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AssigneeMitsubishi Kasei Corporation
InventorsRyoko Aso, Michio Kawai, Osamu Murakami, Mamoru Nozomi, Ryuji Nakayama, Tadashi Umehara
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A novel electrophotographic photoreceptor and a method of preparation therof are disclosed. The photoreceptor is characterized in that the photosensitive layer contain a specific carbonate resin binder resin having a weight average molecular weight on not less than 200,000. The resin is preferably a polycarbonate resin which contains repeating units represented by the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are respectively and independently a hydrogen atom, a lower alkyl group, a halogen atom or an unsubstituted or substituted aromatic group; and R.sup.9 and R.sup.10 are respectively and independently a hydrogen atom, a lower alkyl group, an unsubstituted or substituted aromatic group, or form a ring or a carbonyl group together with the linking carbon atom. The method is characterized in that the photosensitive layer contains a polyocarbonate having a weight average molecular weight of not less than 200,000 as a binder resin and is formed by spray coating or spiral coating.
An electrophotographic photoreceptor comprising an electroconductive support and a photosensitive layer containing a photoconductive material and a binder resin, wherein said binder resin is a polycarbonate resin having a weight average molecular weight of not less than 200,000.
In the method of preparation of a photoreceptor which comprises an electroconductive support and a photosensitive layer containing a photoconductive material and a binder resin, a method which is characterized in that the photosensitive layer contains a polycarbonate having a weight average molecular weight of not less than 200,000 as a binder resin and is formed by spray coating or spiral coating.
Dependencies are inferred from the claim text.