Method for dyeing keratinous material, including the application of an organosilicon compound, a dyeing compound, a sealing reagent and an alkaline pre-treatment agent

US12296036B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Juergen Schoepgens · Schwalmtal, DE
• Torsten Lechner · Langenfeld, DE
• Phillip Jaiser · Langenfeld, DE
• Avni Tairi · Duisburg, DE
• Carolin Kruppa · Hilden, DE
• Marc Nowottny · Genhülsen, DE
• Carsten Mathiaszyk · Essen, DE
• Andreas Walter · Egloffstein, DE

Key dates

• Filing date: May 31, 2022
• Grant date: May 13, 2025
• Expiry date: May 31, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/884
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method for dyeing keratinous material, in particular human hair, is described. An agent (v) is applied to the keratinous material. The agent (v) includes at least one polyethylene glycol having an average molecular mass of 200 to 8000 g/mol, at least one aliphatic alcohol, and at least one alkalizing reagent application of an agent (a) to the keratinous material. The agent (a) comprises at least one organosilicon compound from silanes having one, two or three silicon atoms. An agent (b) is applied to the keratinous material, where the agent (b) includes at least one sealing reagent. At least one of agents (a) and (b) additionally includes at least one dyeing compound from the group consisting of pigments and direct dyes.