Electrostatographic toner containing yellow pigment
US5292621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/091
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrostatographic toner materials are disclosed which contains a yellow pigment which is a metal coordination complex having the formula: ##STR1## wherein R is preferably hydrogen, or SO.sub.2 NHR.sup.2 (R.sup.2 being alkyl or aryl), Z is an electron withdrawing group, Z.sup.1 is preferably alkyl, aryl or N(R.sup.3).sub.2 (R.sup.3 being alkyl, aryl or hydrogen), Me is a coordinate metal ion and L is a ligand. These pigments are formulated with fusible polymeric binders to provide a toner which exhibits excellent triboelectric properties and improved yellow color and hue when utilized in the electrostatographic process to produce colored electrophotographic images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.