Organic photoconductive material for electrophotography and method for making the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAtsushi Omote, Sohji Tsuchiya, Mutsuaki Murakami
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Abstract
A method for making photosensitive materials of the positive charge type which are useful in electrophotography is described. In the method, X-type and/or .tau.-type phthalocyanine is at least partially dissolved in a solvent along with a resin binder or in a solution of the resin binder by which good photosensitive characteristics are obtained. The photosensitive material obtained by the method may be of a single-layer or a double-layer type. A photosensitive material having an improved ozone resistance is also disclosed. The material makes use of a resin binder having vinylphenol units therein.
Claims23
A method for making an organic photoconductive material which comprises:
- (a) dissolving at least a part of X-type and/or .tau.-type metal-free phthalocyanine in a solution of a resin binder comprising a vinylphenol polymer in a solvent capable of dissolving at least a part of X-type and/or .tau.-type metal-free phthalocyanine;
- (b) applying the resultant solution onto a conductive support;
- and
- (c) drying the applied mixture to form a photosensitive layer on the conductive support.
An organic photoconductor material for electrophotography which comprises a conductive support, and a photosensitive layer formed on the conductive support, said photosensitive layer being made of a composition which comprises X-type and/or .tau.-type metal-free phthalocyanine dispersed in a resin binder comprising a vinylphenol polymer.
Dependencies are inferred from the claim text.