US 12,226,515 B2
Method for colouring hair including pretreatment
Lars Siegfried Dahne, Berlin (DE); Mandy Hecht, Darmstadt (DE); Mathias Kurt Herrlein, Kronberg (DE); Katrin Kaestle, Ober-Ramstadt (DE); Bryan Patrick Murphy, Loveland, OH (US); and Monica Jo Patten, Jeannette, PA (US)
Assigned to WELLA OPERATIONS US, LLC, Calabasas, CA (US)
Appl. No. 16/096,191
Filed by WELLA OPERATIONS US, LLC, Calabasas, CA (US)
PCT Filed Apr. 25, 2017, PCT No. PCT/US2017/029413
§ 371(c)(1), (2) Date Oct. 24, 2018,
PCT Pub. No. WO2017/189574, PCT Pub. Date Nov. 2, 2017.
Claims priority of provisional application 62/326,953, filed on Apr. 25, 2016.
Prior Publication US 2019/0143150 A1, May 16, 2019
Int. Cl. A61K 8/22 (2006.01); A61K 8/84 (2006.01); A61K 8/91 (2006.01); A61Q 5/06 (2006.01); A61Q 5/10 (2006.01)
CPC A61K 8/91 (2013.01) [A61K 8/22 (2013.01); A61K 8/84 (2013.01); A61Q 5/065 (2013.01); A61Q 5/10 (2013.01); A61K 2800/432 (2013.01); A61K 2800/4324 (2013.01); A61K 2800/49 (2013.01); A61K 2800/542 (2013.01); A61K 2800/5424 (2013.01); A61K 2800/5426 (2013.01); A61K 2800/884 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for colouring hair comprising:
carrying out the following sequence of steps:
a) in advance of coloring the hair, pretreating the hair with at least one non-polymeric primer composition to form modified hair,
wherein the non-polymer primer composition comprises an oxidizing agent in combination with a pH of at least 9 and a surfactant, and the non-polymer primer composition does not comprise a dyestuff, a chromophore, a fluorophore, an oxidative dye primary developer, an oxidative dye coupler or a direct dye,
b) optionally repeating step a) at least once,
c) treating the modified hair with a hair colouring system comprising a first composition having a pH of from 7 to 9 and at least one cationic polymer having at least one covalently bonded pendant and/or in-chain chromophore and/or fluorophore to form a cationic polymer layer on the modified hair,
d) overlaying the layer of cationic polymer on the modified hair with a second composition having a pH of from 5 to 6 and at least one anionic polymer optionally having at least one covalently bonded pendant and/or in-chain chromophore and/or fluorophore to form a dual polymeric layer on the modified hair.