Fuji Electric Co., Ltd.

Yoshimasa Hattori

Noboru Furusho

Masami Kuroda

Yoshinobu Sugata

Yoichi Nakamura

Koji Kawaguchi

Youichi Tei

Masayo Amano

Youichi Nakamura

Kazumi Egota

Shinji Shirai

Yoshimasa Tomiuchi

Osamu Nabeta

A perfluoropolyether liquid lubricant is provided which has an amine functional group at at least one of ends of a chain molecule. A magnetic recording medium using the lubricant assures increased bonding force between a carbon protective layer and a lubricant layer.

Liquid lubricant, magnetic recording medium using the same, and method

An electrophotographic photoconductor has a conductive substrate and a photosensitive layer. The photosensitive layer is laminated on the conductive substrate and includes at least phthalocyanine compound as a photoconductive material. In the photosensitive layer, the content of o-phthalonitrile polymer except the phthalocyanine compound is in a range of 100 nmol to 200 mmol with respect to 1 mol of the phthalocyanine compound. Thus, the electrophotographic photoconductor has an excellent surface-charge retention.

Electrophotographic photoconductor

A photoconductor for electrophotography includes a distyryl compound of the general formula (I) as a charge generation material and a bisazo compound of the general formula (II) as a charge transport material. ##STR1##

Photoconductor for electrophotography containing distyryl compound

A photoconductor for electrophotography includes an electroconductive substrate; and a photosensitive layer formed on the substrate. The photosensitive layer includes a charge generating substance consisting essentially of at least one polycyclic compound represent by general formula (I) and at least one azo compound represented by general formula (II). ##STR1## wherein X is selected from the group consisting of a hydrogen atom, a halogen atom and a cyano group and n is an integer of 0 to 4; ##STR2## wherein R is selected from the group consisting of a hydrogen atom, a halogen atom and a substituted or unsubstituted alkyl group and alkoxy group, Z1 is selected from the group consisting of a substituted or unsubstituted alkyl group, aryl group and aromatic heterocyclic group, Z.sub.2 is selected from the group consisting of a hydrogen atom, a cyano group, a carbomoyl group, a carboxyl group, an ester group and an acyl group, each of Z.sub.3 and Z.sub.4 is selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group and a substituted or unsubstituted alkyl group and alkoxy group.

Photoconductor for electrophotography with a charge generating substance

A photoconductor for electrophotography includes an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. One type of bisazo compound is represented by general formula: ##STR1## wherein, A stands for a coupler residue.

Bisazo photoconductor for electrophotography

A photoconductor for electrophotography comprises an electroconductive substrate and a photoconductive layer formed on the substrate and including a novel disazo compound as a charge generating layer. The disazo compound is represented by the following general formula: ##STR1## wherein X1 stands for one of an alkyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted, X.sub.2 stands for one of a hydrogen atom, a cyano group, a carbamoyl group, a carboxyl group, an ester group and an acyl group, each of X.sub.3 and X.sub.4 stands for one of a hydrogen atom, a halogen atom, a nitro group, an alkyl group and an alkoxyl group, both of last two groups may be or not may be substituted, Z stands for one of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted and --N.dbd.N--D--N--N.dbd.N-- stands for a disazo residual group.

Diazo photoconductor for electrophotography

A photoconductor for electrophotography comprises a substrate and a photosensitive layer formed on the substrate and including a novel tetrakisazo compound. The one type of the tetrakisazo compound is represented by the following general formula. ##STR1## Wherein A stands for a coupler residual group and R stands for one of a hydrogen atom, an alkyl group and an aryl group which may have a substituent group.

Photoconductor for electrophotography

A photoconductor for electrophotography comprises a substrate and a photosensitive layer formed on the substrate and including a novel azo compound. The one type of the azo compound is represented by the following general formula. ##STR1## Wherein Cp stand for a coupler residual group and R.sub.1 stand for one of a hydrogen atom, a lower alkyl group, a lower alkoxy group and carbamoyl group.

A photoconductor for electrophotography, including an electroconductive substrate; and a photosensitive layer formed on the electroconductive substrate and including a nobel azo compound or disazo compound as a charge generating substance. An azo compound is represented by the following general formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 stands for a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group, an alkoxy group, an allyl group, an aryl group, an aralkyl group, a carboxyl group or an ester group, and C.sub.p stands for a residual group of a coupler.

Photoconductor for electrophotography containing azo or disazo compound

A photoconductor for electrophotography comprises a novel disazo compound as a charge generating substance. A disazo compound is represented by the following general formula: ##STR1## wherein, each of Ar.sub.1 and Ar.sub.2 stands for an aromatic hydrocarbon group or an aromatic heterocyclic group, both of which may have a substituent(s),

AZO photoconductor for electrophotography

A photoconductor for electrophotography comprising a novel squarylium as a charge generating substance. A squarylium compound is represented by the following general formula: ##STR1## wherein, each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 stands for a hydrogen atom, a halogen atom, an alkyl group, an aryl group, or a nitro group, and each of R.sub.7 and R.sub.8 stands for a hydrogen atom or a hydroxy group.

Photoconductor for electrophotography having a squarylium charge

A photoconductor for electrophotography comprises a novel azo compound as a charge generating substance. An azo compound is represented by the following general formula: ##STR1## wherein, X.sub.1 stands for an alkyl group which may have a substituent(s) or a phenyl group which may have a substituent(s), X.sub.2 stands for a hydrogen atom, a cyano group, a carbamoyl group, an ester group, an acetyl group or a propyonyl group, each of X.sub.3 and X.sub.4 stands for a hydrogen atom, a halogen atom, a nitro group, an alkoxy group or an alkyo group which may have a substituent(s), and D stands for a substituent.

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Kawasaki, Japan

Yoshimasa Hattori