Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1998-07-06
2000-10-31
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
8408, 424 62, 424 701, 424400, 424489, 424502, A61K 700, A61K 713, A61K 7135, A61K 706, A61K 900
Patent
active
061398535
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to solid hair colorants and to application mixtures prepared therefrom for coloring hair.
1. Field of the Invention
The use of plant dyes in hair colorants has been known for some time. Fairly recent developments in this field are disclosed, for example, in FR 1 583 606, in BE 900219, in GB 2,190,104 and in DE 38 29 102. DE-A1 42 33 874 relates to hair tinting formulations in granular form which contain plant dyes in combination with synthetic substantive dyes.
2. Disussion of Related Art
Unfortunately, these known colorants based on plant dyes have the disadvantage that their ability to cover grey hair is very often unsatisfactory.
On the other hand, coloring with so-called oxidation dyes is known to the expert. In this case, coloring is achieved by the penetration of oxidation dye precursors into the hair where they react either together or with other oxidation dye precursors in the presence of an oxidizing agent to form the actual dyes. Excellent durable colors, which also cover grey satisfactorily, are obtained in this way. In view of the oxidizing agents used, however, unwanted impairment of the hair structure or even hair damage can occur, particularly in the event of fairly frequent application.
Accordingly, the problem addressed by the present invention was to provide hair colorants with which grey could be safely covered in the coloring of hair without any adverse effect on the hair structure.
Description of the Invention
It has now surprisingly been found that the required coloring effect and covering of grey hair can be obtained without any adverse effect on the hair structure by colorants based on oxidation dye precursors providing the colorants also contain a substantive plant dye or the plant product henna neutral.
Accordingly, the present invention relates to solid hair colorants in powder or granular form containing at least one oxidation dye precursor, an oxidizing agent and typical cosmetic additives, characterized in that they contain at least one substantive plant dye or henna neutral.
Although the products according to the invention are particularly suitable for coloring hair, they may also be used in principle for other coloring applications, for example for coloring textile fibers or wool.
The hair colorants according to the invention are present in powder or granular form. They contain an oxidation dye precursor as a first compulsory component.
In one embodiment of the invention, the hair colorants according to the invention contain only one oxidation dye precursor of the primary intermediate type.
Examples of primary intermediates suitable for in accordance with the invention are primary aromatic or heteroaromatic amines containing another functional group in the p-position, such as for example p-phenylenediamine, p-toluylenediamine, p-aminophenol, 3-methyl-4-aminophenol, 2-(2-hydroxy-ethyl)-1,4-aminobenzene, 2,4,5,6-tetraaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,5-diaminopyridine and derivatives thereof. According to the invention, other compounds of the type mentioned additionally containing one or more functional groups, such as OH groups, NH.sub.2 groups, NHR groups or NRIR.sup.2 groups, where R, R.sup.1 and R.sup.2 independently of one another represent optionally substituted C.sub.1-4 alkyl groups, are also suitable.
However, the colorants according to the invention preferably also contain at least one secondary intermediate. According to the invention, colorants containing more than one primary intermediate and more than one secondary intermediate may also be preferred.
According to the invention, preferred secondary intermediates are .alpha.-naphthol, resorcinol, 4-chlororesorcinol, 2-methyl resorcinol, m-aminophenol, m-phenylenediamine, m-toluylenediamine, 1,5- and 1,7-dihydroxynaphthalene, 5-amino-2-rnethylphenol, 6-amino-2-methylphenol or derivatives of the compounds mentioned. These secondary intermediates may be used either on their own or in combination with other secondary intermediates of the type j
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Akram Mustafa
Rohweder Sandra
Schwartz Stephan
Wolff Wolfgang
Dodson Shelley A.
Grandmaison Real J.
Hans Schwarzkopf GmbH & Co. KG
J. Murphy Glenn E.
Jaeschke Wayne C.
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