Method of separating electrophotographic carrier compositions and recycling the compositions
US6464797B1 · kind B1 · utility
3Cited by
2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Nov 5, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1131
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without affecting the properties of the core materials through process steps benign to the environment in super- or sub-critical water compositions under the conditions of a temperature of 300° C. or more and a pressure of 20 MPa. The core magnetic material is subsequently recycled for forming carrier. This method may also be useful for processing waste including magnetic materials with silicone resin coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.