Wella Aktiengesellschaft

Sylviane Oberson

Hans-Juergen Braun

Gisela Umbricht

Catherine Mueller

Laurent Chassot

Cécile Pasquier

Otto Goettel

Manuela Javet

Andre Hayoz

Laurence Descloux

Veronique Buclin-Charrière

4-(Pyrazol-4-ylimino)-2,5-cyclohexadienylidene-ammonium salts of the general formula(I) and colorants comprising these compounds for keratin fibres.

Cationic dyes and dyestuff for keratin fibres containing said compounds

The composition for dyeing fibers is obtained before use by mixing a first component A1, containing at least one enamine of the formula (I) with a second component A2, containing at least one carbonyl compound. A multi-component kit for dyeing and, later on, decolorizing fibers, and a method for temporarily dyeing hair with the composition for dyeing fibers and later removing the dyed hair color with a decolorizing component B containing a sulfite are also provided. The multi-component kit for dyeing and, later on, decolorizing fibers, separately contains the first component A1, the second component A2 and the decolorizing component B.

Multi-component kit and method for temporarily dyeing and later decolorizing hair

The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are: Dyeing agents for keratin fibers, containing the compounds of formula (I), and methods of dyeing hair with these dyeing agents are described.

7-nitro-2,1,3-benzoxadiazole and 7-nitro-2,1,3-benzthiadiazole derivatives, as well dyeing agents for keratin fibers containing these compounds

The objects of the present invention are an agent (A) for coloring fibers obtained by mixing two components (A1) and (A2), characterized in that component (A1) contains at least one 2-benzothiazolinone hydrazone derivative of formula (I) or a physiologically tolerated salt thereofand component (A2) contains at least one ortho-quinone of formula (II) or a para-quinone of formula (III),a method for coloring hair by use of said agent and a multicomponent kit for coloring hair.

Agent and method for coloring keratin fibers containing 2-benzothiazolinone-hydrazone and quinone derivatives

The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are:Dyeing agents for keratin fibers, containing the compounds of formula (I), and methods of dyeing hair with these dyeing agents are described.

The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are:Dyeing agents for keratin fibers containing these compounds and methods of dyeing hair with the dyeing agents are described.

7-Nitro-2,1,3-benzoxadiazole and 7-nitro-2,1,3-benzthiadiazole derivatives, as well dyeing agents for keratin fibers containing these compounds

7-Nitro-2,1,3-benzoxadiazole derivatives and 7-nitro,2,1,3-benzthiadiazole derivatives and dyes, which contain these compounds and which are used for dying keratin fibers

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Ecuvillens, Switzerland

Sylviane Oberson