Abstract: An electrophotographic photoreceptor is formed by a photosensitive layer containing a naphtylhydrazone compound of the formula: ##STR1## wherein X and Y are independently a hydrogen atom, lower alkyl group, lower alkoxy group, phenoxy group or arylalkoxy group; R.sup.1 is a naphtyl group; R.sup.2 is a hydrogen atom, lower alkyl group, allyl group, substituted or unsubstituted phenyl group, or aralkyl group; and l and m are 1 or 2. The photoreceptor thus formed is not only highly sensitive but resistant to ozone deterioration, which markedly improves the durability thereof.

Abstract: A photosensitive member for electrophotography having a photosensitive layer containing a hydrazone compound represented by the following general formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 independently represent a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; R.sup.3 represents a halogen atom; m is 1 or 2; and n is 0, 1 or 2. The photosensitive member has not only extremely high sensitivity but also sufficiently low residual potential. It is also highly resistant to fatigue so that the repeated use provides it with little accumulation of residual potential and little variation of surface potential and sensitivity.

Abstract: New electrically conductive material suitable particularly for a secondary battery and a process for preparing the electrically conductive material are provided. The process for the preparation of the electrically conductive material comprises the steps of reacting a compound having conjugated double bonds with an oxidizing agent wherein the oxidizing agent comprises a cupric compound and a nitrile compound. The electrically conductive material comprises grainy polypyrrole obtained by reacting a pyrrole compound with an oxidizing agent which is constituted by primary particles having an average particle size of 0.01 to 0.4 .mu.m and has a press molding density of 1 to 1.6 g/cm.sup.3.

Abstract: An azo compound with the following general formula (I): ##STR1## wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group;Y is phenylene or naphthylene group;Z.sub.1 and Z.sub.2 are independently the divalent group represented by the following formula: ##STR2## wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; andn is 1 or 2,is disclosed. Such compounds are useful in forming a photosensitive layer of an electrophotographic photoreceptor.

Abstract: A photosensitive member for electrophotography comprising at least a photoconductive layer on a conductive substrate, the photoconductive layer containing polyvinyl acetal having a constituent unit represented by the following general formula [I]: ##STR1## wherein Ar represents an aryl group, R.sub.1 a hydrogen atom, a lower alkyl group or an arly group, and m an integer of 0 or 1-3, and a constituent unit represented by the following general formula [II]: ##STR2## wherein R.sub.2 represents a hydrogen atom or an acyl group, the constituent unit of the general formula [I] being 40 mole % or more, and the total of the constituent units of the general formulae [I] and [II] being 60 mole % or more. This photosensitive layer has high sensitivity and durability and low residual potential.

Abstract: An electrically conductive material containing no substantial amount of water and prepared by polymerizing, in the presence of an oxidizing agent, a compound having conjugated double bonds on a base material in a gas phase. The base material has spaces capable of retaining the oxidizing agent. The electrically conductive material is used for at least one electrode of a secondary battery.

Abstract: A dual layer photoreceptor for use in electrophotography, wherein a charge transport layer containing a hydrazone compound and a binder polymer is laminated on a charge generation layer containing a titanium phthalocyanine compound of the formula: ##STR1## wherein X represents hydrogen atom, lower alkyl group, lower alkoxy group, allyloxy group, nitro group, cyano group, hydroxy group, benzyloxy group or halogen atom, Y represents halogen atom, alkoxy group or oxygen atom, n represents an integer of 1 or 2 and m represents an integer of 0 to 4, and a binder polymer, formed on an electroconductive substrate.

Abstract: Disclosed is a crystalline oxytitanium phthalocyanine which shows intense diffraction peaks at Bragg angles (2.theta..+-.0.2.degree.) of 9.3.degree., 10.6.degree., 13.2.degree., 15.1.degree., 15.7.degree., 16.1.degree., 20.8.degree., 23.3.degree., 26.3.degree. and 27.1.degree. in the X-ray diffraction spectrum, the intensity of the diffraction peak at Bragg angle of 26.3.degree. being most strong and the intensity of the diffraction peaks at Bragg angles between 4.degree.-8.degree. being less than 5% of the intensity of the diffraction peak at Bragg angle of 26.3.degree.. Further, disclosed is a photoreceptor for use in electrophotography, comprising at least a charge carrier generation layer in which the oxytitanium phthalocyanine above is dispersed in a binder polymer and a charge carrier transport layer laminated thereon.

Abstract: An electrophotographic photoreceptor according to this invention has a photosensitive layer in which a photoconductive substance with the following general formula (I): ##STR1## wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group;Y is phenylene or naphthylene group;Z.sub.1 and Z.sub.2 are independently the divalent group represented by the following formula: ##STR2## wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; andn is 1 or 2, is incorporated.

Abstract: An electrophotographic plate comprising a photosensitive layer containing a hydrazone compound represented by the general formula: ##STR1## (where X, Y and Z represent independently hydrogen atom, a lower alkyl group, a lower alkoxy group, phenoxy group or an arylalkoxy group; R represents hydrogen atom, a lower alkyl group, allyl group, an aralkyl group or an optionally substituted phenyl group; m and l represent independently 1 or 2; and n represents 0 or 1).

Abstract: This invention relates to an improved process for producing certain phosphinic acid derivatives of aminothio methyl carbamate by reacting N-(halothio)phosphinic acid amide and a carbamate compound in the presence of a cupric catalyst in high yields. These compounds are known to be useful as insecticides.

Abstract: A process for producing stabilized polyolefins comprising adding an epoxide to a polyolefin slurry obtained through polymerization of .alpha.-olefins in the presence of a catalyst containing a halide of a transition metal and an organoaluminum compound to render the catalyst remaining in the polymer inactive, and then subjecting the polyolefin slurry after the above inactivation treatment to an evaporation treatment. The process is extremely simple and results in polyolefins and molded products which are highly stable against discoloration and heat.