Dye-containing pellets for dyeing keratin fibres
AssigneeWella Aktiengesellschaft
InventorsJuergen Schmenger, Petra Braun, Wolfram Englisch
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Abstract
The present patent application relates to dye-containing pellets obtained by (a) homogeneous mixing of a starting material containing at least one natural and/or synthetic dye with a suitable carrier material and then coating with a suitable encapsulation material or (b) coating a suitable carrier material with a mixture of at least one natural and/or synthetic dye and at least one suitable encapsulation material, to the use of said pellets for preparing colorants for keratin fibers and to the colorants based on said pellets.
Claims12
A coated dye-containing pellet for coloring keratin fibers comprising a dye-containing pellet and a coating material that coats said dye-containing pellet;
- wherein said dye-containing pellet contains a carrier material and from 0.1 to 70 percent by weight of at least one oxidation dye precursor, and said at least one oxidation dye precursor is uniformly mixed in the carrier material.
A method of preparing a colorant for keratin fibers, said method comprising the steps of:
- a) uniformly mixing from 0.5 to 50 percent by weight of at least one oxidation dye precursor with a carrier material to form at least one dye-containing pellet;
- b) coating the at least one dye-containing pellet with a coating material to obtain at least one coated dye-containing pellet;
- and then
- c) mixing the at least one coated dye-containing pellet with an aqueous or aqueous-alcoholic preparation.
Dependencies are inferred from the claim text.