Trisazo dyes, inks comprising same and their use in ink jet printing
AssigneeZeneca Limited
InventorsPeter Gregory, Prahalad M. Mistry
Life of this patent
Estimating the term…
Abstract
A compound of Formula (1) or salt thereof: ##STR1## wherein: R.sup.1 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H or --NR.sup.3 R.sup.4 ; R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H or SO.sub.3 H; R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring; W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH; and Y and Z are each independently --OH or --NR.sup.3 R.sup.4. The compound is suitable for use as a black component of ink jet printing inks.
Claims12
A compound of Formula (1) or salt thereof:
- ##STR6## wherein:
- R.sup.1 is CO.sub.2 H;
- R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H or SO.sub.3 H;
- R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring;
- W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH;
- and
- Y and Z are each independently --OH or --NR.sup.3 R.sup.4.
A compound according to any one of the preceding claims wherein one of Y and Z is --OH and the other is --NR.sup.3 R.sup.4.
A composition containing a first and second compound, each of which is of the Formula (1) or salt thereof:
- ##STR7## wherein:
- R.sup.1 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H or --NR.sup.3 R.sup.4 ;
- R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H;
- R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring;
- W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH;
- and
- Y and Z are each independently --OH or --NR.sup.3 R.sup.4 ;
- and
- wherein the first and second compound are identical in every respect except that in the first compound Y is --NH.sub.2 and Z is --OH and in the second compound Y is --OH and Z is --NH.sub.2.
An ink comprising one or more compounds of Formula (1) or salt thereof:
- ##STR8## wherein:
- R.sup.1 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H or --NR.sup.3 R.sup.4 ;
- R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H;
- R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring;
- W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH;
- and
- Y and Z are each independently --OH or --NR.sup.3 R.sup.4 ;
- and a liquid medium wherein the liquid medium comprises water and a water-soluble organic solvent in a weight-to-weight ratio of 95:1 to 50:50.
A process for printing a substrate with an ink using an ink jet printer, characterised in that the ink contains at least one compound of Formula (1) or salt thereof ##STR9## wherein:
- R.sup.1 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H or --NR.sup.3 R.sup.4 ;
- R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H;
- R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring;
- W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH;
- and
- Y and Z are each independently --OH or --NR.sup.3 R.sup.4 ;
- and which process comprises forming the ink into small droplets by ejection from a reservoir through a small orifice by the application of heat so that the droplets of ink are directed at the substrate.
Dependencies are inferred from the claim text.