Polymeric dye compounds and compositions and methods for coloring hair
AssigneeRevlon Consumer Products Corporation
InventorsAlexander C. Chan, Geoffrey Robert Hawkins, Alexander Lukacs, III
Life of this patent
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Abstract
A compound of the formula: wherein: n, y, and z are each independently integers ranging from 1 to 100,000; R1 through R6, and R8 are each independently H, C1-6 alkyl, hydroxyalkyl, substituted or unsubstituted aminoalkyl; or R4 and R5 together form a substituted or unsubstituted heterocyclic 5 to 6 membered ring wherein the substituents are selected from C1-6 alkyl, hydroxyalkyl, or aminoalkyl; R7 is H or SR1, or S—R7 in the above formula together form an isothiouronium salt or Bunte salt; X is a linking group; and D is a chromophore that absorbs visible light; hair dye compositions containing the polymeric compound; and a method for dyeing hair.
Claims20
A compound of the formula:
- wherein:
- n, y, and z are each independently integers ranging from 1 to 100,000;
- R1 through R6 and R8 are each independently H, C1-6 alkyl, hydroxyalkyl, substituted or unsubstituted aminoalkyl;
- or R4 and R5 together form a substituted or unsubstituted heterocyclic 5 to 6 membered ring wherein the substituents are selected from C1-6 alkyl, hydroxyalkyl, or substituted or unsubstituted aminoalkyl;
- R7 is H, SR1, or S and R7 together form an isothiouronium salt or Bunte salt;
- X is a linking group;
- and
- D is a chromophore that absorbs visible light.
A hair dye composition comprising, by weight of the total composition:
- 0.01-40% of a polymeric dye compound of Formula I,
- 0.01-25% of a reducing agent;
- and
- 0.1-99% water.
A method for coloring hair comprising applying an aqueous based hair dye composition containing a polymeric dye compound of Formula I and a reducing agent, to the hair for a period of time sufficient to cause coloration of the hair.
Dependencies are inferred from the claim text.