Positively charged developer compositions containing quaternized vinyl pyridine polymers
US4397935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1982 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Jan 18, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is directed to a developer composition comprised of resin particles, pigment particles, carrier particles, and a charge enhancing additive of the following formula ##STR1## wherein R is an alkyl radical containing from about 1 carbon atom to about 25 carbon atoms, A is an anion, and x, y and z are numbers representing the weight percent of monomer present, wherein z is equal to about 1 weight percent to about 50 weight percent, and the sum of x plus y is equal to 100 minus z, thus this sum is equal to about 50 weight percent to about 99 weight percent, accordingly, the total sum of x+y+z is equal to about 100 weight percent; which compositions are useful in causing the development of electrostatic latent images in electrostatographic imaging systems wherein the photoresponsive device utilized is charged negatively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.