylene oxides, polylactic acid, polyvinylpyrrolidone , polystyrene, polyacrylonitrile, polyacrylamide, polymethylmethacrylate, and polyacrylate. |