Waterfast dye and aqueous ink
US5198022A · kind A · utility
25Cited by
25References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jan 17, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B31/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains black on acid papers. The aqueous inks are stable and exhibit good printhead nozzle maintenance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.