Aqueous ink composition
US5462592A · kind A · utility
39Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Jun 7, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous ink composition contains a water-soluble dye composed of an anionic dye component and a cationic dye counter-ion; and an anionic additive composed of an anionic additive component and a cationic additive counter ion. The cationic additive counter ion may be one of a lithium cation, a quaternary ammonium cation or a quaternary phosphonium cation, with the amount of the anionic additive being 0.2 wt. % or more of the total weight of the aqueous ink composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.