Derivatization of dyes/pigments with crown ethers and inkjet printing fluids containing the same
US6558459B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Aug 5, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An inkjet ink is provided that employs one or more water-soluble colorants or water-insoluble colorants, such as solvent dyes, disperse dyes, or pigments. The colorant, whether water-soluble or water-insoluble, is derivatized with one or more crown ethers to render the water-insoluble colorants soluble in water and in water-miscible organic solvents commonly employed in inkjet printing, particularly thermal inkjet printing, and to impart improved properties to the colorants, such as lightfastness, smearfastness, and waterfastness. The inkjet ink comprises a vehicle and at least one crown ether derivatized colorant. The resulting inkjet ink evidences improved print quality properties, compared to inkjet inks containing colorants that are not so derivatized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.