Process for dyeing the hair using an anionic coloured polymer
AssigneeL'oreal
InventorsMaxime De Boni, Bruno Laguitton
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Abstract
The present invention relates to a process for dyeing keratin fibres, which comprises the application to the fibres of a composition containing at least one cationic polymer, rinsing of the keratin fibres, the application of a composition containing at least one anionic colored polymer, and rinsing of the keratin fibres. Such a process makes it possible to obtain an improvement in the coloration of the keratin fibres.
Claims17
A process for dyeing keratin fibers comprising:
- applying to the fibers a cosmetic composition comprising at least one cationic polymer;
- rinsing the keratin fibers;
- applying to the fibers a cosmetic composition comprising at least one anionic colored polymer is chosen from:
- wherein
- n is an integer ranging from 1 to 500;
- and
- the sum of n’, l, and p is 1;
- and
- rinsing the keratin fibers, thereby providing temporary coloration to said keratin fibers.
A kit for temporarily dyeing keratin fibers comprising a first compartment comprising a cosmetic composition wherein the cosmetic composition in said first compartment comprises at least one cationic polymer having the formula W:
- wherein said cationic polymer is present in an aqueous composition in an amount ranging from 0.01% to 20% by weight, relative to the total weight of the composition;
- and
- a second compartment comprising a cosmetic composition wherein the cosmetic composition in said second compartment comprises at least one anionic colored polymer, wherein said anionic polymer comprises an anionic chromophore substituted with at least one group chosen from sulfonate, carboxylate, phosphate, phosphonate and sulfate, and is present in an aqueous composition in an amount ranging from 0.01% to 20% by weight, relative to the total weight of the composition wherein the at least one anionic colored polymer is chosen from:
- wherein
- n is an integer ranging from 1 to 500;
- and
- the sum of n’, l, and p is 1.
Dependencies are inferred from the claim text.