Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1998-05-21
2000-08-15
Liott, Caroline D.
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8407, 8408, 8411, 8412, 8414, 8416, 8421, A61K 713
Patent
active
061029742
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention describes a composition for dyeing keratinic fibers, particularly human hair, containing one monosubstituted p-phenylenediamine on a benzene ring, a substituted m-phenylenediamine and a 2-amino-6-chloro-4-nitrophenol derivative.
In the field of hair coloring, oxidation dye compositions have gained major importance. With them, the dyeing develops by way of a reaction of certain developer substances with certain coupler substances in the presence of an oxidant.
Oxidation dye compositions to be used to dye human hair must meet many requirements. The compositions must be toxicologically and dermatologically harmless as well as non-sensitizing and have to allow for the desired intensity in dye.
In addition, the hair dyes sought must have good light fastness, permanent wave fastness, and resistance to acid and abrasion. Even without the exposure to light, abrasion and chemical agents, the result of the dyeing should hold its color for at least four to six weeks. In addition, it is necessary, that through the use of appropriate developer and coupler components a broad spectrum of different color nuances can be achieved.
Another problem in practice is the different absorption of the dye compounds as a function of the nature of the hair, which results in uneven coloring of the hair. Normally, the dye compounds used tend to be absorbed more strongly by damaged parts of the hair than undamaged parts of the hair. For this reason, as a rule, the ends of the hair, which are more heavily damaged by typical aging processes and environmental factors (such as sunlight, hair washing, dyeing and permanent waving treatments), are dyed more intensively than the less- damaged shafts of the hair and the hairline, and the result is an unnatural, uneven and entirely unsatisfactory outcome of dyeing. This situation is particularly annoying with light shades.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to furnish an oxidative hair dye that enables uniform dyeing of the hair from the ends to the hairline within the natural range of shades, and at the same time that is only slightly mutagenic and sensitizing, if at all, and is highly biocompatible.
In European Patent Disclosure EP 0 665 005, the combination of a monosubstituted p-phenylenediamine benzene ring and a substituted m-phenylenediamine has been recommended for the dyeing of hair. This combination, however, provides unsatisfactory coloring results on unevenly damaged hair. In addition, the gradation of lighter shades in this case are more difficult to achieve.
Surprisingly it now has been found that the described disadvantages can be avoided, if the oxidative hair dye composition comprises a combination of oxidation dye precursors comprising group consisting of group consisting of general formula (I), ##STR2## in which R stands for hydrogen, a straight- or branched-chain alkyl group with 1 to 6 carbon atoms, a hydroxyalkyl group with 2 to 4 carbon atoms, or a straight- or branched-chain polyhydroxyalkyl group with 3 to 4 carbon atoms.
Preferred derivatives in accordance with general formula (I) are: 2-amino-6-chloro-4-nitrophenol, 6-chloro-2-ethylamino-4-nitrophenol and 6-chloro-2-((2'-hydroxyethyl)amino-4-nitrophenol.
The dye combination described makes even dyeing from the hairline to the ends of the hair possible, especially with lighter shades. The superior properties of the novel dye combination are exhibited especially in hair damaged by light and weather or in permanent-waved hair.
To round out the outcome of dyeing and to create special color effects, other oxidation dye precursors can be added to the hair dye, such as resorcinol, 4-chlororesorcinol, and derivatives of m-aminophenols, other p-phenylenediamine derivative compounds, and 1,3-benzenedioxol derivative compounds, as well as direct dyes, such as azo dyes, anthraquinones or nitrobenzene derivatives.
For the purpose of dyeing, the above-described combination of oxidation dye precursors in accordance with the invention and opti
REFERENCES:
patent: 5067966 (1991-11-01), Mager et al.
patent: 5518507 (1996-05-01), Audousset et al.
patent: 5849041 (1998-12-01), Kunz et al.
patent: 5863300 (1999-01-01), Audouset et al.
Liott Caroline D.
Striker Michael J.
Wella Aktiengesellschaft
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