Oxidation hair dyes comprising substituted dihydroxypyridines as coupling components

US4838893A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• David Rose · Hilden, DE
• Norbert Maak · Neuss, DE
• Edgar Lieske · Düsseldorf, DE

Key dates

• Filing date: Jun 24, 1987
• Grant date: Jun 13, 1989
• Expiry date: Jun 24, 2007

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/4926
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

This invention is directed to compositions of the developer-coupler type of the dyeing of hair, consisting essentially of substituted dihydroxypyridine compounds or salts thereof as coupling components and, as developer components, the conventional components used in oxidation dyes.