Agent for dyeing hair

US4840639A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Hans Husemeyer · Darmstadt, DE
• Herbert Mager · Freiberg, DE
• Eugen Konrad · Darmstadt, DE

Key dates

• Filing date: Jun 7, 1988
• Grant date: Jun 20, 1989
• Expiry date: Jun 7, 2008

Classification

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

Abstract

Oxidative hair dyeing preparation having a content of a 1-hydroxyalkyl-2,5-diaminobenzene having the formula ##STR1## as developing substance, wherein R denotes hydroxyalkyl having 1 to 4 carbon atoms, or their salts with inorganic or organic acids. Preferably, these hair dyeing preparations will contain 1-hydroxymethyl-2,5-diaminobenzene in a concentration of approximately 0.1 to 3.0 percent by weight, this either alone as a developing substance, or in combination with the conventional coupling substances.