Dye composition for human keratinous fibres in the form of foam, based on 5,6-dihydroxyindole

Claim 2

A dye composition for human keratinous fibers comprising at least 5,6-dihydroxyindole present in an amount effective to dye said human keratinous fibers and at least 0.1 percent by weight of a foam generator in a cosmetically acceptable aqueous medium, said composition being packaged, under pressure, in an aerosol device in the presence of a propellant agent, under such conditions so as to form a dyeing foam having a density below or equal to 0.4 g/cm 3 when dispensed from said aerosol device.

Claim 3

The dye composition of claim 1 wherein said 5,6-dihydroxyindole is present in an amount ranging from 0.1 to 5 percent by weight based on the total weight of the composition to be pressurized.

Claim 4

The dye composition of claim 1 wherein said 5,6-dihydroxyindole is present in the amount ranging from 0.5 to 2 percent by weight based on the total weight of the composition to be pressurized.

Claim 5

The dye composition of claim 1 wherein said foam generator is an anionic, nonionic, amphoteric or cationic surface-active agent, or a mixture thereof.

Claim 6

The dye composition of claim 4 wherein said surface-active agent is present in an amount ranging from 0.1 to 55 percent by weight based on the total weight of the composition to be pressurized.

Claim 7

The dye composition of claim 4 wherein said surfaceactive agent is present in an amount ranging from 1 to 40 percent by weight based on the total weight of the composition to be pressurized.

Claim 8

The dye composition of claim 1 wherein said foam generator is an anionic, cationic, nonionic or amphoteric foaming polymer.

Claim 9

The dye composition of claim 7 wherein said foaming polymer is selected from the group consisting of: (1) a quaternized vinylpyrrolidone/dialkylaminoalkyl acryhlate and methacrylate copolymer, cellulose ether derivative containing quaternary ammonium group, cellulose copolymer or cellulse derivative grafted with a water-soluble quaternary ammonium group, and apolyoxyethylenated polyamine; (2) an uncrosslinked polymer of acrylic or methacrylic acid or a solt thereof, crotonic acid/vinyl acetate copolymer grafted onto polyalkylene glycol, polymer of maleic acid or anhydride with methacrylic acid, polymer of maleic acid or anhydride ether, and substituted or unsubstituted copolymer of acrylamide and unsaturated carboxylic acid; (3) methacrylic copolymer in betaine form or amphoteric acrylic terpolymer; and (4) partially acetylated polyvinyl alcohol and polyvinyl alcohol ether.

Claim 10

The dye composition of claim 7 wherein said foaming polymer is present in an amount ranging from 0.1 to 5 percent by weight based on the total weight of the composition to be pressurized.

Claim 11

The dye composition of claim 1 wherein said aqueous medium has a pH ranging from 4 to 11.

Claim 12

The dye composition of claim 1 wherein said aqueous medium has a pH ranging from 5 to 9.5.

Claim 13

The dye composition of claim 1 wherein said aqueous medium contains a cosmetically acceptable organic solvent selected from the group consisting of a lower C 1 -C 4 alkanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether and ethylene glycol monoethyl ether acetate, said solvent being present in an amount less than 50 weight percent based on the total weight of the composition to be pressurized.

Claim 14

The dye composition of claim 12 wherein said organic solvent is present in an amount less than 20 percent by weight based on the total weight of the composition to be pressurized.

Claim 15

The dye composition of claim 1 which also includes a thickening agent in an amount ranging from 0.1 to 5 percent by weight based on the total weight of the composition to be pressurized.

Claim 16

The dye composition of claim 1 wherein said propellant agent is a volatile hydrocarbon selected from the group consisting of butane, isobutane, propane, partially fluorinated hydrocarbon, completely fluorinated hydrocarbon and a mixture thereof.

Claim 17

Dyeing foam produced by dispensing said dye composition of claim 1 under pressure from an aerosol device, said dyeing foam having a density below or equal to 0.4 g/cm 3 .

Claim 18

A process for dyeing human keratinous fibes comprising applying to said fibers the dyeing foam of claim 16, said foam being dispensed from an aerosol device.

Claim 19

A process for dyeing human keratinous fibers comprising applying to said fibers the dyeing foam of claim 16, said foam being dispensed from an aerosol device, permitting said foam to remain in contact with said fibers for a period of time ranging from 5 to 30 minutes and rinsing said fibers.

Claim 20

The process of claim 18 wherein said dyeing foam is applied to said fibers several times in succession.