Aqueous ink composition and colorants useful therein
US5310887A · kind A · utility
35Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Dec 1, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
As aqueous ink composition is provided having up to 5 wt. % of a colorant of the formula: EQU A--{Y--X--C(O)--R.sub.1 --C(O)O.sup.- }.sub.p where A is an organic chromophore; Y is a polyoxyalkylene substituent; X is a radical of a reactive hydroxy, amino or thio group; and R.sub.1 is C.sub.2-30, substituted or unsubstituted alkylene, alkenylene, or phenylenealkylene. A counter ion selected from alkaline metal ions, alkaline earth metal ions, ammonium ions, amine salts, and zinc ammonium complexes is present in approximately stoichiometric proportion or greater relative to the colorant in the ink composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.