Aqueous synthesis of perylene pigments

12 12 12232212212345678 A process for preparing perylene pigments of the general formula (Ia) or (Ib) or mixtures thereof, by reacting perylenetetracarboxylic acids or functional derivatives thereof with aromatic diamines, where R, Rmay be the same or different and may each independently be phenylen...

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Bibliographic Details
Main Authors Loebel, Johannes, Stohr, Andreas
Format Patent
LanguageEnglish
Published 18.12.2012
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Summary:12 12 12232212212345678 A process for preparing perylene pigments of the general formula (Ia) or (Ib) or mixtures thereof, by reacting perylenetetracarboxylic acids or functional derivatives thereof with aromatic diamines, where R, Rmay be the same or different and may each independently be phenylene, naphthylene or pyridylene, where R, Rmay each be mono- or polysubstituted by C-C-alkyl, C-C-alkenyl, C-C-alkoxy, hydroxyl and/or halogen, X, X, X, X, X, X, X, Xmay be the same or different and may each independently be hydrogen or halogen, wherein the reaction is performed in the presence of a secondary or tertiary amine in an aqueous reaction medium.