Hair dyes

Claim 2

A composition of the developer-coupler type for the dyeing of human hair, consisting essentially of, as coupler, at least one N-benzyl-m-phenylenediamine derivative of the general formula ##STR10## wherein Ar is a radical selected from the group consisting of ##STR11## of a salt thereof, and, as developer component, one or more of the conventional developer components used in oxidation dyes, the molar ratio of the coupler to the developer being from about 2:1 to 1:2.

Claim 3

The composition of claim 1 wherein p-toluylenediamine is used as developer component.

Claim 4

The composition of claim 1 wherein the composition comprises from about 0.2 to 5 percent by weight of developer-coupler combination.

Claim 5

The composition of claim 3 wherein the composition comprises from about 1 to 3 percent by weight of developer-coupler combination.

Claim 6

The composition of claim 1, wherein the coupler is comprised of two or more N-benzyl-m-phenylenediamine derivatives or salts thereof.

Claim 7

The composition of claim 1 which additionally contains conventional additives selected from the group consisting of conventional couplers and conventional directly absorbing dyes.

Claim 8

A process for the dyeing of hair comprising applying to said hair, at temperatures ranging substantially from about 15° C. to 40° C. for a time sufficient to effect dyeing through oxidation, an effective amount of the developer-coupler composition according to claim 1 in an aqueous medium.

Claim 9

The process for the dyeing of hair of claim 7 wherein the oxidation is also effected by the action of a chemical oxidation agent.

Claim 10

The process of claim 8, wherein the chemical oxidation agent is selected from the group consisting of hydrogen peroxide or its addition compounds with urea, melamine, or sodium borate, and mixtures thereof with potassium peroxydisulfate.

Claim 11

The composition of claim 1, wherein the developer component comprises one or more compounds selected from the group consisting of p-toluylenediamine, 2,4,5,6-tetraaminopyrimidine, 4,5-diamino-2,6-bismethylaminopyrimidine, 2,5-diamino-4,6-bismethylaminopyrimidine, 4,5-diamino-6-butylamino-2-dimethylaminopyrimidine, 2,5-diamino-4-diethylamino-6-methylaminopyrimidine, 4,5-diamino-6-diethylamino-2-dimethylaminopyrimidine, 4,5-diamino-2-diethylamino-6-methylaminopyrimidine, 4,5-diamino-2-dimethylamino-6-ethylaminopyrimidine, 4,5-diamino-2-dimethylamino-6-isopropylaminopyrimidine, 4,5-diamino-2-dimethylamino-6-methylaminopyrimidine, 4,5-diamino-6-dimethylamino-2-methylaminopyrimidine, 4,5-diamino-2-dimethylamino-6-propylaminopyrimidine, 2,4,5-triamino-6-dimethylaminopyrimidine, 4,5,6-triamino-2-dimethylaminopyrimidine, 2,4,5-triamino-6-methylaminopyrimidine, 4,5,6-triamino-2-methylaminopyrimidine, 4,5-diamino-2-dimethylamino-6-piperidinopyrimidine, 4,5-diamino-6-methylamino-2-piperidinopyrimidine, 2,4,5-triamino-6-piperidinopyrimidine, 2,4,5-triamino-6-anilinopyrimidine, 2,4,5-triamino-6-benzylaminopyrimidine, 2,4,5-triamino-6-benzylidenaminopyrimidine, 4,5,6-triamino-2-piperidinopyrimidine, 2,4,6-trismethylamino-5-aminopyrimidine, 2,4,5-triamino-6-di-n-propylaminopyrimidine,

Claim 12

4,5-triamino-6-morpholinopyrimidine, 2,5,6-triamino-4-dimethylaminopyrimidine, 4,5,6-triamino-2-morpholinopyrimidine, 2,4,5-triamino-6-β-hydroxyethylaminopyrimidine, 4,5,6-triamino-2-β-amino-ethylaminopyrimidine, 2,5,6-triamino-4-β-methylamino-ethylaminopyrimidine, 2,5-diamino-4,6-bis-gamma-diethylamino-propylaminopyrimidine, 4,5-diamino-2-methylamino-6-β-hydroxy-ethylaminopyrinidine, 5-amino-2,4,5-triethylaminopyrimidine, and 2,4-bis-β-hydroxyethylamino-6-anilino-5-aminopyrimidine.

Claim 13

4,5-triamino-6-morpholinopyrimidine, 2,5,6-triamino-4-dimethylaminopyrimidine, 4,5,6-triamino-2-morpholinopyrimidine, 2,4,5-triamino-6-β-hydroxyethylaminopyrimidine, 4,5,6-triamino-2-β-amino-ethylaminopyrimidine, 2,5,6-triamino-4-β-methylamino-ethylaminopyrimidine, 2,5-diamino-4,6-bis-gamma-diethylamino-propylaminopyrimidine, 4,5-diamino-2-methylamino-6-β-hydroxy-ethylaminopyrinidine, 5-amino-2,4,5-triethylaminopyrimidine, and 2,4-bis-β-hydroxyethylamino-6-anilino-5-aminopyrimidine.

Claim 14

The composition of claim 1, wherein Ar is the radical of Formula II.

Claim 15

The composition of claim 1, wherein Ar is the radical of Formula III.

Claim 16

The composition of claim 1, wherein Ar is the radical of Formula IV.

Claim 17

The composition of claim 1, which comprises (1) from about 0.2 to 5 percent by weight of developer-coupler combination; (2) from about 0.5 to 30 percent by weight of wetting and emulsifying agents; (3) from about 0.1 to 25 percent by weight of thickeners; and (4) the balance water.

Claim 18

A process for the dyeing of hair comprising applying to said hair, at temperatures ranging substantially from about 15° to 40° C. at a pH of from about 8 to 10 for a time sufficient to effect dyeing through oxidation, an effective amount of the aqueous developer-coupler composition according to claim 10.

Claim 19

The process for the dyeing of hair of claim 15, wherein the oxidation is also effected by the action of a chemical oxidation agent selected from the group consisting of hydrogen peroxide and its addition agents with urea, melamine, or sodium borate, and mixtures thereof with potassium peroxydisulfate.