Oxidative dyeing compositions containing 4-hydroxy or 4-aminoben

Details Oxidative dyeing compositions containing 4-hydroxy or 4-aminoben Oxidative dyeing compositions containing 4-hydroxy or 4-aminoben

1993-11-19

1996-02-27

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8406, 8407, 8408, 8410, 8412, 8423, A61K 713

Patent

active

054944902

ABSTRACT:
Processes for the dyeing of keratinous fibers with compositions which contain 4-hydroxy- or 4-aminobenzimidazole or their derivatives corresponding to the formula (I): ##STR1## in which: R.sub.1 and R.sub.2 represent hydrogen or alkyl, one at least of the substituents being equal to hydrogen,
R.sub.3 denotes OH or NH.sub.2,
as coupler for dyeing keratinous fibers, in particular hair, in the presence of a p-phenylenediamine, the ratio between the p-phenylenediamine and the coupler of formula (I) being greater than or equal to 1.2.

REFERENCES:
patent: 3658455 (1972-04-01), Kalopissis et al.
patent: 5137538 (1992-08-01), Mandrange et al.
patent: 5203875 (1993-04-01), Tuloup et al.

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