Water-soluble disazo dyestuffs, prepared from unsymmetrical hete

Details Water-soluble disazo dyestuffs, prepared from unsymmetrical hete Water-soluble disazo dyestuffs, prepared from unsymmetrical hete

1978-01-05

1980-09-30

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260156, 260158, 260160, 8662, C09B 3534

Patent

active

042254922

ABSTRACT:
Water-soluble disazo dyestuffs having the general formula B.sub.1 --N.dbd.N--Z--N.dbd.N--B.sub.2 wherein Z is ##STR1## wherein Y and M are the same or different and are methyl, ethyl, methoxy, ethoxy, and halogen, a and b are 0, 1 or 2, X is ##STR2## --0-- or --S--, R.sub.1 is hydrogen, alkyl having one to 4 carbon atoms, phenyl or benzyl, B.sub.1 is a CH-acid coupling component of the acetoacetic acid arylamide series of the formula ##STR3## wherein R.sub.2 is phenyl, substituted phenyl, naphthyl-1, benzimidazolon-5-yl, substituted benzimidazolon-5-yl, or substituted napthyl-1, naphthyl-2, or substituted naphthyl-2, and B.sub.2 denotes a second coupling component radical wherein B.sub.1 and B.sub.2 are identical or different with the proviso that said disazo compound contains at least one sulpho group or carboxyl group in the dyestuff molecule.

REFERENCES:
patent: 4024125 (1977-05-01), Kunstmann et al.
patent: 4033945 (1977-07-01), Bauer et al.

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