Process for making pigmented ink jet inks
US5026427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2101/35
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In accordance with this invention there is provided a process for the preparation of pigmented ink jet inks comprising: PA0 (a) mixing at least one pigment and at least one pigment dispersant in a dispersant medium to form a pigmented ink mixture wherein pigment is present in an amount up to 60% by weight based on the total weight of the mixture; PA0 (b) deflocculating the pigmented ink mixture by passing the pigmented ink mixture through at least a plurality of nozzles within a liquid jet interaction chamber at a liquid pressure of at least 1,000 psi to produce a substantially uniform dispersion of pigment particles in the dispersant medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.