Cadmium sulfide-type photoconductor with an isocyanate film
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsNoriyoshi Tarumi, Akihiko Tamura, Masakazu Kokiso
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Abstract
A photoconductive material of a fine crystal of a cadmium sulfide-type photoconductive compound, on the surface of the crystal a film-forming compound having a dehydrating function such as an isocyanate compound is deposited. The photoconductive material is employed for forming an electrophotographic material or a photo-cell.
Claims6
A photoconductive powder which consists essentially of particles of a fine crystal of a cadmium sulfide-type photoconductive material and a thin film deposited on the outer surfaces of said particles, said film being of an isocyanate compound having film-forming and dehydrating functions selected from the group consisting of diphenylmethane-4,4'-diisocyanate, polyisocyanate, reaction product between toluidine isocyanate and trimethylol propane, tolylene diisocyanate, 3,3'-dimethyl-diphenyl-4,4'-diisocyanate, 3,3'-dimethyl-diphenylmethane-4,4'-diisocyanate, m-phenylene diisocyanate, tri-phenyl-methanetriisocyanate, 2,4-tolylene-diisocyanate, hexamethylene diisocyanate, naphthylene-1,5-diisocyanate, and 1-isocyanate-6-N,N-dicarboxyhexamethylene-diisocyanate-n-hexane.
A photosensitive material for electrophotography comprising on a conductive support a photoconductive layer comprising photoconductive powders dispersed in a binder resin, which powder consists essentially of particles of a fine crystal of a cadmium sulfide-type photoconductive material selected from the group consisting of cadmium sulfide, cadmium selenide, cadmium sulfide selenide, zinc sulfide and zinc selenide and a thin film deposited on the outer surfaces of said particles at a thickness of not greater than 2 microns, said film being of an isocyanate compound having film-forming and dehydrating functions selected from the group consisting of diphenylmethane-4,4'-diisocyanate, polyisocyanate, reaction product between toluidine isocyanate and trimethylol propane, tolylene diisocyanate, 3,3'-dimethyl-diphenyl-4,4'-diisocyanate, 3,3'-dimethyl-diphenylmethane-4,4'-diisocyanate, m-phenylene diisocyanate, tri-phenyl-methanetriisocyanate, 2,4-tolylene-diisocyanate, hexamethylene diisocyanate, naphthylene-1,5-diisocyanate, and 1-isocyanate-6-N,N-dicarboxyhexamethylene-diisocyanate-n-hexane.
Dependencies are inferred from the claim text.