Oxidative hair dye precursor compositions containing 4-5-diaminopyrazole, 5-amino-2-methylphenol and m-phenylenediamine compounds and method of dyeing hair

An oxidation dye precursor-containing composition for oxidative dyeing of hair, said composition containing a combination of

• at least one 4,5-diaminopyrazole compound selected from the group consisting of 4,5-diamino-1-ethyl-1H-pyrazole, 4,5-diamino-1-isopropyl-1H-pyrazole, 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-benzyl-1H-pyrazole and 4,5-diamino-1-(4′-methylbenzyl)-1H-pyrazole;
• at least one 5-amino-2-methylphenol compound selected from the group consisting of 5-amino-2-methylphenol and 5-[(2′-hydroxyethyl)amino]-2-methylphenol;
• and
• at least one m-phenylenediamine compound selected from the group consisting of 2,4-diamino-1-(2′-hydroxyethoxy)benzene, 1,3-bis-(2′,4′-diaminophenoxy)propane and 2-amino-4-[(2′-hydroxyethyl)amino]anisole.

A ready-to-apply hair dyeing mixture made by mixing an oxidation dye precursor containing composition with an oxidant in a ratio of from 5:1 to 1:3, said oxidation dye precursor-containing composition containing a combination of

• at least one 4,5-diaminopyrazole compound selected from the group consisting of 4,5-diamino-1-methyl-1H-pyrazole, 4,5-diamino-1-ethyl-1H-pyrazole, 4,5-diamino-1-isopropyl-1H-pyrazole, 4,5-diamino-1-(2′-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-benzyl-1H-pyrazole and 4,5-diamino-1-(4′-methylbenzyl)-1H-pyrazole;
• at least one 5-amino-2-methylphenol compound selected from the group consisting of 5-amino-2-methylphenol, 5-[(2′-hydroxyethyl)amino]-2-methylphenol and 5-methylamino-2-methylphenol;
• and
• at least one m-phenylenediamine compound selected from the group consisting of m-phenylenediamine, 2,4-diamino-1-(2′-hydroxyethoxy)benzene, 2,4-diamino-1-(2′,3′-dihydroxypropoxy)benzene, 1,3-bis-(2′,4′-diaminophenoxy)propane, 2-amino-4-[(2′-hydroxyethyl)amino]anisole and 1,5-bis-(2′-hydroxyethoxy)-2,4-diaminobenzene.

A ready-to-apply hair dyeing mixture made by mixing an oxidation dye precursor containing composition with an oxidant in a ratio of from 5:1 to 1:3, said oxidation dye precursor-containing composition containing a combination of

• at least one 4,5-diaminopyrazole compound selected from the group consisting of 4,5-diamino-1-ethyl-1H-pyrazole, 4,5-diamino-1-isopropyl-1H-pyrazole, 4,5-diamino-1-(2′-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-benzyl-1H-pyrazole and 4,5-diamino-1-(4′-methylbenzyl)-1H-pyrazole;
• at least one 5-amino-2-methylphenol compound selected from the group consisting of 5-amino-2-methylphenol and 5-[(2′-hydroxyethyl)amino]-2-methylphenol;
• and
• at least one m-phenylenediamine compound selected from the group consisting of 2,4-diamino-1-(2′-hydroxyethoxy)benzene, 1,3-bis-(2′,4′-diaminophenoxy)propane and 2-amino-4-[(2′-hydroxyethyl)amino]anisole.

A method of dyeing hair, said method comprising the steps of:

• a) providing an oxidation dye precursor-containing composition containing a combination of at least one 4,5-diaminopyrazole compound selected from the group consisting of 4,5-diamino-1-methyl-1H-pyrazole, 4,5-diamino-1-ethyl-1H-pyrazole, 4,5-diamino-1-isopropyl-1H-pyrazole, 4,5-diamino-1-(2′-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-benzyl-1H-pyrazole and 4,5-diamino-1-(4′-methylbenzyl)-1H-pyrazole;
• at least one 5-amino-2-methylphenol compound selected from the group consisting of 5-amino-2-methylphenol, 5-[(2′-hydroxyethyl)amino]-2-methylphenol and 5-methyl-amino-2-methylphenol;
• and at least one m-phenylenediamine compound selected from the group consisting of m-phenylenediamine, 2,4-diamino-1-(2′-hydroxyethoxy)benzene, 2,4-diamino-1-(2′,3′-dihydroxypropoxy)benzene, 1,3-bis-(2′,4′-diaminophenoxy)propane, 2-amino-4-[(2′-hydroxyethyl)amino]anisole and 1,5-bis-(2′-hydroxyethoxy)-2,4-diaminobenzene;
• b) mixing said oxidation dye precursor-containing composition of step a) with an oxidant in a ratio of from 5:1 to 1:3 to form a ready-to-apply hair dyeing mixture;
• c) applying the ready-to-apply hair dyeing mixture to the hair to be dyed and allowing the ready-to-apply hair dyeing mixture to act on the hair for from 10 to 45 minutes at a temperature of from 15 to 50° C.;
• and
• d) subsequently rinsing the hair with water, washing with a shampoo as needed and then drying the hair.

A method of dyeing hair, said method comprising the steps of:

• a) providing an oxidation dye precursor-containing composition containing a combination of at least one 4,5-diaminopyrazole compound selected from the group consisting of 4,5-diamino-1-ethyl-1H-pyrazole, 4,5-diamino-1-isopropyl-1H-pyrazole, 4,5-diamino-1-(2′-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-benzyl-1H-pyrazole and 4,5-diamino-1-(4′-methylbenzyl)-1H-pyrazole;
• at least one 5-amino-2-methylphenol compound selected from the group consisting of 5-amino-2-methylphenol and 5-[(2′-hydroxy-ethyl)amino]-2-methyl-phenol;
• and at least one m-phenylenediamine compound selected from the group consisting of 2,4-diamino-1-(2′-hydroxyethoxy)benzene, 1,3-bis-(2′,4′-diamino-phenoxy)propane and 2-amino-4-[(2′-hydroxyethyl)amino]anisole;
• b) mixing said oxidation dye precursor-containing composition of step a) with an oxidant in a ratio of from 5:1 to 1:3 to form a ready-to-apply hair dyeing mixture having a pH of from 3 to 11;
• c) applying the ready-to-apply hair dyeing mixture to the hair to be dyed and allowing the ready-to-apply hair dyeing mixture to act on the hair for from 10 to 45 minutes at a temperature of from 15 to 50° C.;
• and
• d) subsequently rinsing the hair with water, washing with a shampoo as needed and then drying the hair.