Trisazo dyes for ink jet printing

1. A process for printing an image on a substrate comprising applying thereto a composition by means of an ink jet printer wherein said composition comprises a liquid medium and a compound of Formula (1) or salt thereof:

wherein:

A is optionally substituted phenyl or naphthyl provided A is not 2-sulpho-4-methoxyphenyl;

B is optionally substituted phenylene or naphthylene;

n is 0 or 1;

D is a pyrazolonyl group; and

wherein the liquid medium comprises an organic solvent.

2. A process according to claim 1 wherein substituents on A in Formula (1) are selected from the group consisting of hydroxy, halo, nitro, cyano, carboxy, sulpho, phosphato, optionally substituted amino, optionally substituted acylamino, optionally substituted ureido, optionally substituted C 1-6 -alkyl, optionally substituted C 1-6 -alkoxy, optionally substituted C 1-10 -alkylthio, optionally substituted aryl, optionally substituted C 1-6 -alkyl sulphonyl and optionally substituted sulphonamido.

3. A process according to claim 2 wherein substituents on A in Formula (1) are selected the group consisting of from hydroxy, halo, nitro, cyano, carboxy, sulpho, phosphato, optionally substituted amino, optionally substituted acylamino, optionally substituted ureido, optionally substituted C 1-6 -alkyl, optionally substituted C 1-10 -alkylthio, optionally substituted aryl, optionally substituted C 1-6 -alkyl sulphonyl and optionally substituted sulphonamido.

4. A process according to claim 3 wherein A in Formula (1) is selected from the group consisting of 3,5-dicarboxyphenyl, 4-sulphophenyl, 4-carboxyphenyl, 4-sulpho-2-carboxyphenyl, 4-nitro-2-methylphenyl, 4-amino-2-sulphophenyl, 2-sulpho-4-acetamidophenyl, 2-carboxy-4-acetamidophenyl, 6-sulphonaphth-1 -ylene and 7-sulphonaphth-1-ylene.

5. A process according to claim 1 wherein D is a pyrazolonyl group carrying at least one carboxy, sulpho or phosphato group.

6. A process according to claim 1 which contains a further colorant selected from the group consisting of black, magenta and yellow colorants and combinations thereof.

7. A process according to claim 1 wherein:

A is phenyl carrying one or two substituents selected from the group consisting of carboxy, sulpho, amino, methyl, methoxy and acetamido, provided A is not 2-sulpho-4-methoxyphenyl;

B is phenylene or naphthylene carrying one or two substituents selected from the group consisting of sulpho, methyl, methoxy and 2-hydroxyethoxy;

n is 0 or 1;

D is of Formula (2a) or (2b);

R 1 is H, methyl or carboxy; and

R 2 and R 3 are each independently phenyl or phenyl carrying one or two substituents selected from the group consisting of sulpho and carboxy.

8. A process according to claim 1 , with the proviso that A is free from nitro groups when A is optionally substituted phenyl.

9. A process according to claim 8 wherein

A is phenyl carrying one or two substituents selected from the group consisting of carboxy, sulpho, amino, methyl, methoxy and acetamido, provided A is not 2-sulpho-4-methoxyphenyl;

B is phenylene or naphthylene carrying one or two substituents selected from the group consisting of sulpho, methyl, methoxy and 2-hydroxyethoxy;

n is 0 or 1;

D is of Formula (2a) or (2b)

R 1 is H, methyl or carboxy; and

R 2 and R 3 are each independently phenyl or phenyl carrying one or two substituents selected from the group consisting of sulpho and carboxy.

10. An ink jet printer cartridge, optionally refillable, comprising one or more chambers and a composition, wherein the composition is present in at least one of the chambers and the composition comprises a liquid medium and a compound of Formula (1) or salt thereof:

wherein:

A is optionally substituted phenyl or naphthyl provided A is not 2-sulpho-4-methoxyphenyl;

B is optionally substituted phenylene or naphthylene;

n is 0 or 1;

D is a pyrazolonyl group; and

wherein the liquid medium comprises an organic solvent.

11. A paper, an overhead projector slide or a textile material printed by a process according to claim 1 .