Negatively chargeable toner for developing latent electrostatic images
US5168028A · kind A · utility
28Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09766
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A negatively chargeable toner for developing latent electrostatic images comprising a binder resin, a coloring agent and a charge controlling agent which comprises a fluorine-containing quaternary ammonium salt of formula (I): ##STR1## wherein X represents --SO.sub.2 or --CO; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms or an aryl group; m is an integer of 1 to 5; and n is an integer of 1 to 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.