Oxidative dyeing agent for keratin fibers comprising novel dye precursor combinations

US12109291B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Razi Abbas · Shelton, US
• Tugce Cansev · Hamburg, DE
• Thomas Hippe · Appen, DE
• Astrid Kleen · Haseldorf, DE
• Hartmut Manneck · Klein Wesenberg, DE
• Stefan Hoepfner · Hamburg, DE
• Tiffany Lea Fielder · Norwalk, US

Key dates

• Filing date: Feb 17, 2023
• Grant date: Oct 8, 2024
• Expiry date: Feb 17, 2043

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/882
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 2-methoxymethyl-para-phenylenediamine.