Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1980-03-05
1983-08-02
Meyers, Albert T.
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8406, 8408, 8421, A61K 713
Patent
active
043963927
DESCRIPTION:
BRIEF SUMMARY
The object of the invention are agents for the oxidative coloring of hair, characterized by containing 6-amino-3-methylphenol as coloring component.
Coloring agents on the basis of oxidative colorants resulting from oxidative coupling of certain developing substances with certain coupling substances have obtained essential importance in the dyeing of hair. 2,5-in diamino toluene, p-amino phenol and 1,4 diamino benzene are used in particular as developing substances. Resorcin, 4-chlororesorcin, --naphtol, m-aminophenol and derivatives of m-phenylene diamine such as m-toluylene diamine and 2,4-diaminoanisole are considered as preferentially used coupling substances. Apart from these initial dyeing stages, importance as constituents of oxidative hair-coloring agents is furthermore to be given to colorants directly drawing onto the hair, particularly direct-drawing aromatic nitro colorants. Dyeing in yellow, orange, red and violet can be obtained with these direct-drawing colorants.
Colorants used in the dyeing of human hair must satisfy numerous demands. They must be unobjectionable as to toxicology and dermatology, and enable dyeing to the desired intensity. It is furthermore required that a wide range of different tints must be obtainable by the combination of suitable initial coloring stages and suitable direct colorants. Furthermore, the resulting coloring should, to a good degree, be fast to light and resistant to permanent wave treatment, acids, and rubbing. Such colorings must, at any rate, remain stable against the influence of light, rubbing, and chemical agents, for a period of at least 4-6 weeks.
Due to the multitude of requirements, the initial coloring stages and direct-drawing colorants as used at present cannot give full satisfaction.
Direct-drawing aromatic nitro colorants will furthermore produce irregularities in coloring when used on hair that has been damaged to different degrees. In many instances, a sufficiently intensive coloring of porous, chemically damaged, hair tips is thus not possible.
Application of o-aminophenol in oxidative hair dyeing agents is merely possible to a limited extent, due to the only slight coloring intensity achieved with this substance.
Contrary to the above, it has now been found that agents for the oxidative dyeing of hair, containing 6-amino-3-methylphenol and/or its salts with inorganic or organic acids, or containing, respectively, the phenolates formed by this phenol derivative with an alkaline solution will satisfy the aforenamed requirements to a very large degree.
The hair dyeing agents as per invention may contain the 6-amino-3-methylphenol and/or its salts or phenolates respectively, alone or also as a mixture with the developing and coupling substances usual in hair coloring. If a mixture is present, the 6-amino-3-methylphenol will be applied in a molar ratio below normal relative to these developing and coupling substances. In particular instances however, an equimolar ratio or a respective excess ratio may be found suitable.
The hair dyeing agents as per invention should contain 0.01 to 2.0 percent by weight, preferably 0.02 to 0.3 percent by weight of 6-amino-3-methylphenol.
As usual developing substances, that may be obtained in the dyeing agents as per invention, 1,4-diamino benzene 2,5-diamino toluene and p-aminophenol should be named in particular.
Among the usual coupling substances, .alpha.-naphtol, 3,4 diaminobenzoic acid, resorcin, 4-chlororesorcin, m-aminophenol, m-phenylenediamine, m-toluylene diamine, 2,4-diamine anisole, 2,4-diaminobenzyl alcohol and 3-amino-6-methylphenol or mixtures thereof may be taken into consideration as constituents of customary hair dyeing preparations.
To obtain certain coloring nuances, customary direct-drawing colorants for instance triphenylmethane colorants such as Diamond Fuchsin (C.I. 42 510) and Leather Ruby HF (C.I. 42 520), aromatic nitro colorants such as 2-nitro-1,4-diamino benzene, azo dyes such as Acid Brown 4 (C.I. 14 805) and Acid Blue 135 (C.I. 13 385), anthraquinone dyes such as Disperse Viole
REFERENCES:
Chemical Abstracts, p. 3605 of Dec. Index, vols. 11-20, vol. 15: 3498.sup.3, vol. 16: 1429.sup.1, vol. 19: 1413.sup.2.
Davidson, "Intermediates for Dyestuffs", published by Ernest Benn Limited, London, (1926), p. 85.
Konrad Eugen
Mager Herbert
Kilcoyne John M.
Meyers Albert T.
Striker Michael J.
Wella AG
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