Method of modifying the charging propensity of carrier particles for electrostatographic developers and carrier particles produced thereby
US4726994A · kind A · utility
14Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a method of modifying the triboelectric charging propensity of carrier particles coated with a fluorohydrocarbon polymer. The method comprises dehydrofluorinating and oxidizing the polymer by contacting the coated particles with a basic solution and a solution of an oxidizing agent. The resulting new particles have less fluorine atoms bonded to the coated polymer and also have oxygen atoms bonded thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.