| abstract |
Cationic dyestuffs of the formula ##STR1## wherein R 1 and R 2 independently of one another represent a lower alkyl, alkenyl or hydroxyalkyl radical, n R 3 represents H or halogen, n R 4 represents H, halogen, or a lower alkyl, alkenyl or alkoxy radical, n R 5 represents H or a lower alkyl radical, n R 6 represents a lower alkyl, alkenyl, halogenoalkyl, alkoxyalkyl, hydroxyalkyl or cyanoalkyl radical and n X - represents an anion, n at least one of the substituents R 3 and R 4 being other than H, are used for dyeing and printing natural and synthetic materials, in particular polyacrylonitrile. |