US 11,737,959 B2
Two-part oxidative dyeing composition
Jens Heilmann, Darmstadt (DE); Diana Bauer, Darmstadt (DE); Steven Breakspear, Darmstadt (DE); and Peter Bauer, Darmstadt (DE)
Assigned to Kao Corporation, Tokyo (JP)
Appl. No. 17/773,455
Filed by Kao Corporation, Tokyo (JP)
PCT Filed Oct. 30, 2020, PCT No. PCT/EP2020/080539
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/084085, PCT Pub. Date May 6, 2021.
Claims priority of application No. 19206514 (EP), filed on Oct. 31, 2019.
Prior Publication US 2022/0401319 A1, Dec. 22, 2022
Int. Cl. A61Q 5/10 (2006.01); A61K 8/22 (2006.01); A61K 8/06 (2006.01); A61K 8/34 (2006.01); A61K 8/40 (2006.01); A61K 8/49 (2006.01); A61Q 5/08 (2006.01)
CPC A61K 8/22 (2013.01) [A61K 8/062 (2013.01); A61K 8/34 (2013.01); A61K 8/40 (2013.01); A61K 8/4953 (2013.01); A61Q 5/08 (2013.01); A61Q 5/10 (2013.01); A61K 2800/4322 (2013.01); A61K 2800/48 (2013.01); A61K 2800/596 (2013.01)] 16 Claims
 
1. A two-part oxidative dyeing composition, comprising:
a dyeing composition A having a pH in the range of 7 to 12, comprising:
one or more oxidative dye precursors and/or oxidative dye couplers, and
one or more alkalizing agents, and
an aqueous oxidizing composition B having a pH in the range of 1 to 6, comprising:
a) hydrogen peroxide
b) one or more compounds according to the following structure:

OG Complex Work Unit Chemistry
wherein R1, R2, and R3 are independently selected from H and CH3, and/or their mixtures, and
c) one or more lipophilic compounds,
wherein composition B is an oil-in-water emulsion.