Carrier particles for use in electrostatic image development and electrostatic image developer
US6040101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1997 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jun 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier particle which includes a core and a coating layer formed on the surface of the core. The coating layer is made of a coating material including: an organic compound (A) having a functional group other than an Si(OR.sup.1) group, where R.sup.1 is a hydrogen atom, a lower alkyl group or an acyl group; a compound (B) and/or a hydrolytic condensation product thereof, having a functional group having reactivity with the functional group of the organic compound (A), and an Si(OR.sup.1) group; an organometallic compound (C) and/or a hydrolytic condensation product thereof; and a solvent (D). The carrier particles of the present invention, enable toner particles to be sufficiently charged even at high temperature and high humidity, so that an image with no fog can be formed. In addition, the carrier particle has high durability. There is no unnecessary attachment of the toner particles onto the carrier particles, so that the problems of carrier particle contamination and spent toner never arise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.