Hair dyeing agent

US4395262A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

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

Key dates

• Filing date: Apr 16, 1980
• Grant date: Jul 26, 1983
• Expiry date: Apr 16, 2000

Classification

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

Abstract

Agents for the oxidative dyeing of hair, containing as coupling substance at least one derivative of 1,2-methylene dioxybenzene of the general formula ##STR1## in which R signifies an OH--, NH.sub.2 --, NHR.sup.1 -- or NR.sup.1 R.sup.2 -group, wherein R.sup.1 and R.sup.2 represent, independently of each other, an alkyl-, hydroalkyl-, or acyl group with 1 to 4 carbon atoms. The coupling substance is contained in these agents in a concentration of about 0.01 to 3.0 percent by weight, i.e. in a mixture with customary developing substances and, in given instances, also customary coupling substances. The particular possibility exists of producing dark natural tints by a mixture of 4-oxy-1,2-methylene dioxybenzene with the developing substance p-aminophenol.