Granted Patent B2

US 8,002,850 · App. 12/950,384 · Granted Aug 23, 2011

Abstract

Claims (21)

1. A powder hair coloring or bleaching composition comprising:

a) at least one solid source of carbonate ions, carbamate ions, hydrogencarbonate ions, or mixtures thereof;

b) at least one solid source of oxidizing agent;

c) at least one solid source of ammonium ions; and

d) a crosslinked carboxylic acid polymer thickener having a particle size of no more than about 10 microns in an amount which, upon admixture of the powder composition with water to provide a concentration of from about 1% to about 3%, provides the dispersed composition a viscosity of from about 10000 mPas to about 20000 mPas when measured at 0.5 rpm using Brookfield viscometer spindle S52, and a pH of from about 8.5 to about 9.4.

2. The composition of claim 1 wherein said crosslinked carboxylic acid polymer thickener is a C10 to C30 alkyl acrylate crosspolymer.

3. The composition of claim 1 wherein upon admixture with water the composition generates peroxymonocarbonate ions.

4. The composition of claim 1 wherein the solid source of carbonate ions, carbamate ions, hydrogencarbonate ions, or mixtures thereof is a percarbonate salt.

5. The composition of claim 4 wherein the percarbonate salt is selected from the group consisting of sodium percarbonate, potassium percarbonate, and calcium percarbonate.

6. The composition of claim 1 wherein the solid source of ammonium ions is selected from the group consisting of ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium phosphate, ammonium acetate, ammonium carbonate, ammonium hydrogen carbonate, ammonium carbamate, and ammonium hydroxide.

7. The composition of claim 6 wherein the solid source of ammonium ions is ammonium sulfate.

8. The composition of claim 1 further comprising a radical scavenger.

9. The composition of claim 8 wherein the radical scavenger is selected from the group consisting of alkanol amines and amino acids having an energy of reaction from about 0 kcal/mol to 14 kcal/mol, and a molecular weight of no greater than about 250.

10. The composition of claim 9 wherein the radical scavenger is selected from the group consisting of glucosamine, glycine, glutamic acid, arginine, lysine, glutamine, histidine, serine, and mixtures thereof.

11. The composition of claim 1 further comprising a chelant.

12. A method of coloring or bleaching the hair comprising the steps of:

a) providing the composition of claim 1 ;

b) admixing the composition with a prescribed amount of water;

c) applying the dispersed composition to the hair;

d) allowing the dispersed composition to remain on the hair for from about 2 to about 60 minutes; and

e) rinsing the dispersed composition from the hair.

Assignments (8)