Carrier composition
US7419755B2 · kind B2 · utility
1Cited by
36References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Aug 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1137
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Carrier particles comprise a core and a polymer coating that comprises a mixture of polymethyl methacrlyate (PMMA) and melamine. The coating compositions comprise from about 60 to about 80 percent by weight of PMMA and from about 20 to about 40 percent by weight of melamine. The carriers may be combined with a toner to provide a developer suitable for use in an electrostatographic process. Carriers comprising the PMMA/melamine coatings exhibit increased triboelectric charging, a more conductive carrier, and also contribute to reducing toner cohesion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.