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US 10,369,088 B2Granted
Photosensitizer based microspheres
AssigneeInternational Business Machines Corporation
InventorsScott B. King, Brandon M. Kobilka, Joseph Kuczynski, Jacob T. Porter, Jason T. Wertz
Life of this patent
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Abstract
An encapsulated sunscreen composition that includes a polymeric shell material having a substantially spherical geometry. The shell material is a polymeric composition that includes a photosensitizer chemically bound to the polymeric composition. The polymeric shell material has a minimum diameter of 100 nm.
Claims20
An encapsulated photosensitizer composition comprising:
- a shell material having a substantially spherical geometry, wherein the shell material comprises a polymeric composition comprising a photosensitizer chemically-bound to the polymeric composition.
A lotion comprising:
- an active ingredient comprising an encapsulated photosensitizer composition of a shell material having a substantially spherical geometry, wherein the shell material comprises a polymeric composition comprising a photosensitizer chemically bound to the polymeric composition;
- and
- a lotion liquid base containing the active ingredient mixed therein.
A method of forming a photosensitizer composition comprising:
- forming a polyhydroxylate of a photosensitizer selected from the group consisting of oxybenzone, avobenzone, octisalate, octocrylene, homosalate, octinoxate and combinations thereof;
- creating an aqueous solution including a polymeric wall forming material;
- mixing the aqueous solution including the polyhydroxylate of the photosensitizer with the aqueous solution in combination with a polymeric shell forming material provide an emulsion;
- and
- adding a core agent to the emulsion, wherein wall forming material encapsulates the core agent to provide a shell material having a substantially spherical geometry with a polymeric composition having a chemically bound photosensitizer provided by said polyhdroxylate.
2 more elements
Dependencies are inferred from the claim text.