Ultrafine inorganic powder containing melanin pigments, process

Details Ultrafine inorganic powder containing melanin pigments, process Ultrafine inorganic powder containing melanin pigments, process

1988-07-18

1990-10-09

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

8409, 424 69, A61K 713, A61K 7035

Patent

active

049617540

ABSTRACT:
Powder consisting of inert inorganic particles having a particle size of less than 20 microns, containing on their surface a melanin pigment resulting from the oxidation of at least one indole dye of formula: ##STR1## in which: R.sub.1 is hydrogen, alkyl or --SiR.sub.9 R.sub.10 R.sub.11 ;

REFERENCES:
patent: 3194734 (1965-07-01), Seemuller et al.
patent: 4776857 (1988-10-01), Carroll et al.
patent: 4857308 (1989-08-01), Fukasawa

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