Multi-layered squarylium-based positive charge electrophotograph

Details Multi-layered squarylium-based positive charge electrophotograph Multi-layered squarylium-based positive charge electrophotograph

1988-12-30

1990-08-14

Goodrow, John L.

Radiation imagery chemistry: process, composition, or product th

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

Radiation-sensitive composition or product

430 66, 430 73, G03G 506

Patent

active

049486870

ABSTRACT:
An electrophotographic photoreceptor for use in positive charging electrophotographic machines is disclosed, comprising an electrically conductive substrate having thereon a charge transporting layer, a charge generating layer, and a low resistance surface protective layer, in that order, wherein a squarylium acid derivative having an asymmetrical structure represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 may be the same or different and represent a --CH.sub.3 group or a ##STR2## group (wherein Y represents a halogen atom), and X.sub.1 and X.sub.2 may be the same or different and represent a hydrogen atom, an --OH group or a halogen atom, is dispersed in said charge generating layer.

REFERENCES:
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patent: 4521621 (1985-06-01), Yanus et al.
patent: 4523035 (1985-06-01), Yanus
patent: 4524218 (1985-06-01), Baranyi et al.
patent: 4700001 (1987-10-01), Tanaka et al.
patent: 4752650 (1988-06-01), Tanaka et al.

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