Aqueous ink composition and colorants useful therein
US5176745A · kind A · utility
67Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Dec 11, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous ink composition is provided having up to 50 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.