Solvent azo dyes having carboxylic acid functions

Details Solvent azo dyes having carboxylic acid functions Solvent azo dyes having carboxylic acid functions

1987-10-02

1990-10-23

Higel, Floyd D.

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

Organic compounds

Azo

534573, 534756, 534764, 534771, 534774, 534789, 534792, 534829, 534832, C09B 2901, C09B 2940, C09B 31053, C09B 31068

Patent

active

049653458

ABSTRACT:
Solvent dyes of the formula ##STR1## where ##STR2## R.sup.1 and R.sup.2 are each, independently of the other, hydrogen, methyl, ethyl, methoxy or ethoxy,
n is 0 or 1 and
k, if n is 0, is the radical of a coupling component of the pyrazolone series or, if n is 1, is the radical of a coupling component of the pyrazolone, 2-naphthol, hydroxyquinoline, aniline, naphthylamine, pyridone or 2,6-diaminopyridine series,
R.sup.3 and R.sup.4 each independently of the other being C.sub.1 -C.sub.22 -alkyl which may be substituted or interrupted by oxygen, imino or C.sub.1 -C.sub.4 -alkylimino, subject to the proviso that COR has more than 8 carbon atoms, are very highly suitable for coloring organic substrates.

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