| abstract |
A water-soluble dye, free fom cellulose reactive groups, of the formula:n whereinn R I is -(C a H2 a O) m (C b H 2b O) n H, R 2 is H or -(C a H 2a O) m (C b H 2bO ) n H, or R 1 & R 2 together with the nitrogen atom form a morpholine ring a & b are different and from 1 to 8 m is from 1 to 10; n is from 0 to 9; Y is the residue of a copper phthalocyanine sulphonic acid of the formula:n p is from 1 to 3 q is from 1 to 3 p + q is from 3 to 4 M is H, ammonium, or a monovalent metal; X is NR 1 R 2 , alkoxy, NR 3 R 4 in which R 3 and R 4 are each independently selected from H, alkyl and aryl, or the residue of a mono- or dis-azo chromophore comprising benzene, naphthalene or mono- or bi-cyclic heteroaryl diazo and coupling components, linked to the triazine nucleus through a primary or secondary amine linking group; and Z is a divalent linking group, which is suitable for the preparation of a printing ink, especially for ink jet printing. |