Cosmetic and dermatological compositions
AssigneeNortheastern University
InventorsLeila Deravi, Camille A. Martin, Amrita Kumar
Life of this patent
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Abstract
Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. Each synthetic particle typically includes one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45; the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.
Claims34
A composition comprising a plurality of synthetic particles having a size in the micrometer or nanometer range, each synthetic particle including one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45;
- the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.
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A composition comprising aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof stabilized in a polyelectrolyte solution.
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A method for extracting phenoxazone and/or phenoxazine, comprising refluxing tissue containing ommochrome in a solvent.
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A method for synthesizing ommochromes comprising electrochemically oxidizing 3-hydroxykynurenine.
A composition comprising a (i) colorant having an aromatic group and/or a chemical group allowing interaction with a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and (ii) the pigment;
- the pigment stabilizing the colorant;
- and the composition being biodegradable and biocompatible.
A composition comprising a solid and transparent matrix and (i) a free pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and/or (ii) one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, the free pigment and/or the aggregates being homogenously distributed throughout the matrix;
- and the composition being biodegradable and biocompatible.
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Dependencies are inferred from the claim text.