US 12,102,704 B2
Oxidative dyeing agent for keratin fibers comprising novel dye precursor combinations
Razi Abbas, Shelton, CT (US); Tugce Cansev, Hamburg (DE); Thomas Hippe, Appen (DE); Astrid Kleen, Haseldorf (DE); Hartmut Manneck, Barnitz (DE); Stefan Hoepfner, Hamburg (DE); and Tiffany Lea Fielder, Norwalk, CT (US)
Assigned to Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Feb. 17, 2023, as Appl. No. 18/111,317.
Claims priority of provisional application 63/314,233, filed on Feb. 25, 2022.
Prior Publication US 2023/0270648 A1, Aug. 31, 2023
Int. Cl. A61Q 5/10 (2006.01); A61K 8/20 (2006.01); A61K 8/22 (2006.01); A61K 8/34 (2006.01); A61K 8/41 (2006.01); A61K 8/46 (2006.01); A61K 8/49 (2006.01)
CPC A61K 8/4973 (2013.01) [A61K 8/20 (2013.01); A61K 8/22 (2013.01); A61K 8/345 (2013.01); A61K 8/411 (2013.01); A61K 8/418 (2013.01); A61K 8/463 (2013.01); A61K 8/4926 (2013.01); A61Q 5/10 (2013.01); A61K 2800/30 (2013.01); A61K 2800/882 (2013.01)] 20 Claims
 
1. An agent for the oxidative dyeing of keratinous fibers, comprising,
(A) the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol and/or at least one of its physiologically tolerated salts, and
(B) the oxidation base 2-(2,5-diaminophenyl)ethanol and/or at least one of its physiologically tolerated salts,
wherein the agent is substantially free of any resorcinol compound of structure (I)

OG Complex Work Unit Chemistry
in which
X means a hydrogen atom or a C1-C10 alkyl group,
wherein the agent is further substantially free of any fluorinated compounds and
wherein the agent is further substantially free of dissolved hydrogen peroxide,
characterized in that the pH of the agent is higher than 8.0, measured at 20° C.