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US 6,537,330 B1Granted
Colorants
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHorst Hoeffkes, Klaus Schumann, Winifried Neuhaus
Life of this patent
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Abstract
A composition for coloring keratin fibers, containing an indoline, an indole, or a derivative thereof in combination with at least one amino acid or oligopeptide. The composition is useful for coloring human hair and restoring grey hair to its natural color. The formulation can be applied with atmospheric oxygen as the sole oxidizing agent.
Claims17
A composition for restoring gray keratin fibers to a natural color comprising:
- a) from 0.05 percent by weight to 10 percent by weight of a dye precursor comprising at least one indoline or indole, wherein the indoline or indole serves as a precursor to melanin;
- and
- b) from 0.1 percent by weight to 10 percent by weight of an alpha-aminocarboxylic acid selected from the group consisting of arginine, ornithine, lysine, histidine, and mixtures thereof, wherein the alpha-aminocarboxylic acid has a pH of 9 or greater in water at a concentration of 2.5 percent by weight, wherein the composition restores gray keratin fibers to their natural color, and wherein said weight percents are based on the total weight of the composition.
A method of restoring gray keratin fibers to their natural color comprising
- (a) forming a composition comprising
- (i) a dye precursor comprising at least one indoline, indole, or derivative thereof, wherein the indoline, indole or derivative thereof serves as a precursor to melanin;
- and
- (ii) an alpha-aminocarboxylic acid selected from the group consisting of arginine, ornithine, lysine, histidine, and mixtures thereof, wherein the alpha-aminocarboxylic acid has a pH of 9 or greater in water at a concentration of 2.5 percent by weight;
- and
- (b) applying the composition to gray keratin fibers to restore the gray keratin fibers to their natural color.
3 more elements
A composition for coloring keratin fibers comprising
- (a) a dye precursor comprising at least one indoline or indole;
- and
- (b) an alpha-aminocarboxylic acid selected from the group consisting of arginine, ornithine, lysine, histidine, and mixtures thereof having a pH of 9 or greater in water at a concentration of 2.5 percent by weight;
- wherein the composition contains no other dye precursor or dye, except for the indoline or indole.
1 more element
Dependencies are inferred from the claim text.