Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1990-08-02
1991-10-29
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8406, 8414, 8415, 8416, 8421, 8425, 8428, 8429, 564442, A61K 713, C07C21100
Patent
active
050612891
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The subject matter of the invention is compositions for the oxidative dyeing of hair based on 3,4- or 4,5-diaminopyrazol derivatives as developer substances and new 3,4- or 4,5-diaminopyrazol derivatives.
In the area of hair coloring, oxidation dyestuffs have achieved considerable importance. The coloring is brought about by means of the reaction of certain developer substances with certain coupler substances in the presence of a suitable oxidizing agent.
In particular, 2,5-diaminotoluene, 2,5-diaminophenylethyl alcohol, p-aminophenol and 1,4-diaminobenzene are used as developer substances. Resorcin, 4-chlororesorcin, 1-naphthol, 3-aminophenol, 5-amino-2-methylphenol and derivatives of m-phenylenediamine are among those coupler substances whose use is preferred.
Numerous special demands are placed on oxidation dyestuffs which are used for dyeing human hair. For example, they must be unobjectionable in toxicological and dermatological respects and must enable the desired intensity of coloring. In addition, a favorable fastness to light, permanent waving, acids and rubbing are required of the achieved hair dyes. But, in every instance, such hair dyes must remain stable over a period of at least 4 to 6 weeks without being influenced by light, rubbing or chemical agents. Moreover, it is necessary that a wide assortment of various color shades can be produced by means of combining suitable developer and coupler substances. In order to achieve natural and especially fashionable shades in the red area, 4-aminophenol is chiefly used, by itself or in a mixture with other developer substances, in combination with suitable coupler substances.
The developer 4-aminophenol, which was chiefly used previously for the red area of the color scale, has recently been criticized for not being physiologically tolerated, while developer substances such as pyrimidine derivatives, which have been recommended more recently, are not completely satisfactory with respect to coloring. The pyrazol derivatives described in DE-OS 2 I60 3I7 such as 3-amino-1-phenyl-2-pyrazolone-5 only dye hair to depths of color which are unusable in hair dyeing practice.
SUMMARY OF THE INVENTION
Therefore, the problem arises of providing an oxidation hair dye composition based on a combination of developer substances and coupler substances containing a developer substance for the red area which is very favorably tolerated physiologically and, together with conventional coupler substances, dyes the hair in brilliant red color shades with a great depth of color.
It has now been found that the proposed problem is solved in an outstanding manner by means of a composition for the oxidative dyeing of hair based on a combination of developer substances and coupler substances containing, as developer substance, a diaminopyrazol of the general formula (I), ##STR2## wherein R.sup.1, R.sup.2 and R.sup.4 are identical or different and designate hydrogen, alkyl with 1 to 4 carbon atoms, hydroxyalkyl with 2 to 4 carbon atoms, benzyl or phenyl, and R.sup.3 is hydrogen, alkyl with 1 to 4 carbon atoms, hydroxyalkyl with 2 to 4 carbon atoms with the proviso that the amino groups are in 3,4 or 4,5 position, or its physiologically tolerated, water-soluble salt.
The developer substances of formula (I), of which the 3(5),4-diaminopyrazol, 4,5-diamino-1-methylpyrazole and the new 4,5-diamino-I-benzylpyrazol are preferred, are to be contained in the hair dye composition in a quantity of approximately 0.01 to 3.0 percent by weight, preferably 0.1 to 2.5 percent by weight.
Although the advantageous characteristics of the developer substances described here suggest the use of the latter as the only developers, it is also possible, of course, to use the developer substances of formula (I) together with known developer substances such as 1,4-diaminobenzene, 2,5-diaminotoluene or 2,5-diaminophenylethyl alcohol.
Of the known coupler substances, the following are preferably taken into consideration as component part of the hair dye composition described h
Clausen Thomas
Kern Ute
Neunhoeffer Hans
Lieberman Paul
Parks William S.
Striker Michael J.
Wella Aktiengesellschaft
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