Liquid electrophotographic ink composition
US9823597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Jul 29, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/135
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin; suspending in the carrier fluid white pigment particles to be coated; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the pigment particles; reheating the suspension of partially coated white pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the pigment particles, thereby producing the white liquid electrophotographic ink composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.