	US 12,109,298 B2
	Improving the fastness to washing of pigment-containing dyes by using an oxidative pretreatment agent
Constanze Kruck, Grevenbroich (DE); Sandra Hilbig, Bochum (DE); Melanie Moch, Dormagen (DE); and Daniela Kessler-Becker, Leverkusen (DE)
Assigned to HENKEL AG & CO. KGAA, Duesseldorf, NY (US)
Appl. No. 17/913,725
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
PCT Filed Feb. 1, 2021, PCT No. PCT/EP2021/052236 § 371(c)(1), (2) Date Sep. 22, 2022, PCT Pub. No. WO2021/190810, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 102020203743.4 (DE), filed on Mar. 24, 2020.
Prior Publication US 2023/0099251 A1, Mar. 30, 2023
Int. Cl. A61Q 5/10 (2006.01); A61K 8/22 (2006.01); A61K 8/23 (2006.01); A61K 8/25 (2006.01); A61K 8/898 (2006.01)

CPC A61K 8/898 (2013.01) [A61K 8/22 (2013.01); A61K 8/23 (2013.01); A61K 8/25 (2013.01); A61Q 5/10 (2013.01); A61K 2800/4324 (2013.01); A61K 2800/884 (2013.01)]

20 Claims

1. A process for dyeing keratinous material comprising:

applying a pre-treatment agent (V) to the keratinous material, wherein the pre-treatment agent in a cosmetic carrier comprises at least one oxidizing agent (V-1),

after applying the pre-treatment agent (V) to the keratinous material, exposing the pretreatment agent to the keratinous fibers for a period of 2 to 45 minutes;

rinsing out the pretreatment agent with water;

after rinsing out the pretreatment, applying a colorant (F) to the keratinous material, the colorant being in a cosmetic carrier and comprising (F-1) at least one amino-functionalized silicone polymer and (F-2) at least one pigment;

exposing the colorant to the keratinous fibers for a period of from 15 seconds to 45 minutes, and

rinsing out the colorant with water.