Patent · US Active

2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azo]-benzoic acid and a process for its preparation

US7923540B2 · kind B2 · utility

0Cited by

3References

6Claims

0Family size

Assignee

BASF SE

Inventors

Hans Reichert · Rheinfelden (Baden), DE
Max Hügin · Moutier, CH
Ulrich Veith · Visp, CH
Sibylle Soder · Sankt Moritz, CH
Thomas Eichenberger · Basel, CH

Key dates

Filing date	Jan 8, 2007
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Jan 8, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/0017
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

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 22.0±0.7, 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.