The Procter Gamble Company

Wella Aktiengesellschaft

Wella Gmbh

Hans-Jürgen Braun

Markus Speckbacher

Cécile Pasquier

Eugen Konrad

Herbert Mager

Eric Tinguely

Annik Marguet

Thomas Clausen

Otto Richard Göttel

Laurent Chassot

Gisela Umbricht

Jessica Chassot

Veronique Buclin

Anita Roulin

Franco Jose Rosato

Pascal Andre Semadeni

Emmanuel Morand

Véronique Buclin

Guido Sauter

Dark coloured azo dyes

The present invention relates to agents for coloring keratin fibers which comprise at least one cationic azodye of the general formula (I). 

Agents for coloring keratin fibers

Coloring agents for keratin fibers

The present invention relates to agents for coloring keratin fibers which comprise at least one zwitterionic azomethine dye of the general formula (I), (II), or (III) in which z is a heterocycle of the formula in which R8 is an alkyl sulfonate radical of the formula (XIII); 

Agents for coloring keratin fibers comprising zwitterionic azomethine dyes

The object of the present patent application are agents for the oxidative coloring of keratin fibers, particularly hair, based on a developer substance-coupler substance combination, characterized in that they contain at least one meta-aminophenol derivative of general formula (I) wherein

Oxidizing hair coloring agents containing m-aminophenol derivatives

Colorant for keratin fibers containing cationic indazoline thiazolazo dyes of the general formula (I). 

Colorants containing cationic indazoline thiazolazo dye

A process for the preparation of 4-hydroxyalkylamino-2-nitro-anisoles of the general formula (I) wherein m is 2 or 3;by reaction of a 4-halogeno-3-nitro-aniline of formula (II) with a chloroalkyl-chloroformate of formula (III), alkaline ring closure of the resulting carbamate and nucleophilic replacement of the halogeno atom by a methoxy group to form a derivative of formula (IV), and finally ring opening of the resulting cyclic carbamate by treatment with methanolic alkali metal hydroxide, followed by neutralization with inorganic or organic acids, wherein the complete reaction is executed in a non-aqueous medium; as well as process for the preparation of 2-amino-4-hydroxyalkylamino-anisoles of formula (V) 

Process for the preparation of 4-hydroxalkylamino-2-nitro-anisoles

The present invention relates to agents for coloring keratin fibers which comprise at least one zwitterionic azo dye of the general formula (I) where R1 is an alkylsulfonate radical of the formula (II), 

The objects of the present invention are novel cationic azo azine dyes of the generic formula (I), as well as colorants for keratin fibers that contain these compounds.

Cationic azo azine dyes and colorants that contain these compounds

The dye-containing mass contains or consists of a compound of formula I: ##STR1## wherein R represents a DL-, D- or L-aldopyranose or a DL-, D- or L-ketopyranose, and X and Y, independently of each other, each represent a hydrogen atom, a halogen atom, a hydroxy group or an alkoxy group with from 1 to 4 carbon atoms; and, if needed, a direct-dyeing dye compound. The ready-to-use hair dye composition according to the invention is obtained by mixing this dye-containing mass with a hydrolase enzyme, e.g. a .beta.-galactosidase. The method for dyeing hair includes applying this ready-to-use hair dye composition to the hair.

Dye-containing mass, composition containing it and method for dyeing

The present invention includes new 4-{4'-{bis-(.beta.-hydroxyethyl)amino}phenylazo}benzenesulfonic acid amides of formula (II) ##STR1## wherein Y is fluorine, chlorine or bromine. The invention also includes new hair dyeing compositions for dyeing hair including 0.01 to 5 percent by weight of the compound of formula II, 0.5 to 30 percent by weight of a surfactant and a solvent which can be water, ethanol, propanol, isopropanol, glycerin or 1,2-propylene glycol.

Substitute 4-{4'-{bis-(B-hydroxyethyl)amino{phenylazo{-benzenesulfonic

The composition for dyeing hair yellow contains 2-nitroaniline derivatives of the general formula I: ##STR1## in which, R.sup.1 and R.sup.2 represent, independent of one another, hydrogen an alkyl of 1 to 4 carbon atoms, a monohydroxyallkyl of 2 to 4 carbon atoms or a dihydroxyalkyl of 3 or 4 carbon atoms, provided that R.sup.1 and R.sup.2 do not simultaneously represent alkyl groups of 1 to 4 carbon atoms, and X denotes an alkyl, monohydroxyalkyl, perfluoroalkyl or halogen. Also disclosed are new 2-nitroanitrile derivatives of the general formula II: ##STR2## in which R.sup.a and R.sup.b denote, independent of one another, ethyl, a monohydroxylalkyl of 2 to 4 carbon atoms or a dihydroxyalkyl of 3 or 4 carbon atoms, when Z is methyl, Cl or Br; or when Z is CH.sub.2 OH or a perfluoroalkyl, R.sup.a denotes hydrogen, a monohydroxyalkyl of 2 to 4 carbon atoms or a dihydroxyalkyl of 3 or 4 carbon atoms, and R.sup.b represents 2-hydroxyethyl or 2,3-dihydroxypropyl.

Growing community of inventors

Ueberstorf, Switzerland

Hans-Jürgen Braun