Quaternized azo dyestuffs
AssigneeImperial Chemical Industries PLC
InventorBrian Parton
Life of this patent
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Abstract
Azo dyestuffs devoid of carboxylic acid and sulphonic acid groups and of the formula I: ##STR1## wherein A.sym. is a positively-charged aromatic or heterocyclic group, X.crclbar. is an anion; R is hydrogen or an optionally-substituted alkyl, aryl, aralkyl or cycloalkyl group, R.sup.1 is hydrogen, or an optionally-substituted alkyl or aralkyl group and the quinoline ring may be further substituted, and processes for the manufacture of such dyestuffs which are useful for the coloration of synthetic polymeric materials such as acrylonitrile polymers and copolymers.
Claims2
Azo dyestuff of the formula:
- ##STR16## wherein X is an anion, R is an alkyl group of from 1 to 6 carbon atoms and R.sup.1 is hydrogen, R.sup.4 and R.sup.5 are optionally substituted alkyl or aralkyl radicals and R.sup.6 is hydrogen or optionally substituted aryl, alkyl or aralkyl group.
An azo dyestuff of the formula:
- ##STR17## wherein X is an anion, R.sup.1 is hydrogen, R is alkyl of from 1 to 6 carbon atoms, R.sup.4 and R.sup.5 are selected from the group consisting of methyl, ethyl, propyl, butyl, 2-chloroethyl, 2-bromoethyl, 2-acetoxyethyl, allyl, benzyl, cyclohexyl, 2-phenylethyl, 2-carbamoylethyl, 2-carbamoyl-2-methylethyl, methoxyethyl, methylcarbonylethyl, 2-hydroxyethyl and 2-cyanoethyl and R.sup.6 is selected from the group consisting of hydrogen, methyl, ethyl, benzyl, phenyl, p-nitrophenyl, m-tolyl, cyclohexyl, p-chlorophenyl, p-methoxyphenyl, methylthio, methoxy, methoxycarbonyl and aminocarbonyl.
Dependencies are inferred from the claim text.