Aqueous ink
US7192475B2 · kind B2 · utility
5Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous ink comprising at least two dyes each having at least one ionic hydrophilic group in a molecule thereof, wherein at least one of said at least two dyes includes an azo dye represented by formula (1):wherein A and B each independently represents a substituted or unsubstituted monovalent aromatic group; or a substituted or unsubstituted monovalent heterocyclic group; R1 represents a hydrogen atom; a substituted or unsubstituted aromatic group; or a substituted or unsubstituted heterocyclic group; and X represents —CR2═ or a nitrogen atom, and when X represents —CR2═, R2 represents a hydrogen atom or a substituent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.