Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1979-07-11
1981-06-23
Martin, Jr., Roland E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 94, 430135, G03G 5087, G03G 509
Patent
active
042751357
ABSTRACT:
A photoconductive insulating layer for an electrophotographic sensitive member formed of a fine powder of CdS.nCdCO.sub.3, wherein 0<n.ltoreq.4, bonded by an insulating resin and having manganese stearate dispersed therein. Advantageously the CdS.nCdCO.sub.3 contains copper as an acceptor impurity in an amount of between about 0.025 and 0.1 grain atomic weight of copper per 100 gram atomic weight of cadmium, the manganese stearate is present in an amount of about 2 to 4 parts by weight per 100 parts by weight of CdS.nCdCO.sub.3 and is preferably adherent thereto, the layer is between 10 and 100 microns thick and the CdS.nCdCO.sub.3 particle size is about 1 to 2 microns or less. In producing the layer the CdS.nCdCO.sub.3 (Cu) is produced by reacting Cd, Cu and CO.sub.3 compounds in an aqueous solution, reacting the resulting precipitate with a sulfide, grinding and calcining the reaction product, then dispersing the calcined powder with the manganese stearate applied thereto or together therewith and the resin in a solvent and spray coating the dispersion in a conductive substrate and then heat treating to harden the resin. Additionally, the electrophotographic sensitive member preferably comprises an insulating protective layer on the photoconductive insulating layer to prevent the cause for filming phenomenon.
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Martin Jr. Roland E.
Minolta Camera Kabushiki Kaisha
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