Agents for coloring keratin fibers comprising zwitterionic azomethine dyes

US7513918B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Cecile Pasquier · Marly, CH
• Veronique Buclin · Morlon, CH
• Anita Roulin · Villarlod, CH
• Hans-Jurgen Braun · Frielendorf, DE

Key dates

• Filing date: Apr 19, 2007
• Grant date: Apr 7, 2009
• Expiry date: May 29, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q5/065
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to agents for coloring keratin fibers which comprise at least one zwitterionic azomethine dye of the general formula (I), (II), or (III)in which z is a heterocycle of the formulain which R8 is an alkyl sulfonate radical of the formula (XIII);