Oxidation hair-dyeing preparations

摘要

Oxidation hair-dyeing preparations which contain as couplers N-(2-4dihydroxbenzylidene)-amino compounds corresponding to the following formula <IMAGE> (I) in which A is a group corresponding to one of the following formulae <IMAGE> (II) <IMAGE> (III) <IMAGE> (IV) <IMAGE> (V) <IMAGE> (VI) or salts thereof and the developers normally present in oxidation hair dyes. p-Phenylenediamine and derivatives thereof are particularly suitable as developers. Yellow to olive-brown colors of high fastness are obtained.