Ink, ink cartridge, and ink jet recording method
US8616695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2012 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jul 14, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/326
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided is an ink jet ink including a monoazo pigment and a resin, the ink being used for an ink jet recording system in which the ink is ejected from a recording head by an action of thermal energy. The monoazo pigment is a self-dispersible pigment having an anionic group bonded to a particle surface of the pigment directly or via another atomic group and has a surface charge amount of 5.9×10−2 mmol/g or more and 9.8×10−2 mmol/g or less. The resin has an acid value of 100 mg KOH/g or more and 160 mg KOH/g or less. The mass ratio of the content (mass %) of the resin to the content (mass %) of the monoazo pigment in the ink is 0.05 times or more and 0.25 times or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.