Color modified melanins and methods for their preparation and us

Details Color modified melanins and methods for their preparation and us Color modified melanins and methods for their preparation and us

1992-05-07

1993-02-23

Robinson, Douglas W.

Drug, bio-affecting and body treating compositions

Extract, body fluid, or cellular material of undetermined...

Tissue, other than lymphoid tissue

424 59, 424 62, 424 63, A61K 3536

Patent

active

051888440

ABSTRACT:
Color modified melanin compositions are produced by exposure of a natural or synthetic melanin starting material to a color modifying agent under controlled conditions. By treating the melanin starting materials for a preselected time period, melanin products having a desired final color may be obtained. The color modified melanin may be employed in a variety of cosmetic and other topically applied formulations. Prior to incorporation in such formulations, the color modified melanins will be cleaned to remove the color modifying agent and low molecular weight degradation products of the melanin.

REFERENCES:
patent: 4402700 (1983-09-01), Feinland et al.
patent: 4698374 (1987-10-01), Gallas
patent: 4806344 (1989-02-01), Gaski
patent: 4806360 (1989-02-01), Leong et al.
patent: 4855144 (1989-08-01), Leong et al.
Cosmetics Science & Technology, 2d ed, 1972, Wiley Interscience, N.Y., pp. 282-283.
Wolfram et al. (1970) J. Soc. Cosmet. Chem. 21:875-900.

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