Coloring composition containing L-DOPA and L-arginine and forming a non-covalent derivatization complex
AssigneesWarner Babcock Institute for Green Chemistry, LLC, John Masters Organic Hair Care, Inc.
InventorsJohn C. Warner, Emily J. Stoler
Life of this patent
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Abstract
A natural coloring composition for coloring materials, and methods of its use. The coloring composition comprises a natural precursor aromatic ring molecule such as L-DOPA that is oxidatively oligomerized or polymerized in the presence of arginine and an activator, such as a salt or an enzyme, wherein the L-DOPA and the amino acid form a specific non-covalent interaction. The natural coloring composition can also include a buffer, colorant, stabilizer, and/or thickening agent, and can comprise one or two inactive solutions that are combined to form an active coloring composition.
Claims22
A coloring composition comprising:
- L-3,4-dihydroxyphenylalanine (“L-DOPA”);
- an initiator;
- and
- L-arginine, wherein said L-DOPA is oxidized in the presence of said initiator to form a color polymer, and further wherein said L-DOPA and said L-arginine form a non-covalent interaction.
A method for dyeing a material, the method comprising the steps:
- mixing a first solution comprising L-3,4-dihydroxyphenylalanine (“L-DOPA”) with a second composition comprising an initiator and arginine, wherein said L-DOPA and said arginine form a non-covalent derivatization complex;
- and
- contacting said material with the mixture.
Dependencies are inferred from the claim text.