Difficultly water-soluble anthraquinone dyestuffs

Abstract

Abstract WHEREIN R1 represents hydrogen or lower alkyl, R3 represents hydrogen, lower alkyl, hydroxy-lower alkyl, alkenyl of at most four carbon atoms, cyclohexyl or benzyl, and R4 represents hydrogen, lower alkyl, hydroxy-lower alkyl or R3 and R4 taken together with the nitrogen atom to which they are linked, represent pyrrolidino, piperidino or morpholino, Z represents phenyl or phenyl monosubstituted by chlorine, bromine, fluorine, nitro, lower alkyl, lower alkoxy, hydroxylower alkyl, lower alkoxy-carbonyl, lower alkyl-sulfonyl or lower alkyl-sulfonyloxy, AND RING A bears no further substituents or is further monosubstituted by methyl, methoxy or chlorine, are particularly suited for the dyeing of hydrophobic organic fiber materials, especially polyethylene glycol terephthalate fibers but also other polyester fibers and synthetic polyamide and polyacrylonitrile fibers. The dyeings on polyethylene glycol terephthalate have great color strength and excellent fastness to sublimation and light. Dyestuffs free from salt-forming, water-solubilizing groups which dissociate acid in water which are of the formula

Inventors

• 👤 Hans Peter Kolliker
• 👤 Mario Christen

Bibliographic Details