| abstract |
By using a fatty acid tauride of the general formula (I) R¹-CO-NR²- (CH₂) n -SO₃⁻M⁺ (I) in which R¹ is a straight chain or branched alkyl group having 10 to 24 carbon atoms and R² represents a hydrogen atom or a C₁-C₆ alkyl group, M⁺ is a hydrogen, ammonium, alkali or alkaline earth metal ion and n is the number 1 or 2, or a mixture of at least two fatty acid aurides of the formula (I) easily dispersible polycyclic pigments from the class of quinacridones and dioxazines are prepared. |