Aqueous pigment dispersions containing sequestering agents for use as ink jet printing inks
US5611847A · kind A · utility
46Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1994 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Dec 8, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink composition for utilization in ink-jet printing is provided which comprises an aqueous medium, a metallized azo red pigment and, as a sequestering agent, an alkali metal, an alkaline earth metal or an ammonium salt of a linear aliphatic substituted glycine such as a salt of ethylene diamine tetraacetic acid or nitrilo triacetic acid. The composition has been found to remain stable for extended periods of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.