Water soluble colorants for ink jet printing
US7153350B2 · kind B2 · utility
3Cited by
13References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In accordance with one embodiment of the present invention, a colorant in an ink jet ink formulation is disclosed. The colorant comprises an organic dye chromophore with at least one functional group Y containing one or more primary, secondary or tertiary amino groups, which in the presence of an acid provides a water soluble, cationic ink jet ink colorant with increased water fastness when applied to paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.