Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1997-03-10
1998-07-07
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106503, 81275, 812751, 81276, 8405, 8425, 424 59, 424 60, 424 61, 424701, 424 7083, 424401, F08K 500
Patent
active
057762414
ABSTRACT:
Process for the preparation of a melanic pigment of small particle size and its use in cosmetics. The subject of the present invention is a process for the preparation of a melanic pigment of very small particle size in which 100% of the particles have a particle size smaller than 1.mu.m, consisting in dissolving a melanin of natural and/or synthetic origin in an aqueous medium containing at least one alkalifying agent and/or at least one sequestering agent, and in precipitating the melanin thus dissolved by addition of at least one alkaline-earth metal salt. Another subject of the invention is the use of this pigment in compositions for cosmetic treatments and for dyeing hair.
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Koch et al., "Manufacture of color-stable C.I. Disperse Yellow 23", Chemical Abstracts, vol. 109, No. 4, Jul. 1988, Abstract No. 24238d; and DD-A-251 358.
Hirokazu, "Method for purifying melanin", Patent Abstracts of Japan, vol. 16, No. 485 (C-993) (5528), Oct. 1992 and JP-A-04-175-377.
Derwent Abstract 90-22600/30 (EP 379409) Grollier et al., Jul. 25, 1990.
Colette Annick
Giacomoni Paolo
Marrot Laurent
Mellul Myriam
"L'Oreal"
Bell Mark L.
Hertzog Scott L.
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