Agent for coloring keratin fibres

US7648535B2 · kind B2 · utility

Assignee

• Wella GmbH · DE

Inventors

• Juergen Schmenger · Weiterstadt, DE
• Petra Braun · Munster, DE
• Jolanthe Kujawa · Darmstadt, DE
• Martina Glattefelder · Heddesheim, DE
• Anne Entzminger · Griesheim, DE
• Anette Sallwey · Griesheim, DE
• Herbert Deutz · Zwingenberg, DE

Key dates

• Filing date: Jul 6, 2004
• Grant date: Jan 19, 2010
• Expiry date: Dec 9, 2024

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q5/10
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The agent for coloring keratin fibers is free of chemical oxidants, is in the form of an aqueous or aqueous-alcoholic dye-containing preparation, and contains a combination of oxidation dyes and at least three direct dyes. The agent is characterized by a quantitative ratio of oxidation dyes to direct dyes equal to 5:1 to 0.5:1. A method of dyeing hair is described in which the agent is applied to hair and allowed to act on the hair for an acting time of 5 to 60 minutes without addition of chemical oxidants, so that air oxidation provides a uniform and stable coloration of the hair.