Colored sunscreen compositions
AssigneeCosmetica, Inc.
InventorsDavid S. Soane, Toshiaki Hino
Life of this patent
Estimating the term…
Abstract
This invention is directed to sunscreen formulations that exhibit both UV absorption and skin coloring properties. More particularly, the colored sunscreen preparations of the invention comprise a colored nanostructure that is reactive to skin or capable of being immobilized onto the skin. The colored nanostructure comprises a particulate sunblock agent in intimate relationship with a coloring agent or a colored polymeric nanomatrix. These colored sunscreen compositions provide improved retention of sunblock and coloring agents on the skin.
Claims22
A colored sunscreen composition exhibiting both UV absorption and skin coloring properties, the colored sunscreen composition comprising a colored nanostructure, the colored nanostructure comprising a particulate sunblock agent in intimate relationship with a coloring agent or a colored polymeric nanomatrix and being reactive to skin or capable of being immobilized onto the skin.
A colored nanostructure comprising a particulate sunblock agent chemically attached to a coloring agent, and wherein the colored nanostructure is reactive to skin or capable of being immobilized onto the skin.
A colored nanostructure comprising a particulate sunblock agent in intimate relationship with a colored polymeric nanomatrix, wherein the colored polymeric nanomatrix comprises a coloring agent chemically attached to a polymeric nanomatrix, and wherein the colored nanostructure is reactive to skin or capable of being immobilized onto the skin.
A method of treating skin to provide improved retention of sunblock and coloring agents on the skin, the method comprising:
- applying a colored sunscreen composition to the skin under a first set of conditions, the colored sunscreen composition comprising a colored nanostructure, the colored nanostructure comprising a particulate sunblock agent in intimate relationship with a coloring agent or a colored polymeric nanomatrix and being reactive to skin or capable of being immobilized onto the skin;
- and
- changing the conditions to a second set of conditions such that the colored nanostructure is attached to or immobilized onto the skin.
Dependencies are inferred from the claim text.