Azo dyes suitable for ink jet printing

Abstract

Anionic azo compounds which, in the free acid form, have the Formula (1): ##STR1## wherein: Ar and Ar.sup.1 are each independently aryl or substituted aryl providing at least one of Ar and Ar.sup.1 has at least one substituent selected from COOH and COSH; J and J.sup.1 are each independently of formula (2), (3) or (4): ##STR2## each R.sup.5 is independently selected from H, alkyl, substituted alkyl, alkoxy, halogen, CN, ureido and NHCOR.sup.6 ; R.sup.6 is H, alkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl; each T is independently alkyl; each W is independently selected from H, CN, CONR.sup.10 R.sup.11, pyridinium and COOH; each m is an alkylene chain having 2 to 8 carbon atoms; B is H, alkyl or COOH; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.10 and R.sup.11 are each independently H, alkyl or substituted alkyl; L is a divalent organic linking group; n is 0 or 1; each X is independently carbonyl or a group of the Formula (5), (6) or (7): ##STR3## Z is OR.sup.7, SR.sup.7 or NR.sup.8 R.sup.9 ; Y is H, Cl, CN or Z; E is Cl or CN; R.sup.7, R.sup.8 and R.sup.9 are independently H, alkenyl, substituted alkenyl, alkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, or R.sup.8 and R.sup.9 together with the nitrogen atom to which they are attached form a 5 or 6 membered ring; provided (i) if the compound of Formula (1) has no --SO.sub.3 H groups then it has at least two groups selected from --COOH and --COSH; and (ii) the compound of Formula (1) has at least as many groups selected from --COOH and --COSH as --SO.sub.3 H groups. The compounds are useful for the preparation of inks for use in ink-jet printing.

Dependencies are inferred from the claim text.