Zwitterionic azo dyestuffs for coloring keratin-including fibres

US8864848B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Wibke Gross · Mülheim an der Ruhr, DE
• Ralph Nemitz · Frechen, DE
• Melanie Moch · Dormagen, DE

Key dates

• Filing date: May 5, 2014
• Grant date: Oct 21, 2014
• Expiry date: May 5, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/4322
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to agents for coloring keratinic fibers, in particular human hair, including in a cosmetic carrier at least one compound of the formula (I). The structures the of the general formula (I) have a heterocycle A which bears a quaternary nitrogen atom and thus a positive charge. The invention furthermore relates to the use of these novel azo dyes in agents for coloring hair and to the dyes themselves.