Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1985-06-14
1987-05-26
Meyers, Albert T.
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8410, 8415, 8425, 8428, 8435, A61K 713
Patent
active
046682368
ABSTRACT:
The invention relates to a dyeing composition for keratinous fibres containing, in a suitable vehicle, at least one nitrated direct dye of the 2-nitro-paraphenylenediamine series, in which the amino group in position 4 is mono- or disubstituted with lower alkyl or hydroxyalkyl radicals and in which the amino group in position 1 is optionally monosubstituted with a lower alkyl or hydroxyalkyl radial, and the aromatic ring can be substituted or unsubstituted on the remaining positions; the invention consists in introducing into such a composition an imidazolidinedione or one of its substitution derivatives, to improve the solubility of the abovementioned nitrated direct dye by a co-solubilization phenomenon. The invention also relates to a process for dyeing keratinous fibres using such compositions.
REFERENCES:
patent: 3168442 (1965-02-01), Brunner et al.
patent: 4170229 (1979-10-01), Olson
Chemical Abstracts, 89: 168942v (1978).
Cotteret Jean
Grollier Jean-Francois
Rosenbaum Georges
"L'Oreal"
Kilcoyne John M.
Meyers Albert T.
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