Persistent photoconductive element comprising pigment layer...

Details Persistent photoconductive element comprising pigment layer... Persistent photoconductive element comprising pigment layer...

G - Physics

03

G

96/187

G03G 5/024 (2006.01) G03G 5/06 (2006.01)

Patent

CA 1176905

ABSTRACT OF THE DISCLOSURE 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 hydro- carbons, halogenated acyl compounds, halogenated keto com- pounds and hydrogen donor compounds. This element exhibits an improved photoconductive sensitivity and prolonged photoconducitivity 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.

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