Reactive trisazo dyes

Details Reactive trisazo dyes Reactive trisazo dyes

2005-03-08

2005-03-08

Powers, Fiona T. (Department: 1626)

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

Organic compounds

Azo

C534S634000, C008S547000, C008S549000

Reexamination Certificate

active

06864360

ABSTRACT:
The present invention refers to trisazo dyes of the formula Ior an alkali metal salt thereof; wherein:Ar1is an optionally substituted arylene group;Ar2is an optionally substituted aryl group;R1, R2, R3, R4, X1and X2are defined as given in claim 1;each of D1and D2, independently, is a chromophore group of the formula wherein the variables are defined as given in claim 1,a process for their preparation and a process for colouring fibre material containing a group reactive with a reactive dye.

REFERENCES:
patent: 3647778 (1972-03-01), Andrew et al.
patent: 6180765 (2001-01-01), Ebenezer
patent: 6372893 (2002-04-01), Nusser
patent: 1 283 771 (1972-08-01), None
patent: WO 9905223 (1999-02-01), None

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