Hair dye compositions containing 3,5-diamino-2-substituted-alkylbenzenes

US4171203A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• David Rose · Hilden, DE
• Erwin Weinrich · Hilden, DE
• Edgar Lieske · Düsseldorf, DE

Key dates

• Filing date: Jun 20, 1977
• Grant date: Oct 16, 1979
• Expiry date: Jun 20, 1997

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/411
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Dyestuffs of the oxidizable developer-coupler type wherein the coupler is a 3,5-diamino-2-substituted-alkylbenzene of the formula ##STR1## wherein R.sub.1 is straight- or branched-chain alkyl of 1-8 carbon atoms, R.sub.2 is a straight- or branched-chain alkyl of 1-8 carbon atoms, phenyl, or phenyl substituted by alkyl of 1-4 carbon atoms or halogen atoms and the inorganic and organic salts thereof are very satisfactory for coloring hair. They are readily oxidized by atmospheric oxygen at room temperature without a catalyst, and they provide intense, bright and fast dyeings in a short tie. They are applied in conventional manner from an aqueous medium.