Pigment-dispersed ink-jet ink, ink set, ink tank, recording unit, ink-jet recording apparatus, ink-jet recording process and production process of pigment-dispersed ink-jet ink
US7378459B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2004 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Jul 12, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a pigment-dispersed ink-jet ink comprising a pigment and a resinous dispersing agent, wherein the resinous dispersing agent is a vinyl copolymer having an acid value of 50 mg KOH/g or higher and a solubility of at most 3% by mass in an alkaline solution containing KOH in an amount 1.5 times as much as the acid value, and the viscosity characteristic of the ink as measured by means of a viscoelastometer satisfies the following relationship:1.1≦(Viscosity of an ink as measured under conditions of 20° C. and a shear rate of 0.5 sec−1)/(Viscosity of an ink as measured under conditions of 20° C. and a shear rate of 100 sec−1)≦2.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.