Liquid electrophotographic ink with a charge director system
US8440381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2008 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Mar 31, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/135
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present disclosure is drawn to compositions and methods for a liquid electrophotographic ink printing. The composition comprises a liquid vehicle; ink particles; and a charge director system, comprising i) a primary charge component, ii) a secondary charge component, and iii) an electrical stability additive; such that the charge director system provides the following ink conductivities: a high field conductivity of about 100 pS/cm to about 500 pS/cm, a low field conductivity of about 20 pS/cm to about 200 pS/cm, a direct charge conductivity less than about 30 pS/cm, and a particle conductivity of at least 100 pS/cm. Additionally, the liquid electrophotographic ink can be formulated for printing from a liquid electrophotographic printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.