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US 4,297,502 AGranted
Aromatic bisazomethines, a method for their preparation, and their use as reactive pigments
AssigneeDynamit Nobel Aktiengesellschaft
InventorsHans-Joachim Herrmann, Gunther Meyer, Klaus-Dieter Steffen
Life of this patent
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Abstract
An aromatic bisazomethine prepared from the disubstituted benzidines and aromatic aldehydes, characterized by the general formula ##STR1## wherein each R=COOCH.sub.3, COOC.sub.2 H.sub.5, COOH, CH.sub.2 Cl, CHCl.sub.2, CH.sub.2 Br, CCl.sub.3, Cl or Br and each R'=Cl, OCH.sub.3 or CH.sub.3.
Claims12
An aromatic bisazomethine prepared from disubstituted benzidines and aromatic aldehydes, characterized by the general formula ##STR14## wherein each R=COOCH.sub.3, COOC.sub.2 H.sub.5, COOH, CH.sub.2 Cl, CHCl.sub.2, CH.sub.2 Br, CCl.sub.3, Cl or Br and
- each R'=Cl, OCH.sub.3 or CH.sub.3.
Dependencies are inferred from the claim text.