Photosensitive material for electrophotography and method for making same
First Claim
1. A process for forming a photosensitive material for electrophotography which comprises:
- preparing a solution of a charge-generating compound and/or a charge transfer compound and a resin binder in an organic solvent wherein the charge-generating compound and/or charge transfer compound, the resin binder and the organic solvent have, respectively, a ring structure in the molecule;
subjecting the solution to low temperature treatment wherein said solution is cooled from normal temperatures to a temperature which does not cause the solutes to be precipitated or the solution to be coagulated, for a time enough to allow interaction between the compound or compounds and the binder and is gradually returned to normal temperatures;
applying the thus treated solution onto an electrically conductive support; and
drying the applied solution to form a photoconductive layer on the support.
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Accused Products
Abstract
A photosensitive material for electrophotography which comprises an electrically conductive support of a desired shape and an organic photoconductive layer formed on the substrate, is provided. The organic photoconductive layer is formed from a solution of an organic charge-generating compound, an organic charge transfer compound and an organic resin in an organic solvent after low temperature treatment thereof wherein the solution is cooled to a temperature sufficient not to cause the solutes to be precipitated or the solution to be coagulated for a time enough to allow interaction between the compounds and the resin binder and is returned to room temperature. This solution is applied to the support and dried to form a photoconductive layer on the support. The photoconductive layer may be of a single-layer structure or a double-layered structure wherein at least one sub-layer should be formed from a solution subjected to the low temperature treatment. A process for making the photosensitive material is also described.
22 Citations
7 Claims
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1. A process for forming a photosensitive material for electrophotography which comprises:
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preparing a solution of a charge-generating compound and/or a charge transfer compound and a resin binder in an organic solvent wherein the charge-generating compound and/or charge transfer compound, the resin binder and the organic solvent have, respectively, a ring structure in the molecule; subjecting the solution to low temperature treatment wherein said solution is cooled from normal temperatures to a temperature which does not cause the solutes to be precipitated or the solution to be coagulated, for a time enough to allow interaction between the compound or compounds and the binder and is gradually returned to normal temperatures; applying the thus treated solution onto an electrically conductive support; and drying the applied solution to form a photoconductive layer on the support. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification