Hair coloring compositions
AssigneeWella Germany GmbH
InventorsViktoriya Sendyureva, Manfred Guenther Schmitt, Frank Veverka, Felix Herkner, Bjorn Timo Hoffmann
Life of this patent
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Abstract
It is provided a kit for obtaining a hair coloring composition, a hair coloring composition, and a method for treating hair. The hair coloring composition particularly provides the desired color shade and intensity, together with an enhanced root to tip evenness on hair, particularly on previously colored hair and on hair with a broad range of damage levels along hair length.
Claims16
A kit comprising a dye component and an oxidative component, for obtaining a hair coloring composition upon the mixing of the dye component and the oxidative component in a weight ratio from 3:1 to 1:3, wherein the hair coloring composition has a pH of about 7.2 to 7.9 upon mixing and a pH of about 6.5 to 7 after at least about 20 minutes post mixing;
- wherein the dye component has a pH from 8.5 to 10, and comprises, by total weight of the dye component:
- at least one alkalizing agent present in an amount from 0.2 to 4%;
- a chelant mixture of EDTA and EDDS present in an amount of the mixture of from 1.2 to 1.8%;
- at least one buffering acidic compound present in an amount from 0.01 to 0.6%;
- wherein the buffering acidic compound is citric acid;
- at least one anionic surfactant present in an amount from 0.2 to 1%;
- at least one fatty alcohol present in an amount from 1.6 to 2.5%;
- at least one non-ionic surfactant present in an amount from 0.1 to 0.5%;
- at least one oxidative hair dye precursor and at least one coupler present altogether in an amount of 20% or less;
- and
- at least one solvent present in an amount from at least 50%;
- and
- wherein the oxidative component has a pH from 1.8 to 3.5, and comprises, by total weight of the oxidative component:
- at least one oxidizing agent present in an amount from 1 to 3%;
- at least one buffering acidic compound present in an amount from 0.15 to 0.5%;
- wherein the buffering acidic compound is phosphoric acid;
- at least one buffering alkali compound present in an amount from 0.2 to 0.6%;
- wherein the buffering alkali compound is disodium phosphate;
- and
- wherein the % of phosphoric acid is lower than or equal to the % of disodium phosphate;
- and
- at least one solvent present in an amount from at least 50%.
A hair coloring composition having a pH from 7.2 to 7.99, wherein the hair coloring composition comprises, by total weight of the composition:
- at least one alkalizing agent present in an amount from 0.1 to 2%;
- at least one oxidizing agent present in an amount from 0.5 to 1.5%;
- a chelant mixture of EDTA and EDDS wherein the mixture is present in an amount from 0.6 to 0.9%;
- at least a first buffering acidic compound present in an amount from 0.05 to 0.3%,
- wherein the first buffering acidic compound is citric acid;
- at least a second buffering acidic compound present in an amount from 0.075 to 0.25%, wherein the second buffering acidic compound is phosphoric acid;
- at least one buffering alkali compound present in an amount from 0.1 to 0.3%, wherein the buffering alkali compound is disodium phosphate, wherein the % of phosphoric acid is lower than or equal to the % of disodium phosphate;
- a gel network thickener system present in an amount from 1.2 to 4.5%, wherein the gel network thickener system comprises at least one anionic surfactant, at least one fatty alcohol and at least one non-ionic surfactant;
- at least one oxidative hair dye precursor and at least one coupler present altogether in an amount of 10% or less;
- and
- at least one solvent present in an amount from at least 50%, and;
- wherein the pH of the hair coloring composition reduces to a pH of about 6.5 to 7 in at least about 20 minutes after formation.
Dependencies are inferred from the claim text.