Patent ID: 6200370
Filing Date: 2001-03-13
Classification: C09D

Abstract:
A jet printing ink containing an azo dye represented by the following formula (I): ##STR12##wherein X.sup.1 is .dbd.N-- or .dbd.CR.sup.4 --; Y.sup.1 is --N.dbd. or --CR.sup.5.dbd.; Z.sup.1 is --S--, --NR.sup.6 -- or --N.dbd.CR.sup.7 -- in which the right end of each group connects to Y.sup.1 ; the benzene ring A can have one or more substituents; each of R.sup.1, R.sup.2 and R.sup.6 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, or an aryl group, said group possibly having one or more substituens; each of R.sup.3, R.sup.4, R.sup.5 and R.sup.7 independently represents a hydrogen atom, a halogen atom, cyano, hydroxyl, nitro, carboxyl, sulfo, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group, an alkylthio group, an acyl group, an acyloxy group, an alkoxycarbonyl group, an alkylamino group, an arylamino group, or an alkylsufonyl group; or a set of R.sup.1 and R.sup.2, R.sup.1 and the substituent of the benzene ring A, R.sup.2 and the substituent of the benzene ring A, R.sup.3 and R.sup.4, R.sup.4 and R.sup.5, or R.sup.5 and R.sup.6 can be combined to form a heterocyclic or aromatic ring which can have one or more substituents; and at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, the substituent of the benzene ring A, and the substituent of the formed heterocyclic or aromatic ring has at least one carboxyl or sulfo group.