Compositions and methods for dyeing keratinous fibers

US7156884B2 · kind B2 · utility

Assignee

• Wella GmbH · DE

Inventors

• David Rozzell · Santa Monica, US
• Juergen Allwohn · Burgschwalbach, DE
• Laurent Chassot · Praroman, CH
• Cecile Pasquier · Marly, CH
• Guido Sauter · Marly, CH
• Veronique Buclin-Charriere · Morlon, CH

Key dates

• Filing date: Feb 20, 2003
• Grant date: Jan 2, 2007
• Expiry date: Jun 27, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/88
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Pro-dyes of direct dyes having an enzymatically-labile functionality, e.g. glutaramide derivatives of direct dyes of formula (I) or their physiologically acceptable salts,are described, as well as compositions for dyeing keratinous fibers containing these pro-dyes, as well as compositions for dyeing keratinous fibers containing a combination of at least one pro-dye and at least one enzyme capable of cleaving the glutaramide functionality in the pro-dye. A method for dyeing keratinous fibers with the aforementioned dyeing compositions is also described.