Claims
- 1. A process for coloration of a substrate comprising printing an ink onto the substrate using a thermal ink jet printer, characterised in that the ink comprises water and a water-dissipatable polyester dyed using a disperse dye or solvent soluble dye.
- 2. A process according to claim 1 wherein the polyester bears ionised carboxy and/or sulphonate groups.
- 3. A process according to claim 1 or 2 wherein the polyester bears ionised sulphonate groups.
- 4. A process according to claim 1 or 2 wherein the polyester has hydrophilic non-ionic segments.
- 5. A process according to claim 4 wherein the hydrophilic non-ionic segments are polyethylene oxide chains.
- 6. A process according to claim 1 or 2 wherein the polyester has an ionised sulphonate group content of from 7.5 to 100 milliequivalents per 100 g of polyester.
- 7. A process according to claim 1 or 2 wherein the polyester has a Mn of below 2500.
- 8. A process according to claim 1 or 2 wherein the ink contains 1 to 40 parts of the dyed water-dissipatable polyester per 100 parts of water.
- 9. A process according to claim 1 or 2 wherein the ink contains an alkylene glycol.
- 10. A process for preparing a dyed water dissipatable polyester comprising dissolving a disperse dye or solvent soluble dye and a water dissipatable polyester in an organic solvent and removing the solvent by evaporation.
- 11. A process according to claim 10 which is carried out in the presence of a glycol or non-ionic surfactant.
- 12. An ink comprising a water-dissipatable polyester having an Mn of below 2,500 bearing ionized sulphonate groups dyed using a disperse dye or solvent dye and an aqueous medium.
- 13. An ink according to claim 12 which further comprises a water-soluble organic liquid.
- 14. An ink according to claim 12 or 13 wherein the water-dissipatable polyester has hydrophilic non-ionic segments.
- 15. An ink according to claim 12 or 13 wherein the ionized sulphonate group content is within the range from 7.5 to 100 milliequivalents per 100 g polyester.
- 16. An ink according to claim 12 or 13 which contains an alkylene glycol.
- 17. An ink according to claim 12 or 13 wherein the Tg of the polyester is in the range 20 to 105.degree. C.
- 18. An ink according to claim 12 or 13 wherein the polyester has a hydroxyl number within the range from 20 to 300 mgKOH/g.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9516371 |
Aug 1995 |
GBX |
|
Parent Case Info
This application is the national phase of international application PCT/GB96/01777 filed Jul. 24, 1996 which designated the U.S.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/GB96/01777 |
7/24/1996 |
|
|
2/10/1998 |
2/10/1998 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/06217 |
2/20/1997 |
|
|
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5292855 |
Krutak et al. |
Mar 1994 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
3013209 |
Jun 1980 |
DEX |
63-182384 |
Jul 1988 |
JPX |