Two-part aqueous composition for oxidative coloration of hair

. A composition as in claim 4 wherein:

• a:
• the pH of the lotion is from 9.0 to 10.5, the primary intermediate and coupler content is from 0.005% to 2.5% by weight, the content of cationic polymer is from 0.5% to 3.0% by weight, the anionic, nonionic, or amphoteric surfactant or mixture thereof content is from 2% to 8% by weight;
• and
• b:
• the pH of the aqueous developer is from 2.5 to 4.5, the peroxide oxidizer content is from 0.5% to 30% by weight hydrogen peroxide, the anionic polymer content is 0.5% to 4% by weight, and the water content is from about 70% to about 95% by weight.

A composition as in claim 5 wherein:

• the amphoteric surfactant is selected from the group consisting of lauryl betaine, lauroamphoglycinate, lauroamphopropylsulfonate, lauroamphopropionate, lauroamphocarboxyglycinate, lauryl sultane, myristamidopropyl betaine, myristyl betaine, myristoamphoglycinate, myristyl propionate, stearoamphoglycinate, cocamidoethyl betaine, cocamidopropyl betaine, cocamidopropyl hydroxysultane, cocamidopropyl dimethylamine propionate, cocoamphoglycinate, cocoamphocarboxypropionate, cocoamphocarboxyglycinate, coco-betaine, cocoamphopropionate, and cocoamphopropylsulfonate;
• and
• the primary intermediate is selected from the group consisting of 2-methyl-benzene-1,4-diamine, benzene-1,4-diamine, 2-(2,5-diamino-phenyl)-ethanol, 1-(2,5-diamino-phenyl)-ethanol, 2-[(4-amino-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol. 4-amino-phenol, 4-methylamino-phenol, 4-amino-3-methyl-phenol, 1-(5-amino-2-hydroxy-phenyl)-ethane-1,2-diol, 2-amino-phenol, 2-amino-5-methyl-phenol, 2-amino-6-methyl-phenol, N-(4-amino-3-hydroxy-phenyl)-acetamide, pyrimidine-2,4,5,6-tetramine and 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol;
• and
• the coupler is selected from the group consisting of:
• benzene-1,3-diol, 4-chlorobenzene-1,3-diol, naphthalen-1-ol, 2-methyl-naphthalen-1-ol, 2-methyl-benzene-1,3-diol, 2-(2,4-diamino-phenoxy)-ethanol, 2-(3-amino-4-methoxy-phenylamino)-ethanol, 2-[2,4-diamino-5-(2-hydroxy-ethoxy)-phenoxy]-ethanol, 3-(2,4-diamino-phenoxy)-propan-1-ol, 3-amino-phenol, 5-amino-2-methyl-phenol, 5-(2-hydroxy-ethylamino)-2-methyl-phenol, 3-amino-2-methyl-phenol, 3,4-dihydro-2H-1,4-benzoxazin-6-ol, 4-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one,and 1H-indol-6-ol, and 2-aminopyridin-3-ol.

A method of coloring human hair which comprises contacting the hair with a mixture of a two-part aqueous composition which forms a gel on mixing of the two parts comprising:

• (a) an aqueous lotion first, part having a pH of from about 7 to about 11 containing from about 0.005% to about 5% by weight of at least one primary intermediate and at least one coupler for the formation of oxidation dyes, from about 0.1% to about 5% by weight of a cationic polymer, from about 0.5% to about 15% by weight of an anionic, nonionic or amphoteric surfactant or mixture thereof and at least 70% by weight water, wherein the cationic polymer is mixed with the surfactant in water at a pH above 7 to form an insoluble precipitate which does not readily dissolve upon the addition of more of the surfactant;
• and
• (b) an aqueous developer second part having a pH of from about 2 to about 6 containing from about 0.5% to about 40% by weight of a peroxide oxidizer, at least about 70% by weight water and from 0.1% to about 6% by weight of a water insoluble anionic polymer;
• wherein the anionic polymer is an acrylate/beheneth-25 methacrylate copolymer and is insoluble in the developer but dissolves to form said gel when the lotion and developer are mixed, and maintaining such contact until the hair is permanently colored.