Canon Kabushiki Kaisha

Copyer Co., Ltd.

Copyer Kabushiki Kaisha

Canon Inc.

Other

Copyer Co., Ltd., Canon Inc.

Shozo Ishikawa

Makoto Kitahara

Kazuharu Katagiri

Katsunori Watanabe

Kiyoshi Sakai

Masakazu Matsumoto

Takao Takiguchi

Shoji Umehara

Minoru Mabuchi

Yoshio Takasu

Masataka Yamashita

Shigeto Ohta

Hajime Miyazaki

Naoto Fujimura

Masaaki Hiro

Hideyuki Takahashi

Norie Takebayashi

Tetsuo Arita

Shoji Masubuchi

Toshihiro Kikuchi

Takashi Tanaka

Itaru Yamazaki

Masaki Kuribayashi

Hitoshi Toma

Fumio Sumino

Takeshi Fujita

Wataru Ando

Shigeki Ohkawa

Yuji Egarashi

Toshiko Suzuki

Yuji Egashira

An electrophotographic photosensitive member comprises a photosensitive layer on a conductive support, wherein said photosensitive layer contains a compound, having structures (A) and (B) together in its structural formula and wherein said photosensitive layer contains a thioether compound represented by Formula (VI).

Electrophotographic photosensitive member

A function separated type electrophotographic photosensitive member for infrared rays comprises a combination of a charge generation material and a charge transport material, wherein the electrophotographic photosensitive member for infrared rays contains as the charge generation material a disazo pigment represented by Formula (1).

Function separated photosensitive member having a diphenylamine

The invention provides an electrophotographic photosensitive member having an improved sensitivity and an improved potential stability when repeatedly copied by using a photosensitive layer containing a disazo pigment having a specific molecular structure.

Electrophotographic photosensitive member containing a disazo pigment

An electrophotographic photosensitive member comprises a photosensitive layer on a substrate, said photosensitive layer comprising a disazo pigment represented by the formula (1).

Electrophotographic photosensitive member containing disazo compound

A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.

Photosensitive member for electrophotography

An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.

Trisazo photsensitive member for electrophotography

This invention relates to an electrophotographic photosensitive member utilizing a novel electrophotographic photosensitive material, more particularly to an electrophotographic photosensitive member endowed with high sensitivity as well as excellent potential stability during repeated copying by incorporating an azo pigment having a specific molecular structure in the photosensitive layer.

Electrophotographic photosensitive member comprising disazo pigment

An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the general formulae (1) to (6).

Photosensitive member for electrophotography comprising azo pigments

An electrophotographic photosensitive member comprises a photosensitive layer containing a disazo pigment represented by the formula, ##STR1## wherein R.sub.1 and R.sub.2, which may be either identical or different, each represent hydrogen atom, alkyl group, alkoxy group, halogen atom or cyano group, and A represents a coupler residue having a phenolic hydroxyl group.

Electrophotographic photosensitive member contains disazo

An improved electrophotographic photosensitive member is composed of a layer containing a hydrazone compound represented by the formula ##STR1## wherein R.sub.2 and R.sub.3 are each unsubstituted alkyl or substituted alkyl, unsubstituted aralkyl or substituted aralkyl, or unsubstituted aryl or substituted aryl, with the proviso that R.sub.2 and R.sub.3 are not simultaneously alkyls, n is 1 or 2, when n is 1, A represents ##STR2## wherein R.sub.1 is C.sub.1 -C.sub.5 alkyl, unsubstituted aralkyl, or substituted aralkyl, and when n is 2, A represents a direct single bond between two ##STR3## radicals.

An electrophotographic photosensitive member characterized by containing at least one azo pigment represented by the following formula (1), (2), or (3): ##STR1## In these formulae; ##STR2## wherein Z represents ##STR3## in which R.sub.71 is hydrogen, or substituted or unsubstituted alkyl; n is 0 or 1; R.sub.21, R.sub.22, R.sub.61 and R.sub.62 represent hydrogen, alkyl, alkoxy, nitro, or hydroxyl R.sub.31 and R.sub.32 represent hydrogen or alkoxy; and R.sub.41, R.sub.42, R.sub.43, R.sub.44, R.sub.51, R.sub.52, R.sub.53 and R.sub.54 represent hydrogen, halogen, or organic monovalent residue. ##STR4## wherein X represents a residue necessary for completing an aromatic hydrocarbon ring or a heterocyclic ring, each ring being substituted or unsubstituted; R.sub.11 represents hydrogen or alkyl; R.sub.12 represents methyl, ethyl or C.sub.3 -C.sub.8 linear alkyl; and R.sub.17 and R.sub.18 represent alkyl, aralkyl or aryl, each substituted or unsubstituted. In formula (2), R.sub.11, R.sub.12 and X are as defined above; R.sub.13 and R.sub.14 represent hydrogen or cyano; and R.sub.15 and R.sub.16 represent hydrogen, halogen, alkyl, alkoxy, nitro or hydroxyl.

Disazo electrophotographic photosensitive member

An electrophotographic photosensitive member having a photosensitive layer of a laminate structure comprising a charge generation layer and a charge transport layer on a conductive substrate, characterized in that the charge generation layer contains an aluminum chloride phthalocyanine pigment and the charge transport layer contains a hydrazone compound represented by the general formula ##STR1## wherein R.sub.1 and R.sub.2 represent alkyls or are residues forming a cyclic amino group together with the nitrogen atom which links them, and R.sub.3 represents hydrogen or halogen.

An organic film comprising at least one compound of the following formulae (1)-(5): ##STR1## wherein R.sub.11 and R.sub.13 each represent substituted or unsubstituted aryl, R.sub.12 represents substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR2## wherein R.sub.21, R.sub.22, and R.sub.24 each represent substituted or unsubstituted aryl, R.sub.23 represents substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR3## wherein R.sub.31, R.sub.33, and R.sub.35 each represent substituted or unsubstituted aryl, R.sub.32 and R.sub.34 each represent substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR4## wherein R.sub.41 represents alkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted styryl, R.sub.42 represents substituted or unsubstituted arylene, R.sub.43 represents substituted or unsubstituted aryl, and A.sup..crclbar. represents an anionic residue; and ##STR5## wherein R.sub.51 represents alkoxy, R.sub.52 represents alkyl, R.sub.53 represents substituted or unsubstituted arylene, R.sub.54 represents substituted or unsubstituted aryl, A.sup..crclbar. represents an anionic residue, and n represents an integer of 1 or 2.

Recording medium and process employing a photosensitive organic film

An electrophotographic photosensitive member comprises a layer containing at least one disazo pigment represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent hydrogen, halogen, lower alkyl or lower alkoxy; R.sub.3 represents methyl, ehtyl or C.sub.3 -C.sub.10 linear alkyl; and X represents a residue necessary to complete an aromatic hydrocarbon ring or heterocyclic ring, substituted or unsubstituted.

Electrophotographic photosensitive member with oxadiazole containing

An electrophotographic photosensitive member and use thereof, having a photosensitive layer upon or over an electrically conductive substrate, the photosensitive layer comprising an organic photoconductive material selected from the group consisting of the following general formula (1), (2), or (3): ##STR1## wherein A represents a coupler component having aromaticity, ##STR2## wherein, A represents a coupler component having aromaticity, R represents hydrogen, halogen, alkyl, or alkoxy, and n represents an integer of 1 to 4, ##STR3## wherein, A represents a coupler component having aromaticity and R.sub.1 represents a single bond or a substituted or unsubstituted divalent hydrocarbon or heterocyclic residue.

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Yokohama, Japan

Shozo Ishikawa