Isatin-derived dispersed dyes

Details Isatin-derived dispersed dyes Isatin-derived dispersed dyes

1979-01-29

1980-04-15

Trousof, Natalie

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

8179, C07D40306

Patent

active

041985168

ABSTRACT:
The present invention concerns a class of compounds useful as dispersed dyes and insoluble in water, having the general formula (I): ##STR1## wherein the symbols have the following meaning: R is selected from the group consisting of an alkyl group having up to 5 carbon atoms, a group --CH.sub.2 --COOX, wherein X stands for an alkyl group having up to 4 carbon atoms; a group ##STR2## and a group --CH.sub.2 --CH.sub.2 --CN; R.sub.1 represents an H atom, a halogen atom (preferably Cl or Br) and an NO.sub.2 group.
The dyes of this invention, are particularly suited for the dyeing and printing of synthetic fibres, in particular of polyester fibres.
The shades vary from yellow-green to orange. They possess an excellent affinity as well as an excellent fastness to light both in the deep tones as well as in the bright tones.
Good fastnesses are also found against sublimation, to solvents and to washing.

REFERENCES:
patent: 3646033 (1972-02-01), Leister et al.
patent: 4002635 (1977-02-01), Frey
L'Eplattenier et al., Helv. Chim. Acta, 1977, vol. 60, pp. 697-709.
Rappoport, The Chemistry of the Cyano Group, pp. 105-106, N.Y., Interscience-Wiley, 1970.

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