Patent · US Expired

Process for the production of cyanine dyes

US6008350A · kind A · utility

14Cited by

1References

36Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Peter Roschger · Ludwigshafen, DE
Stephan Michaelis · Leverkusen, DE
Karin Hassenruck · Mülheim an der Ruhr, DE
Horst Berneth · Leverkusen, DE
Paul Callant · Edegem, BE

Key dates

Filing date	Mar 13, 1996
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Mar 13, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/146
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to a process for the production of cyanine dyes with their methine chain showing group (M) and the charge compensation occuring by linked end groups through transformation of cationic cyanine dyes comprising group (D) with CH-acid compounds of the following formula (I) B.sub.1 --CH.sub.2 --B.sub.2 in an inert solvent, the substituents having the significance given in the description. ##STR1##

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