ES396834A1 - Enzyme-activated oxidative process for colouring hair - Google Patents

Abstract

Procedure for the preparation of an oxidative composition, for hair dyeing, characterized in that it comprises dissolving in water (a) from approximately 0.01 ppm to 500 ppm of an oxidase enzyme selected from the group consisting of laccase, lactate oxidase, glucose oxidase, galactose oxidase, L-2-hydroxy-acid oxidase, aldehyde oxidase, monoamine oxidase and urate oxidase; (b) from about 0.001% to about 6% by weight of an aromatic compound which is a primary oxidation dye precursor, selected from the group consisting of where X is selected from the group consisting of hydrogen, halogen, nitro, amine, (see formula), -COOM, and -SO3M where M is hydrogen or an alkali or alkaline earth metal, ammonium or substituted ammonium where 1 or more hydrogens of the ammonium ion is replaced with an alkyl radical of 1 to 3 carbon atoms, Y is selected from the group consisting of hydrogen, halogen, nitro, hydroxyl, (see formula), -COOM', and -S03M', where M'is hydrogen or an alkali or alkaline earth metal where R1, R2, R3 and R4 are each selected from the group consisting of hydrogen, alkyl and alkenyl with 1 to 4 carbon and aryl atoms, aralkyl and alkaryl with 6 to 9 carbon atoms, R5 is selected from the group consisting of hydrogen, alkyl and alkenyl having from 1 to 4 carbon atoms and aryl, alkaryl and aralkyl groups having from 6 up to 9 carbon atoms, R6 is selected from the group consisting of hydrogen and alkyl and alkenyl having 1 to 4 carbon atoms, R7 is selected from the group consisting of hydrogen, alkyl and alkenyl with 1 to 4 carbon and aryl atoms, alkaryl, and aralkyl having from 6 to 9 carbon atoms; (c) from about 0% to 6% of an aromatic compound which is a secondary oxidation dye precursor selected from the group consisting of ** (See formula) ** where X is selected from the group consisting of hydrogen, halogen, nitro-amine, (see formula), -COOM, and -SO3M where M is hydrogen or an alkali or alkaline earth metal, ammonium or substituted ammonium where 1 or more hydrogens of the ammonium ion is replaced with an alkyl radical of 1 to 3 carbon atoms, Y is selected from the group consisting of hydrogen, halogen, nitro, hydroxyl, (see formula), -COOM'and SO3M', where M'is hydrogen or an alkali or alkaline earth metal, where R1, R2, R3, R4, R5, R7 and R8 are each selected from the group consisting of hydrogen, alkyl and alkenyl with 1 to 4 carbon atoms and aryl, aralkyl and alkaryl having 6 to 9 carbon atoms, R6 and R10 are each selected from the group consisting of hydrogen and alkyl and alkenyl having from 1 to 4 carbon atoms, Z'is selected from the group consisting of hydrogen, C1-C3-alkyl, halogen, nitro, O, -COOM' and -SO3N', where M' is hydrogen or an alkali or alkaline earth metal and Z is selected from the group consisting of hydrogen, alkyl with 1 to 3 carbon atoms, halogen, nitro, (see formula), -COOM and -SO3M, where M is hydrogen or an alkali or alkaline earth metal; the total concentration of said primary and secondary oxidation dye precursors being from 0.001% to 6% by weight, said solution being in contact with oxygen and having a pH of 4 to 10 and being free of mixtures of aromatic amines or derivatives thereof. themselves with polyhydric phenols or derivatives thereof. (Machine-translation by Google Translate, not legally binding)