Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1990-10-25
1993-06-08
Robinson, Douglas W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
435 41, 424 59, 424 63, C08G 6306
Patent
active
052180794
ABSTRACT:
A melanin that is soluble in an aqueous solution at a pH of at least 5 to 9 at a temperature of 0.degree. to 100.degree. C. The melanin is further characterized by being capable of being filtered through at least a 0.45 micron size filter. Still further, the melanin is characterized by having a molecular weight of greater than 10,000 kilodaltons. The melanin is useful for providing a naturally-appearing tan to mammalian skin and hair. Such melanin can be produced by combining dopachrome and 5,6-dihydroxyindole (or allowing dopachrome to spontaneously form 5,6-dihydroxyindole) and an appropriate enzyme or by combining 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid or by incubating 5,6-dihydroxyindole-2-carboxylic acid alone. The melanin is also useful for providing a sun-screen to mammalian skin and hair.
REFERENCES:
patent: 4515773 (1985-05-01), Herlihy
patent: 4968497 (1990-11-01), Wolfram et al.
Korner & Gettins BA 81(1):5362 (1985).
Korner & Pawelek BA 71(1):3755 (1981).
Orlow et al., Pigment Cell Research 5:113-121 (1992).
American Scientist, Mar.-Apr. 1982, vol. 70, No. 2.
Chem. J. (1974) 143, 207-217, "Isolation of Oligomers of 5,6-Dihydroxyindole-2-Carboxylic Acid From the Eye of the Catfish", pp. 207-217.
Biochemistry 1988, 27, 6156-6159, "Function of Dopachrome Oxidoreductase and Metal Ions in Dopachrome Conversion in the Eumelanin Pathway".
Biochemical et Biophysica Acta 925 (1987) 203-209, "Effect of Metal Ions on the Rearrangement of Dopachrome".
Orlow Seth J.
Pawelek John M.
Robinson Douglas W.
Witz Jean C.
Yale University
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