Negatively charged colored toner compositions
US4837101A · kind A · utility
10Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Feb 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1139
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A negatively charged developer composition comprised of a toner composition with an average particle diameter of from about 4 to about 9 microns containing a mixture of styrene butadiene copolymers, and styrene methacrylate copolymers; pigment particles selected from the group consisting of cyan, magenta, yellow, red, blue, green, brown, and mixtures thereof; first external additive particles of colloidal silica; second external additive particles of fatty acid metal salts; and carrier particles comprised of a ferrite core with a polymeric coating thereover, which coating has dispersed therein conductive particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.