Method of manufacturing water base disperse ink for ink-jet recording
US6074466A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The method of manufacturing the water base disperse ink for jet-ink recording according to the invention comprises a series of steps (1) through (4), that is, (1) a step of purifying by washing pressed cakes composed of a water insoluble or slow soluble colorant; (2) a step of preparing a dispersion liquid with the colorant in high concentration by mixing the colorant obtained through purification by washing, and various additives for ink, as necessary, with an aqueous solution of the dispersant obtained by dissolving the water soluble dispersant in the water base dispersive vehicle; (3) a step of preparing separately a diluent composed of constituents of the dispersion liquid with the colorant in high concentration, excluding the colorant, and preparing an ink-like disperse liquid through dispersion after mixing the diluent with the dispersion liquid with the colorant in high concentration; and (4) a step of obtaining the water base disperse ink, in an evenly dispersed and stable condition, by subjecting the ink-like disperse liquid to ultrasonic irradiation treatment such that secondary aggregations of particles of the colorant contained in the ink-like disperse liquid are reduce…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.