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US 3,959,250 AGranted
Bisazo dyestuffs of the 2,6-diaminopyridine
AssigneeCassella Farbwerke Mainkur Aktiengesellschaft
InventorsErnst Heinrich, Konrad Mix, Joachim Ribka
Life of this patent
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Abstract
Bisazo dyestuffs of the 2,6-diaminopyridine series, wherein the azo moieties are interconnected by an aromatic moiety preparation thereof and their utility in textile printing lacquers, printing dyes and in bulk dyeing of synthetics.
Claims13
A bisazo dyestuff of the formula
- Q -- N = N -- A -- N = N -- Q.sub.1
- wherein each of Q and Q.sub.1 is a radical of the formula ##SPC30##
- A is a radical of the formulae ##SPC31##
- R.sub.1 is alkyl having 1 to 3 carbon atoms;
- R.sub.2 is cyano or --CONH.sub.2 ;
- each of R.sub.3 and R.sub.5 is hydrogen, methyl, --C.sub.2 H.sub.4 OH, --CH.sub.2 CH(OH)CH.sub.3, --CH.sub.2 CH.sub.2 CH.sub.2 OH, --C.sub.2 H.sub.4 CONH.sub.2, benzyl, phenethyl, cyclopentyl, cyclohexyl or ##SPC32##
- each of R.sub.4 and R.sub.6 is hydrogen, alkyl having 1 to 3 carbon atoms, --C.sub.2 H.sub.4 OH, --CH.sub.2 CH(OH)CH.sub.3 --C.sub.2 H.sub.4 CN or --CH.sub.2 CH.sub.2 CH.sub.2 OH;
- R.sub.7 is hydrogen, methyl, methoxy, --NHCOCH.sub.3 or --NHCOC.sub.6 H.sub.5 ;
- m is 0, 1, 2 or 3;
- each of R.sub.8 and R.sub.9 is hydrogen, halogen, nitro, methyl or methoxy;
- X is --O--, --S--, ##EQU3## or --SO.sub.2 -- and X.sub.1 is --O--, --S-- or --NH--.
8 more elements
The bisazo dyestuff having the formula ##SPC41##
- wherein each of R.sub.3 and R.sub.5 is hydrogen, methyl, ethyl, --C.sub.2 H.sub.4 OH, --C.sub.6 H.sub.5 or ##SPC42##
- A is a radical of the formula ##SPC43##
- each of R.sub.8 and R.sub.9 is hydrogen, halogen, nitro, methyl or methoxy;
- X is --O--, --S--, ##EQU4## or --SO.sub.2 --.
1 more element
The bisazo dyestuff having the formula ##SPC44##
- wherein each of R.sub.3 and R.sub.5 is hydrogen, methyl, ethyl, --C.sub.2 H.sub.4 OH, --C.sub.6 H.sub.5 or ##SPC45##
- A is a radical of the formula ##SPC46##
Dependencies are inferred from the claim text.