Abstract: This invention relates to an electrophotographic recording material comprising a conductive support, an organic substance capable of transporting electrical charge, and a dyestuff of purple to violet color, having: (a) an X value in the range of from 0.13 to 0.52 and a Y value within the range of from 0.019 to 0.33 in the CIE system, (b) an extended .pi.-electron system of at least 20 .pi.-electrons, and (c) possessing a reflectance of not more than 50% throughout the spectral region of 420 to 750 nm when in the form of a single color-masking layer of about 0.1 g/m.sup.2, and which has a high photosensitivity throughout the said spectral range. The invention also relates to a process for the preparation of the novel recording material.

Abstract: In organic, photoconductive insulating compositions including one or more organic photoconductors, the image contrast characteristics obtained when using such compositions can be modified or modifiable when the composition includes a triaminobenzene compound, such as one having the formula ##SPC1##Wherein each of Z, Z.sup.1 and Z.sup.2, taken together with the nitrogen to which each is attached, represents the non-metallic atoms necessary to complete a heterocyclic group having from 5 to 10 atoms in the cyclic nucleus.

Abstract: Electrostatographic imaging method employing an imaging member provided with a photoconductive imaging layer containing an organic photoconductive material, an activator capable of forming a charge transfer complex with said material and a protonic acid sensitizer. The acid sensitization of the charge transfer complex in this imaging layer dramatically enhances the photosensitivity of this photoconductive composition and yet avoids the undesirable memory effects generally experienced in such materials when a photoconductive layer of these materials is imaged in accord with the method of this invention.

Abstract: This invention relates to supersensitizing dye combinations useful for organic photoconductive compositions comprising: at least one cyanine, merocyanine, rhodacyanine or styryl spectral sensitizing dye which1. has an anodic polarographic half-wave potential less than +1.0 volts;2. has an anodic polarographic half-wave potential and a cathodic polarographic half-wave potential which, when added together, give a sum more negative than -0.10 volts; and3. desensitizes negative silver bromide emulsions, containing 99.35 mole percent bromide, less than 0.4 log E at radiation of 365 nm. when incorporated therein at a concentration of 0.2 millimole of dye per mole of silver halide; and at least one electron-accepting dye such as a pyrylium or thiapyrylium salt as the supersensitizer.

Abstract: This invention relates to an electrophotographic recording material comprising an electrically conducting supporting material having thereon a photoconductive double layer of organic materials, said double layer being composed of a homogeneous, opaque, charge carrier-producing dyestuff layer and a transparent top layer of insulating material containing at least one charge-transporting compound, the transparent top layer comprising a binder and a charge-transporting aromatic compound with an extended .pi.-electron system which is substituted by at least one substituted amino group, and the dyestuff layer comprising a condensation product of an aromatic aldehyde and a compound carrying an active methylene group.

Abstract: An electrophotographic photosensitive material having an electrophotosensitive layer comprising a finely divided inorganic photoconductive material, a sensitizing dye for the photoconductive material and a resinous binder on a support and to be subjected to bleaching treatment after the formation of a visible image to remove the coloration with the sensitizing dye from the electrophotosensitive layer with a solution containing an organic acid or an alkali metal hydroxide, which comprises the resinous binder being crosslinked with polyisocyanate to be rendered insoluble in an organic solvent.

Abstract: Ambipolar photoconductive composition comprising the product of the in situ polymerization of at least one cyclic compound of the formula: ##EQU1## wherein Ar is a polyaromatic nucleus selected from the group consisting of diradicals of naphthalene, anthracene, pyrene and carbazole;X and Y are independently selected from the group consisting of halogen, NO.sub.2, NH.sub.2 ; lower alkyl, phenyl, phenoxy, lower alkoxy, carboxy, hydroxyl, lower alkyl esters and aryl esters;m and n can range from 0 to the total number of replaceable hydrogens on the polyaromatic nucleus;In a polymeric host resin.By the appropriate in situ polymerization of the above compound in the host polymer, it is possible to produce an interpretating photoconductive netword throughout the host polymer. The resulting photoconductive materials can be incorporated into an imaging member in an electrostatographic imaging system and function in either a positive or negative charging mode.

Abstract: There are provided sensitizers for electrophotographic light-sensitive materials including organic photoconductors and electrophotographic light-sensitive materials containing same. The sensitizers are reaction products comprising benzopyrylium salt and benzopyran.

Abstract: Method for enhancing both the rate and completeness of discharge of a photoconductive insulating layer comprising phthalocyanine pigments. Such enhancement is achieved by incorporation within such layer of from about 0.1 to about 10 weight percent, based upon phthalocyanine content, of at least one charge transport sensitizer compound of the formula ##SPC1##Wherein R.sub.1 is alkyl of 1-6 carbon atoms;R.sub.2 is aryl, aralkyl, p-alkylaminophenyl, or substituted p-dialkylaminophenyl;R.sub.4 represents a hydrocarbon diradical making up the balance of an aromatic ring system;R.sub.3 is alkyl, aryl, alkaryl, heterocyclo, amino, alkyl substituted amino, nitro, alkoxy or halogen;X is sulfur, oxygen or selenium; andA is a monovalent or divalent anion.

Abstract: Electrophotographic sheet material comprising a dye-sensitized photoconductive layer is made resistant to fading of its light-sensitivity by incorporating in the photoconductive layer a nitro-substituted xanthene dye, e.g. safrosin.

Abstract: A recording material is described, which comprises a support of paper or of synthetic polymer and an electroconductive layer on at least one side of the support. The surface resistance of this electroconductive layer is not more than 10.sup.11 ohms per sq. at a relative humidity of 15%. The layer consists or includes a major proportion of a water-soluble polymer resulting from the amino alkylation of polyethyleneimine with an epoxy compound bearing a quaternary ammonium end group.The electroconductive layers may be used as antistatic layers in a photographic silver halide recording material. When covered with a photoconductive coating the electroconductive layer may be used in electrophotographic recording materials. When an insulating layer is applied on the electroconductive layer an electrographic recording material is formed.

Abstract: A photographic material comprising a support coated at one side with one or more silver halide emulsion layers and at the opposite side with an electroconductive interlayer which in its turn is coated with a photoconductive layer essentially consisting of at least one organic photoconductive compound, said silver halide emulsion layer or layers being of the type that yield a latent image on exposure with actinic light and of which the latent image is developable to a silver image with a reducing agent applied as developing agent in silver halide photography, said electroconductive interlayer having a resistivity being at least 1000 times smaller than that of the photoconductive layer, and the composition of the non-developed photographic material being such, that the combined spectral density of the support, of the conductive interlayer and of the photoconductive layer does not exceed 0.3 in the wavelength range of 400 to 700 nm.

Abstract: This invention relates to organic compounds useful as sensitizers for organic photoconductive compositions having one of the following formulas: ##SPC1## ##SPC2##Wherein:R.sup.1 represents a hydrogen atom, an alkyl radical having 1 to about 15 carbon atoms, a substituted alkyl radical wherein the alkyl moiety contains from 1 to about 15 carbon atoms and wherein the substituents are phenyl radicals or alkoxy radicals containing 1 to about 4 carbon atoms, a phenyl radical, and a substituted phenyl radical having as substituents alkyl radicals having 1 to about 15 carbon atoms or alkoxy radicals having 1 to about 4 carbon atoms;R.sup.2 represents R.sup.1 and a radical having the following formula: ##EQU1## X represents a hetero atom selected from the group consisting of an oxygen and a sulfur atom; andZ.sup.- is an anionic function.

Abstract: Reproduction elements coated with organic photoconductors are made with improved and/or more widely selectable electrophotographic properties by employing in the photoconductive coating a donor-acceptor complex composed of a known organic electron donor having photo- or semiconductor properties, e.g. a poly-N-vinylcarbazole or polyvinylpyrene, and a N-(fluoren-9-ylidene)-aniline compound as an activating electron acceptor. Especially effective as the electron acceptor are certain new compounds, namely, p- and m-nitro-N-(2,4,7-trinitrofluoren-9-ylidene)-aniline and p-methylsulfonyl-N-(2,4,7-trinitrofluoren-9-ylidene)-aniline.

Abstract: A light-transparent photoconductive material for use in electrophotography is the reaction product obtained by condensingA. an organic photoconductive compound containing an amino and/or hydroxyl group andB. a reactive colored compound containing an active halogen atom;Or by condensingA. an organic photoconductive compound containing an active halogen atom andB. a reactive colored compound containing an amino and/or hydroxyl group.

Abstract: Magenta image dye-providing compound having formulas as follows: ##SPC1##Wherein:Car represents a carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye from said compound;m and q each represent an integer having a value of 0 or 1;X represents a bivalent linking group;R represents hydrogen or alkyl;J represents a bivalent radical selected from sulfonyl or carbonyl;Q represents hydrogen, hydroxy or an acylamino radical;G represents hydroxy, a salt thereof, or a hydrolyzable acyloxy group;r represents an integer having a value of 1 or 2;Z represents cyano, trifluoromethyl, a carboxy, a carboxylic acid ester, nitro in the 2- or 3- position relative to the azo radical, fluorosulfonyl, sulfo, halogen, an alkylsulfonyl radical; a phenylsulfonyl radical, alkylcarbonyl, a sulfamoyl radical; a carbamoyl radical, and, in formulas I or II when r is 1, Z may represent a radical having the formula Car-[X--(NR--J).sub.q ].sub.

Abstract: An organic photoconductive composition, useful as an electrophotosensitizing material consisting of an organic photoconductive compound and a compound having an active methylene, as chemical sensitizer, represented by the formula,R--COCH.sub.2 --Xor ##EQU1## wherein R is a substituted or unsubstituted phenyl, alkyl, arylamino, alkylamino, aryloxy or alkoxy; X is acyl, carbamoyl, phenyl-substituted carbamoyl or cyano; Y is carbonyl, oxygen, sulfur, ##EQU2## (wherein L is hydrogen or alkyl); Z is a residue necessary to form a 5- or 6-membered ring, and method for making the same.

Abstract: A magenta image dye-providing compound having a formula as follows: ##SPC1##Wherein:Car represents a carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye from said compound;m and q each represent an integer having a value of 0 or 1;X represents a bivalent linking group;Z.sup.1 represents hydrogen or Z;R.sup.1 represents hydrogen, an alkyl radical an alkoxy radical having 1 to about 4 carbon atoms, or halogen;D represents cyano, sulfo, fluorosulfonyl, halogen, a --SO.sub.

Abstract: An electrophotographic member comprising a resin binder and an organic photoconductive composition and a process using the electrophotographic member, the composition consisting essentially of a compound of the formula (A), its dimeric compound or its polymeric compound: ##SPC1##Whereim R.sub.1 is hydrogen atom, halogen atom, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, alkoxycarbonyl group having alkyl group 1 to 4 carbon atoms, nitro group, alkylene group having 1 to 3 carbon atoms which is capable of forming a bis-compound, or a bond which is capable of forming a bis-compound, R.sub.

Abstract: A high polymer compound containing therein the reactive group represented by the following general formula; ##SPC1##Wherein X represents O or S; Y represents a hydrogen atom or a cyano group; and R.sub.2 represents a hydrogen atom, an alkyl group having not more than 4 carbon atoms, a halogen atom or a nitro group.

Abstract: A nondiffusible sulfonamide compound which is alkali-cleavable upon oxidation to release a diffusible magenta color-providing moiety from a benzene nucleus thereof, said compound having a formula as follows: ##SPC1##WhereinBall represents an organic ballasting group.Y represents the carbon atoms necessary to complete a benzene or naphthalene nucleus;X represents a bivalent linking group;R represents hydrogen or alkyl;J represents sulfonyl or carbonyl;M and q each represent an integer having a value of 0 or 1;R.sup.

Abstract: An electrophotographic material is provided herein which comprises a conductive support layer and a photoconductive insulating layer, the latter layer comprising a photoconductive polymeric compound such as poly-N-vinylcarbazole, and a sensitizer having the following general formula ##SPC1##WhereinB represents a radical selected from the group consisting of ##SPC2## ##SPC3##Compounds falling under the latter general formula include such compounds as 2-phenyl-4-[(2'-phenyl-4'-benzopyranylidene) benzyl]-benzopyrylium perchlorate and 2,3-phenyl-4-[(2'-phenyl 4'-benzopyranylidene)benzyl]-6-methylbenzopyrylium perchlorate.