Electrographic toner and developer composition containing quaternary ammonium salt charge-control agent
US4684596A · kind A · utility
57Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09741
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to the use of quaternary ammonium salt as a charge-control agent for electrostatic toner contained in a dry developer composition. The dry, particulate, electrostatic toner composition of the present invention comprises PA0 (a) a polymeric binder and PA0 (b) a charge-control agent comprising an N-benzyl quaternary ammonium salt, wherein the benzyl ring contains at least one substituent with a Hammett substituent constant that is greater than zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.