	US 11,890,366 B2
	Method for dyeing keratin material, comprising the use of an organic C1-C6 alkoxy silane and a copolymer of styrene and maleic acid (anhydride)
Phillip Jaiser, Langenfeld (DE); Caroline Kriener, Duesseldorf (DE); Carsten Mathiaszyk, Essen (DE); Torsten Lechner, Langenfeld (DE); Gabriele Weser, Neuss (DE); Udo Erkens, Willich (DE); Juergen Schoepgens, Schwalmtal (DE); Ulrike Schumacher, Duesseldorf (DE); Claudia Kolonko, Remscheid (DE); and Marc Nowottny, Moenchengladbach (DE)
Assigned to HENKEL AG & CO. KGAA, Duesseldorf, NY (US)
Appl. No. 17/785,885
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
PCT Filed Oct. 16, 2020, PCT No. PCT/EP2020/079196 § 371(c)(1), (2) Date Jun. 15, 2022, PCT Pub. No. WO2021/121727, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 102019219713.2 (DE), filed on Dec. 16, 2019.
Prior Publication US 2023/0058579 A1, Feb. 23, 2023
Int. Cl. A61Q 5/10 (2006.01); A61K 8/58 (2006.01); A61K 8/81 (2006.01)

CPC A61K 8/585 (2013.01) [A61K 8/8147 (2013.01); A61Q 5/10 (2013.01); A61K 2800/432 (2013.01)]

18 Claims

1. A method of dyeing keratinous material in which is applied to the keratinous material:

a first composition (A) comprising:

(A1) one or more organic C₁-C₆alkoxysilanes and/or condensation products thereof, and

(A2) at least one colorant compound chosen from pigments and direct dyes, and

a second composition (B) comprising:

(B1) a copolymer of styrene and maleic acid (anhydride).