Patent · US Expired

4-Methyl-5-(benzimidazolonylazo)-6-hydroxypyridone-2 pigment

US4088641A · kind A · utility

1Cited by

5References

1Claims

0Family size

Assignee

Ciba-Geigy · US

Inventors

Stefan Hari · Allschwil, CH
Rolf Muller · Karben, DE
Rudolf Mory · Dornach, CH

Key dates

Filing date	Feb 17, 1976
Grant date	May 9, 1978
Priority date	—
Expiry date	Feb 17, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B29/3634
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Azo pigments of the formula ##STR1## wherein A represents the radical of a heterocyclic diazo component are valuable pigments coloring plastics, melts, spinning solutions, lacquers paints and printing inks in yellow to red shades of great color strength and excellent fastness properties.

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