Method of preparing fiber-reactive formazan dyes involving hydro

Details Method of preparing fiber-reactive formazan dyes involving hydro Method of preparing fiber-reactive formazan dyes involving hydro

1993-06-11

1995-04-25

Higel, Floyd D.

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

Organic compounds

Azo

534618, 534652, 564218, 564223, C09B 62018, C09B 62038, C09B 4316, C09B 5000

Patent

active

054100275

ABSTRACT:
Fiber-reactive formazan dyes are prepared by diazotizing a protectively formylated hydroxyphenylenediamine, coupling with a hydrazone compound, metallizing, eliminating the protective group, and reacting with a halotriazine and optionally thereafter with an amine or a hydroxy compound via novel aminophenol intermediates.

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patent: 5107022 (1992-04-01), De Besset
patent: 5145483 (1992-09-01), Junino et al.

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