Toner compositions containing colored silica particles
US5102763A · kind A · utility
28Cited by
15References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Mar 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0926
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a dry toner composition which comprises a resin, hydrophilic silica particles having dyes covalently bonded to the particle surfaces through silane coupling agents, and a polymer having at least one segment capable of enhancing the dispersability of the silica particles in the resin and at least one segment capable of adsorbing onto the surface of the silica particles. In one embodiment, the polymer segment capable of adsorbing onto the surface of the silica particles is ionophoric and capable of complexing with a salt, thereby incorporating a toner charge control additive into the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.