Dyeing agent for dyeing keratin fibres

Claim 1

A hair dye composition for dyeing hair, said hair dye composition comprising a combination of oxidation dye precursors, said oxidation dye precursors comprising at least one p-phenylenediamine derivative compound selected from the group consisting of 2-hydroxymethyl-p-phenylenediamine, 2-(2',5'-diamino-phenyl)ethanol and 2-(2'-hydroxyethoxy)-p-phenylenediamine; at least one m-phenylenediamine derivative compound selected from the group consisting of 2-(2',4'-diaminophenoxy)-ethanol, 1,3-bis-(2',4'-diamino-phenoxy)propane, bis-(2',4'-diamino-phenoxy)-methane, 2-amino-4-((2'-hydroxyethyl)amino)anisole, 1-(2'-aminoethoxy)-2,4-diaminobenzene, 2-(2'-hydroxyethoxy)-5-(methylamino)aniline, 2,4-diamino-1,5-bis-(2'-hydroxyethoxy)-benzene and 1-(2',3'-dihydroxypropoxy)-2,4-diaminobenzene; and at least one 2-amino-6-chloro-4-nitrophenol compound having the general formula (1): ##STR3## wherein R represents hydrogen, a straight- or branched-chain alkyl group with 1 to 6 carbon atoms, a hydroxyalkyl group with 2 to 4 carbon atoms or a straight or branched-chain polyhydroxyalkyl group with 3 to 4 carbon atoms.

Claim 14

A method for oxidative dyeing hair, said method comprising the steps of: a) mixing a hair dye composition with an oxidant in a weight ratio of 5:1 to 1:3 to form a ready-to-use hair dyeing mixture having a pH of from 3 to 11; b) applying a sufficient amount of said ready-to-use hair dyeing mixture to the hair to dye the hair, c) after the applying, allowing said ready-to-use hair dyeing mixture to act on the hair at a temperature of 15 to 50° C. for 10 to 45 minutes; and d) subsequently rinsing the hair with water and then drying the hair; wherein said hair dye composition comprises a combination of oxidation dye precursors, said combination comprising: at least one p-phenylenediamine derivative compound selected from the group consisting of 2-hydroxymethyl-p-phenylenediamine, 2-(2',5'-diamino-phenyl)ethanol and 2-(2'-hydroxyethoxy)-p-phenylenediamine, at least one m-phenylenediamin a derivative compound selected from the group consisting of 2-(2',4'-diaminophenoxy)-ethanol, 1,3-bis-(2',4'-diamino-phenoxy)propane, bis-(2',4'-diamino-phenoxy)-methane, 2-amino-4-((2'-hydroxyethyl)amino)anisole, 1-(2'-aminoethoxy)-2,4-diaminobenzene, 2-(2'-hydroxyethoxy)-5-(methylamino)aniline, 2,4-diamino-1,5-bis-(2'-hydroxyethoxy)-benzene and 1-(2',3'-dihydroxypropoxy)-2,4-diaminobenzene; and at least one 2-amino-6-chloro-4-nitrophenol compound having the general formula (1): ##STR5## wherein R represents hydrogen, a straight- or branched-chain alkyl group with 1 to 6 carbon atoms, a hydroxyalkyl group with 2 to 4 carbon atoms or a straight or branched-chain polyhydroxyalkyl group with 3 to 4 carbon atoms.

Claim 15

A method for oxidative dyeing hair, said method comprising the steps of: a) mixing a hair dye composition with an oxidant in a weight ratio of 5:1 to 1:3 to form a ready-to-use hair dyeing mixture having a pH of from 3 to 11; b) applying a sufficient amount of said ready-to-use hair dyeing mixture to the hair to dye the hair, c) after the applying, allowing said ready-to-use hair dyeing mixture to act on the hair at a temperature of 15 to 50° C. for 10 to 45 minutes; and d) subsequently rinsing the hair with water and then drying the hair; wherein said hair dye composition comprises a combination of oxidation dye precursors, said combination comprising: at least one p-phenylenediamine derivative compound selected from the group consisting of 2-hydroxymethyl-p-phenylenediamine, 2-(2',5'-diamino-phenyl)ethanol and 2-(2'-hydroxyethoxy)-p-phenylenediamine, at least one m-phenylenediamin a derivative compound selected from the group consisting of 2-(2',4'-diaminophenoxy)-ethanol, 1,3-bis-(2',4'-diamino-phenoxy)propane, bis-(2',4'-diamino-phenoxy)-methane, 2-amino-4-((2'-hydroxyethyl)amino)anisole, 1-(2'-aminoethoxy)-2,4-diaminobenzene, 2-(2'-hydroxyethoxy)-5-(methylamino)aniline, 2,4-diamino-1,5-bis-(2'-hydroxyethoxy)-benzene and 1-(2',3'-dihydroxypropoxy)-2,4-diaminobenzene; and at least one 2-amino-6-chloro-4-nitrophenol compound having the general formula (1): ##STR5## wherein R represents hydrogen, a straight- or branched-chain alkyl group with 1 to 6 carbon atoms, a hydroxyalkyl group with 2 to 4 carbon atoms or a straight or branched-chain polyhydroxyalkyl group with 3 to 4 carbon atoms.