Patent · US Expired

Method for producing disazo pigments

US7262284B2 · kind B2 · utility

2Cited by

8References

20Claims

0Family size

Assignee

Clariant Produkte (Deutschland) GmbH · DE

Inventors

Olaf Schupp · Frankfurt am Main, DE
Felix Grimm · Königsee, DE
Manfred Opravil · Karben, DE
Joachim Weber · Frankfurt am Main, DE

Key dates

Filing date	May 27, 2003
Grant date	Aug 28, 2007
Priority date	—
Expiry date	Apr 26, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B33/153
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method for the production of a diazo pigment, or a mixture of diazo pigments, according to formula (I) of the specification by azo coupling, wherein the azo coupling product is subjected to a finish in an organic solvent or in an agueous organic solvent with a neutral or alkaline pH.

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