| abstract |
Agents for the oxidative dyeing of hair on the basis of a developer substance-coupler substance combination which, as developer substance, is a 2,5-diaminobenzonitrile of the general formula (I) <IMAGE> in which R <1> and R <2> are independently hydrogen, Are alkyl with 1 to 6 carbon atoms or hydroxyalkyl with 2 to 4 carbon atoms or dihydroxyalkyl with 3 or 4 carbon atoms, provided that the two radicals R 1 and R 2 are not simultaneously hydrogen, or its physiologically compatible, water-soluble Contains salt, as well as new 2,5-diaminobenzonitriles. |