Preparation of quaternized azo dyes

Details Preparation of quaternized azo dyes Preparation of quaternized azo dyes

1992-07-17

1993-11-23

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534604, 534605, 534606, 534607, 534611, 8527, C09B 4300, C09B 4410, D06P 324, D06P 376

Patent

active

052645606

ABSTRACT:
Quaternized azo dyes whose diazo components are derived from a five-membered nitrogen-containing aromatic aminoheterocycle and whose coupling components are derived from the aniline series are prepared by reacting to corresponding neutral dye-bases with an alkylating agent in .gamma.-butyrolactone as inert diluent.

REFERENCES:
patent: 3346322 (1967-10-01), Finkenauer et al.
patent: 3887329 (1975-06-01), Hegar et al.
patent: 3909192 (1975-09-01), Gertisser
patent: 3956271 (1976-05-01), Blass et al.
patent: 3991043 (1976-11-01), Illy
patent: 4392998 (1983-07-01), Kuhlthau
patent: 4997918 (1991-03-01), Zink

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