Layered persistent photoconductive element comprises pigment lay

Details Layered persistent photoconductive element comprises pigment lay Layered persistent photoconductive element comprises pigment lay

1982-12-03

1984-04-24

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 51, 430 76, G03G 5024, G03G 507

Patent

active

044448600

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.

REFERENCES:
patent: 3113022 (1963-12-01), Cassiers et al.
patent: 3512966 (1970-05-01), Shattuck et al.
patent: 3879201 (1975-04-01), Williams et al.
patent: 3997342 (1976-12-01), Bailey
patent: 4033769 (1977-07-01), Williams et al.
"Persistent Conductivity in Organic Photoconductors", Tappi, 56 No. 6, pp. 129-133 (1973) by D. J. Williams et al.

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