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US 6,648,925 B1Granted
Coloring agent comprising transition metals
AssigneeHenkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
InventorsBernd Mayer, Peter Kuhm, Horst Hoeffkes, Gertrud Ewald, Hans-Oscar Stephan, Melita Heller
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Abstract
The present invention relates to a composition for coloring keratin fibers and a method of using the same. The composition of the present invention contains at least one dye precursor, and one or more clathrate compounds that contain transition metal complexes.
Claims19
A composition for coloring keratin fibers comprising
- (a) one or more clathrate compounds having cavities;
- (b) one or more transition metal complexes, located within the cavities of the clathrate compounds, wherein the transition metal complex comprises (i) from 0.0001 weight percent to 1.0 weight percent, based on the total weight of the composition, of at least one transition metal cation having at least two stable oxidation stages, and (ii) at least one multidentate ligand complexed with the transition metal cation;
- and
- (c) at least one dye precursor for coloring keratin fibers.
1 more element
A method for coloring keratin fibers comprising applying a composition to keratin fibers, wherein the composition comprises
- (a) one or more clathrate compounds having cavities;
- and
- (b) one or more transition metal complexes, located within the cavities of the clathrate compounds, wherein the transition metal complex comprises (i) from 0.0001 weight percent to 1.0 weight percent, based on the total weight of the composition, of at least one transition metal cation having at least two stable oxidation stages, and (ii) at least one multidentate ligand complexed with the transition metal cation.
Dependencies are inferred from the claim text.