Layered persistent photoconductive element comprises pigment layer and polymer layer containing polyvinyl carbazole
US4444860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1982 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Dec 3, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0664
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A persistent photoconductive element comprising an electroconductive support, a pigment layer formed on said support and composed mainly of a phthalocyanine pigment or Indanthrene Blue GCD and a polymer layer formed on said pigment layer and composed mainly of a polyvinyl carbazole, said polymer layer containing at least one member selected from the group consisting of aliphatic halogenated hydrocarbons, halogenated acyl compounds, halogenated keto compounds and hydrogen donor compounds. This element exhibits an improved photoconductive sensitivity and prolonged photoconductivity over the prior art, whereby it is highly useful in electrophotographic processes requiring persistent photoconductivity. Additives, such as plasticizer and binding agent, may be incorporated in the polymer and pigment layers to improve the flexibility and mechanical durability of the persistent photoconductive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.