Dark coloured azo dyes

Details Dark coloured azo dyes Dark coloured azo dyes

2011-07-12

2011-07-12

Wilson, James O (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

C546S209000, C548S191000

Reexamination Certificate

active

07977482

ABSTRACT:
The present invention relates toa) a non-oxidative coloring agent for keratin fibers, in particular human hair, comprising at least one dye according to formula (I) or (II),b) an oxidative coloring agent for keratin fibers, in particular human hair, which comprises at least one oxidizing agent (e.g. hydrogen peroxide), at least one oxidative dye precursor and at least one dye according to formula (I) or (II), andc) a lightening agent for keratin fibers, in particular human hair, which comprises at least one oxidizing agent (e.g. hydrogen peroxide) and at least one dye according to formula (I) or (II), with R4 being a cationic group.

REFERENCES:
patent: 102004051072 (2006-04-01), None
patent: 102004056403 (2006-05-01), None
patent: 0450438 (1991-10-01), None
patent: 07-076169 (1995-03-01), None
patent: WO-2005/117816 (2005-12-01), None
John Griffiths et al., “5-Acceptor-Substituted 4-Amino-2-Arylazothiazoles. A Unique Black Monoazo Chromophoric System,” Chem. Commun. pp. 1349-1350 (1998).
Kasali A. Bello, “Long Wavelength Absorbing Azo Dyes Derived from 2-Amino-4-Chloro-5-Formylthiazole as Diazo Component,” Dyes and Pigments, vol. 27(1), pp. 45-54 (1995).
Masaki Matsui et al., “Second-Order Optical Nonlinearity of Thiazolylazo Chromophores Containing Hydroxyl Groups,” Dyes and Pigments, vol. 37(4), pp. 283-289 (1998).

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