Dyeing compositions for keratin fibers based on direct dyestuffs and xanthane gums

Claim 2

A dyeing composition for the direct colouring of human hair which comprises about 0.001 to 5% by weight of an acidic or non-ionic direct dyestuff and 0.2 to 5% by weight of a xanthane gum, said xanthane gum being a polysaccharide produced by the fermentation of a sugar and said xanthane gum having a molecular weight of from 1,000,000 to 50,000,000 and a viscosity in 1% aqueous solution of from 850 to 1600 cps, measured by a Brookfield LVT viscometer at 60 rpm.

Claim 3

A composition according to claim 1, which further includes an aqueous cosmetically acceptable medium comprising water or a mixture of water and a solvent, said solvent being present in a proportion of 0.5 to 20% by weight relative to the total weight of the composition, wherein said solvent is selected from the group consisting of an alcohol, glycol, glycol ether, and diethyleneglycol alkylether.

Claim 4

A composition according to claim 1, in which the xanthane gum is present in a proportion of 0.5 to 3% by weight relative to the total weight of the composition.

Claim 5

A composition according to claim 1, in which the direct dyestuff is selected from the group consisting of a nitro derivative of the benzene series, an indoamine dyestuff, and an acidic or dispersed anthraquinone dyestuff.

Claim 6

A composition according to claim 4 in which said nitro derivative is selected from the group consisting of a nitrophenylenediamine, a nitroaniline, a nitrophenol and a nitropolyphenol.

Claim 7

A composition according to claim 1, which contains 0.1 to 50% by weight of a member selected from the group consisting of anionic, cationic, amphoteric, and non-ionic surface-active agents.

Claim 8

A composition according to claim 1, which is in a form selected from the group consisting of a thickened liquid, a gelled liquid, a foaming cream, a foaming gel and an aerosol foam.

Claim 9

A process for dyeing human hair, comprising: in a first step, subjecting the hair to a lightening treatment by applying thereto a composition selected from the group consisting of an ammoniacal solution of hydrogen peroxide, a solution of hydrogen peroxide containing aliphatic or hydroxyaliphatic amines, an ammoniacal solution of alkali metal peroxides, persalts or urea peroxide and a mixture of hydrogen peroxide and melamine perhydrate, for a period of 5 to 30 minutes; said composition in an amount effective to lighten the color of the hair; in a second step, rinsing the hair with water; and in a third step, applying a composition containing in a cosmetically acceptable medium between 0.001 and 5% by weight of a direct dyestuff, and 0.2 to 5% by weight of a xanthane gum, said xanthane gum being a polysaccharide produced by the fermentation of a sugar, and said xanthane gum having a molecular weight of from 1,000,000 to 50,000,000 and a viscosity in a 1% aqueous solution of from 850 to 1600 cps, measured by a Brookfield LVT viscometer at 60 rpm.

Claim 10

A process for dyeing human hair, comprising: in a first step, subjecting the hair to a lightening treatment by applying thereto a composition selected from the group consisting of an ammoniacal solution of hydrogen peroxide, a solution of hydrogen peroxide containing aliphatic or hydroxyaliphatic amines, an ammoniacal solution of alkali metal peroxides, persalts or urea peroxide and a mixture of hydrogen peroxide and melamine perhydrate, for a period of 5 to 30 minutes; said composition in an amount effective to lighten the color of the hair; in a second step, rinsing the hair with water; and in a third step, applying a composition containing in a cosmetically acceptable medium between 0.001 and 5% by weight of a direct dyestuff, and 0.2 to 5% by weight of a xanthane gum, said xanthane gum being a polysaccharide produced by the fermentation of a sugar, and said xanthane gum having a molecular weight of from 1,000,000 to 50,000,000 and a viscosity in a 1% aqueous solution of from 850 to 1600 cps, measured by a Brookfield LVT viscometer at 60 rpm.

Claim 11

A process for the direct coloring of human hair, comprising: applying to said hair a composition comprising in a cosmetically acceptable medium between 0.001 and 5% by weight of a direct dyestuff and 0.2 to 5% by weight of a xanthane gum, said xanthane gum being a polysaccharide produced by the fermentation of a sugar and said xanthane gum having a molecular weight of from 1,000,000 to 50,000,000 and a viscosity in a 1% aqueous solution of from 850 to 1600 cps, measured by a Brookfield LVT viscometer at 60 rpm.

Claim 12

A process for the direct coloring of human hair, comprising: applying to said hair a composition comprising in a cosmetically acceptable medium between 0.001 and 5% by weight of a direct dyestuff and 0.2 to 5% by weight of a xanthane gum, said xanthane gum being a polysaccharide produced by the fermentation of a sugar and said xanthane gum having a molecular weight of from 1,000,000 to 50,000,000 and a viscosity in a 1% aqueous solution of from 850 to 1600 cps, measured by a Brookfield LVT viscometer at 60 rpm.

Claim 13

The process of claim 9 wherein said direct dyestuff is selected from the group consisting of a nitro derivative of the benzene series, an indomaine dyestuff, a diarylmethane dyestuff, a triarylmethane dyestuff, a xanthene dyestuff, an acridine dyestuff, an azine dyestuff, an azo dyestuff, and an anthraquinone dyestuff.

Claim 14

The process of claim 10 wherein said nitro derivative is selected from the group consisting of a nitrophenylenediamine, a nitroaniline, a nitrophenol and a nitropolyphenol, said anthraquinone dyestuff is selected from the group consisting of basic, acidic and disperse anthraquinone dyestuffs, and the azo dyestuff is selected from the group consisting of monoazo, diazo, and metalliferous dyestuffs.