5-halogen-2,4-Bis (alkylamino)-1-alkylbenzenes and hair dye compositions containing same

US5542953A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Wolfgang Balzer · Alsbach, DE
• Thomas Clausen · Alsbach, DE
• Anke Frank · Frankfurt, DE
• Alexa Weinges · Heidelberg, DE

Key dates

• Filing date: Oct 22, 1993
• Grant date: Aug 6, 1996
• Expiry date: Oct 22, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C215/16
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The composition for the oxidative dyeing of hair contains at least one coupler of the general formula ##STR1## where R is a straight-chain or branched C.sub.1 - to C.sub.4 -alkyl group, X is chlorine or fluorine, and R.sup.1 is a straight-chain or branched C.sub.1 - to C.sub.4 -alkyl group or a straight-chain or branched C.sub.2 - to C.sub.4 -hydroxyalkyl group. The 5-halogen-2,4-bis(alkylamino)-1-alkylbenzenes of the formula (I) are novel. The couplers of the general formula (I) may be obtained through simple chemical reactions, are easily soluble in water and have an outstanding shelf stability, in particular as a constituent of the hair dye composition described here. The dyeing results which can be achieved with the hair dye composition according to the invention are particularly distinguished by the color intensity of the red hues, in addition to the multitude of shades, and by a good purity of color with respect to blue hues.