Cationic dyes, their preparation and their use in the dyeing of cationically dyeable fibres and paper

摘要

Cationic dyes of the general formula IMAGE in which R represents hydrogen or an alkyl radical with a maximum of 8 C atoms optionally substituted by nonionic radicals, R¹ for hydrogen or an alkyl radical optionally substituted by nonionic radicals with a maximum of 4 C atoms and An - for are an anion, and in which the benzene and naphthalene rings can contain nonionic residues customary in dye chemistry, are used for dyeing natural and synthetic cationically dyeable fibers and paper.