Azo dyes prepared using 2-alkylamino-3-cyano-4,6-diaminopyridine

Details Azo dyes prepared using 2-alkylamino-3-cyano-4,6-diaminopyridine Azo dyes prepared using 2-alkylamino-3-cyano-4,6-diaminopyridine

1991-06-24

1993-03-23

Lee, Mary C.

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

Organic compounds

Azo

534770, 546289, C09B 2942, D06P 118

Patent

active

051965216

ABSTRACT:
The dyes of the formula ##STR1## in which R.sub.1 is hydrogen, halogen or CF.sub.3 and R.sub.2 is substituted or unsubstituted alkyl, where R.sub.2 must not be ethoxycarbonylethyl if R.sub.1 is hydrogen are suitable for the dyeing of polyester material in red hues having very good lightfastness.

REFERENCES:
patent: 4066637 (1978-01-01), Ramanathan
patent: 4208324 (1980-06-01), Ramanathan
patent: 4243583 (1981-01-01), Portmann
patent: 4401600 (1983-08-01), Portmann

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