Electrophotographic imaging member with a copolymer blocking layer
US4933246A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Jan 3, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic imaging member comprising a supporting substrate having an electrically conductive surface, a polymeric blocking layer and at least one photoconductive layer, the polymeric blocking layer having a surface resistivity greater than about 10.sup.10 ohm/sq between the supporting substrate and the photoconductive layer, the blocking layer comprising the heat dried product of a coating mixture comprising a film forming acid, metal salt, or ester copolymer comprising a backbone chain of repeating hydrocarbon units and acidic or acid derivative groups as pendant side chains chemically bonded to the backbone chain, the acidic groups selected from the group consisting of sulfonic acids, carboxylic acids, phosphonic acids and acid anhydrides, and silica gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.