Metallic pigment particles
US11236248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2016 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Mar 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/0517
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for producing a conductive liquid electrophotographic ink composition is described, the method comprising: heating a polymer resin in a carrier fluid to dissolve the polymer resin; adding conductive metallic pigment particles to be coated to the carrier fluid; 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 conductive metallic pigment particles; reheating the suspension of partially coated conductive metallic 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 conductive metallic pigment particles, thereby producing the conductive liquid electrophotographic ink composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.