Cationic thiadiazole dyestuffs
AssigneeBayer Aktiengesellschaft
InventorsHorst Berneth, Uwe Claussen, Werner Hartwich, Peter Wild
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Abstract
Cationic 1,3,4-thiadiazole dyestuffs of the formula ##STR1## in which the symbols used have the meaning given in the description, corresponding anhydrobases, processes for the preparation of the cationic 1,3,4-thiadiazole dyestuffs, their use for dyeing and printing various materials and as dichroic dyestuffs in polarizing films, and various materials which comprise such dyestuffs.
Claims11
A cationic 1,3,4-thiadiazole dyestuff of the formula ##STR42## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl or a heterocyclic radical which is optionally bonded via a methylene or ethylene bridge,
- and wherein R.sup.1 and R.sup.2, together with the nitrogen atom in between, can also form a heterocyclic radical,
- R.sup.3 represents alkyl, alkenyl, cycloalkyl or aralkyl,
- R.sup.4 and R.sup.5 independently of one another represent hydrogen, alkyl, alkoxy or halogen,
- R.sup.6 represents hydrogen, alkyl, alkoxy, aryloxy, arylamino, alkanoylamino, aroylamino, alkanesulphonamino, alkoxycarbonylamino, alkylaminocarbonylamino, halogen, cyano, alkoxycarbonyl or nitro
- or
- R.sup.5 and R.sup.6 form a --CH.dbd.CH--CH.dbd.CH-- bridge,
- R.sup.7 represents hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl or aryl,
- R.sup.8 and R.sup.9 independently of one another represent hydrogen, alkyl, alkoxy or halogen,
- Z denotes a bivalent bridge member and
- X.sup..crclbar. denotes an anion,
- and wherein all the alkyl, alkenyl, cycloalkyl, aralkyl, aryl, alkoxy and heterocyclic radicals mentioned can be optionally substituted by non-ionic substituents, carboxyl groups, ammonium groups and/or pyridinium groups.
Dependencies are inferred from the claim text.