Ink compositions containing azo dyes for ink jet printing
US5721344A · kind A · utility
18Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Jul 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B43/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is described novel azo dyes of formula (4) with high water solubility for use in aqueous inks, particularly for ink jet recording, which provide images having high water, smudge and light resistance ##STR1## wherein n, m are each independently 2 to 6; PA1 R is hydrogen or an aliphatic radical having from 1 to 6 atoms; PA1 M is hydrogen, a metal atom, preferentially an alkali metal, an ammonium or ammonium substituted with alkyl, alkoxyalkyl or hydroxyalkyl each having 1 to 12 C atoms PA1 and PA1 F represents a mono-azo or a poly-azo dye residue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.