Inventors:
Hans Reichert - Rheinfelden, DE
Max Hügin - Rünenberg, CH
Ulrich Veith - Hockessin DE, US
Sibylle Soder - Möhlin, CH
Thomas Eichenberger - Basel, CH
International Classification:
C09B 29/32
C09B 29/03
C09B 41/00
C09B 67/48
US Classification:
534575, 534705, 534887, 106496, 524 93
Abstract:
The present invention is directed to 2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxo-propyl]azo]-benzoic acid (C. I. Pigment Yellow 151): (I), characterized by a ΔE* (black/white) in masstone below 22. 00. 7, a process for its preparation and its use for pigmenting macromolecular organic materials of natural or synthetic origin. The pigment has high opacity and high color strength.