Abstract: 1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene having the following formula (I): ##STR1## and a method of preparing the above-mentioned 1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene having formula (I) by allowing a phosphonium salt having formula (II) to react with 5-(4-nitrophenyl)-2,4-pentadiene-1-al having formula (III) in the presence of a basic catalyst:R.sub.3 P.sup..sym. H.sub.2 C--CH.dbd.CH--CH.sub.2 P.sup..sym. R.sub.3.2X.sup..crclbar.

Abstract: Polyolefin derivatives, which are useful not only as the photoconductive materials for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor which uses an organic or inorganic pigment as a charge generating material, and an electrophotographic photoconductor containing at least one of the above polyolefin derivatives in a photoconductive layer thereof, are disclosed.

Abstract: Polyolefin derivatives, which are useful not only as the photoconductive materials for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor which uses an organic or inorganic pigment as a charge generating material, and an electrophotographic photoconductor containing at least one of the above polyolefin derivatives in a photoconductive layer thereof, are disclosed.

Abstract: Indenylidene compounds, which are useful not only as the photoconductive material for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor in which an organic or inorganic pigment is used as a charge generating material, and an electrophotographic photoconductor containing at least one of the above indenylidene compounds in a photoconductive layer thereof, are disclosed.

Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising at least one amino compound of the formula: ##STR1## wherein A represents a substituted or unsubstituted aromatic hydrocarbon group; R.sup.1 and R.sup.2 each represent hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; Ar represents a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted heterocyclic ring; R.sup.3 and R.sup.4 each represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, and n is an integer of 0, 1 or 2.

Abstract: An electrophotographic photoconductor is disclosed which comprises an electroconductive support and a photoconductive layer formed thereon, which photoconductive layer comprises as a charge generating material an azo pigment having general formula (I): ##STR1## wherein R.sup.1, R.sup.2, X, A and n are respectively defined in the specification.

Abstract: An electrophotographic photoconductor is disclosed which comprises an electroconductive support and a photoconductive layer formed thereon, which photoconductive layer comprises as a charge generating material an azo pigment having general formula (I): ##STR1## wherein R.sup.1, R.sup.2, X, A and n are respectively defined in the specification.

Abstract: Charge transporting materials containing compounds having the formula (I): ##STR1## wherein R.sup.1 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a thioalkoxy group, an aryloxy group, a methylenedioxy group, an aralkyl group, a nitro group, or an unsubstituted or substituted aryl group; R.sup.2 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, halogen; and R.sup.3 and R.sup.4 each represent hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, halogen, a dialkylamino group, an amino group, a thioalkoxy group, an aryloxy group, a methylenedioxy group, an aralkyl group, or an unsubstituted or substituted aryl group, k, m and n each represent an integer of 0 to 5, and l represents an integer of 0 to 4, provided that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 cannot be hydrogen at the same time.

Abstract: Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitve layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.

Abstract: An electrophotographic photoconductor an electroconductive substrate, an intermediate layer comprising a charge generating azo pigment and a thermosetting resin, a charge generating layer and a charge transporting layer, which layers are successively overlaid on the electroconductive substrate, the charge generating azo pigment being any of the azo pigments (1) through (4): ##STR1##

Abstract: A thermosensitive image transfer recording medium comprising a support material and a thermofusible ink layer formed thereon, comprising an image gradation control agent, a coloring agent and a carrier material for holding the coloring agent at normal temperatures and to carry the coloring agent, upon application of heat, out of said thermofusible ink layer for image formation, all of which are contained in a fine porous resin structure.

Abstract: The present invention relates to a photosensitive material for use in electrophotography, characterized by having a photosensitive layer containing a disazo pigment having the following general formula (I), ##STR1## wherein A represents a coupler residue.

Abstract: The present invention relates to a novel disazo compound having the following general formula (I), ##STR1## wherein A represents ##STR2## (wherein R represents an alkyl, alkoxy, nitro, halogen, cyano or halomethyl group; n represents an integer of 0, 1, 2 or 3; and R may be the same or different when n is an integer of 2 or 3), and a method for preparing the same.The present invention further relates to a photosensitive material for use in electrophotography, characterized by providing a photosensitive layer containing a disazo pigment having the following general formula (VII), ##STR3## wherein A.sub.1 represents a coupler residue and R' represents hydrogen or a lower alkyl group.

Abstract: A disazo compound is provided which is represented by the formula (I): ##STR1## (wherein, R.sub.1 and R.sub.2 each stands for hydrogen, a lower alkyl group with 1-4 carbon atoms, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aromatic group, or a substituted or unsubstituted hetero ring group. R.sub.1 and R.sub.2 may be the same or different. And, R.sub.1 and R.sub.2 may mutually bond to form a ring).This disazo compound may be obtained by diazotating 2.6-diaminoanthraquinone and reacting the same with a coupler represented by the formula (IV): ##STR2## (wherein, R.sub.1 and R.sub.2 are the same as defined above). Further, a multilayer type electrophotographic element is provided which comprises a charge carrier generating layer and a charge transfer layer and uses, as a charge carrier generating substance, a disazo compound represented by the formula (I).

Abstract: The present invention relates to a tetrazonium salt compound having the following general formula (I), ##STR1## wherein X represents an anion functional group. The present invention further relates to a disazo compound having the following general formula (II), ##STR2## wherein A represents ##STR3## (wherein R represents an alkyl such as methyl, ethyl, propyl, butyl or the like, alkoxy, nitro, halogen, cyano or halomethyl group; n represents an integer of 0, 1, 2 or 3; and R may be the same or different when n is an integer of 2 or 3), and a method for preparing the same. The present invention still further relates to a photosensitive material for use in electrophotography, characterized by providing a photosensitive layer containing a disazo pigment having the following general formula (VII), ##STR4## wherein A.sub.1 represents a coupler residue.

Abstract: Bisazo compounds represented by the general formula ##STR1## wherein R represents a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, and when R is fluorine, it is at the ortho, para or meta position in each phenylcarbamoyl group; when R is chlorine, it is at the ortho position; when R is bromine, it is positioned at the ortho or meta position; and when R is iodine, it is at the meta position, which bisazo compounds are particularly suitable for use in the charge generating layer of a layered electrophotographic photoconductor.

Abstract: A thermosensitive image transfer recording medium comprising a support material and a thermofusible ink layer formed thereon, which thermofusible ink layer comprises a dye component, a binder agent and a pigment having a needle-like crystal form, which is dispersed in a network form throughout the thermofusible ink layer.

Abstract: An electrophotographic printing original plate is disclosed, which comprises an electroconductive support material and an electrophotographic photosensitive layer formed thereon, which electrophotographic photosensitive layer comprises (i) a charge generation layer consisting essentially of a particular azo pigment serving as a charge generating material and (ii) a charge transport layer consisting essentially of a charge transporting material and an alkali-soluble resin; and an electrophotographic printing plate making process using the above printing original plate is also disclosed, which comprises the steps of electrically charging uniformly the above printing original plate, exposing the charged printing original plate to optical images to form latent electrostatic images thereon, developing the latent electrostatic images with toner, fixing the toner images to the printing original plate, and removing the electrophotographic photosensitive layer portions corresponding to the non-image areas of the print

Abstract: A disazo compound having the general formula (1) ##STR1## (wherein X represents a substituted or unsubstituted aromatic ring or hetero ring, and Ar represents a substituted or unsubstituted aromatic ring or hetero ring);a method of making said disazo compound which comprises using, as a starting material, couplers having the general formula (2) ##STR2## and the general formula (4) ##STR3## (wherein X and Ar are the same as defined above); and a multilayer type electrophotographic element using said disazo compound as a charge transfer substance.

Abstract: A toner for developing latent electrostatic images comprising a binder agent and a charge controlling agent of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent an unsubstituted or substituted aromatic ring, such as an unsubstituted or substituted benzene ring or naphthalene ring; and n is an integer of 0 or 1.