Abstract: Electroconductive coating formulations consisting essentially of (1) a barrier coating which comprises a copolymer of ethylene and vinyl acetate, styrene-butadiene latexes, sodium alginate or fluorocarbons with starch; and (2) a conductive coating.

Abstract: A method is provided for producing liquid permeable diaphragms for an electrolytic cell having a plurality of foraminous electrodes and a space between each pair of adjacent electrodes. The method comprises covering the foraminous electrodes with a liquid permeable thermoplastic support fabric and contacting the covered electrodes with a slurry of an electroactive material. Roller means are placed in the space between the pair of electrodes, the roller means comprising two rollers spaced apart, each of the rollers contacting only one of the pairs of electrodes, and moving the roller means to force the electroactive material into the liquid permeable thermoplastic support fabric whereby liquid permeable diaphragms are produced.

Abstract: Electrical conductors for use in microelectronic circuitry are prepared from a flexible, polymeric fiber selected from the group of flexible, polymeric fibers consisting of silk, polyacrylonitrile, regenerated cellulose, polyester, and polyamide. The selected fiber is made conductive by coating by a method wherein the fiber is immersed for a predetermined time period of from about 30 minutes to about 60 minutes in a solution prepared from equal portions of a silver nitrate-aqueous ammonia solution and a silver nitrate-potassium-sodium tartrate solution. These solutions coat the selected polymeric fiber with metallic silver. The excess solution is washed off and the coated fiber is air dried or dried in a low temperature oven at about 50.degree. C. The process is repeated if a heavier coating of silver on the fibers is desired for better conductivity. For use, the metallic silver coated fiber is cut to required length and tested for resistivity which should be near one ohm.

Abstract: Electrostatically imageable drafting film which comprises a plastic, impermeable, non-conductive, actinically transparent film support coated first with a conductive layer which is then overcoated by a dielectric composition comprising a suitable toothing pigment and a binder resin.

Abstract: A method of producing electrically insulating highly flexible and/or solderable coatings on electrical conductors or fibre materials which comprises(A) coating on said conductor or fibre material with a solution comprising:(i) isocyanates masked with compounds having reactive hydrogen atoms in the molecule and selected from the group consisting of acid amides having 1 or 2 amide hydrogen atoms, hydroxylamine, reaction products of hydroxylamine with carbonyl compounds, imines having an imine hydrogen atom, and lactams with melting or sublimation points below 25.degree. C.

Abstract: The electrostatic recording material comprises an electroconductive transparent base sheet having a dielectric layer thereon. The base sheet is obtained by moistening a paper prepared from relatively lightly beaten pulp and then subjecting the moistened paper to a calendering treatment with the use of a heated embossing metal roll having a finely engraved surface with sharp reliefs.

Abstract: An electroconductive substrate for an electrically responsive recording material comprising a porous substrate and a layer of at least one cationic or anionic electric conductor, the conductor layer being formed in the porous substrate along the entire thickness direction thereof extending from one surface of the porous substrate to the other surface of the porous substrate, wherein the conductor layer has a multilayer distribution structure comprising (a) a layer of a cationic electroconductive resin distributed predominantly in the one surface portion of the porous substrate, (b) a layer of an anionic electroconductive resin distributed predominantly in the other surface portion of the porous substrate and (c) a layer of a polysalt of the cationic electroconductive resin and the anionic electroconductive resin interposed between both the electroconductive resin layers (a) and (b) in such a positional relationship that the polysalt layer (c) is adjacent to the electroconductive resin layers (a) and (b).

Abstract: Electrical winding assembly constructed by (A) winding an electrical conductor into a plurality of radially-spaced layers about an axis, (B) disposing electrical insulating sheet material, which has dry, heat-reactive resin material disposed at discrete areas on at least one side thereof, between the layers of the electrical conductor, (C) applying a slurry formed of solid, heat-reactive resin particles suspended in a non-aqueous liquid carrier, wherein the liquid is chemically inert for the resin particles suspended therein so as not to dissolve or enter into a reaction with the resin, at predetermined locations between certain of the layers of the electrical insulative material and the electrical conductor and (D) heating the electrical winding assembly at a predetermined temperature for a predetermined period of time sufficient to volatize the non-aqueous liquid carrier and to cause the resin on the electrical insulative material and in the slurry to soften and form cohesive bonds between adjacent layers o

Abstract: A process for producing cellulosic products which are particularly suitable for use as electrical insulators. The product is produced by creping base paper or stock and thereafter calendering the paper so that its final density is equal or greater than its starting density. The resulting creped product desirably has a density in the range from 0.8 to 1.2 grams per cubic centimeter, an increased Gurley densometer reading and has such mechanical and electrical properties as flexibility, extensibility and insulative effect.

Abstract: A process for impregnating capacitors with a gas absorbing impregnant is disclosed including the steps of purefying a phthalate ester by adsorptive filtration and adding 5 to 30% by volume of an alkene having from 10 to less than 20 carbon atoms and 0.1 to 10% by volume of an epoxy stabilizer to the phthalate ester prior to impregnating the capacitor.

Abstract: A laminar triplex structure for use in the manufacture of electrical cells and batteries, cells and batteries made therefrom, and methods of making the same. The laminate comprises a thin flat sheet of separator material, a layer of metallic particles on one surface of the separator sheet and adhered thereto with a binder, and a layer of conductive plastic adhered to the layer of metal particles. The laminate is made by the process of coating a dispersion of metal particles in a solution of a polymeric binder in an organic solvent over the separator, drying to remove the solvent, coating over the dried metal layer with a dispersion of conductive particles in a solution of a polymer in an organic solvent, and drying to remove the solvent.

Abstract: An electrographic recording material comprising a conductive sheet support coated with an electrically insulating layer comprising an intimate blend of a polymeric binder and up to 500 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder comprises from about 50 to about 90 parts by weight of a styrene interpolymer or a vinyl acetate polymer and a low molecular weight polystyrene or poly(.alpha.-methylstyrene) of relative viscosity determined at 25.degree. C. in ethyl acetate at a concentration of 2 grams per 100 ml of solution in the range of about 1.04 to about 1.15. The electrographic recording material exhibits improved toner adhesion and reduced toner smear.

Abstract: The charge accepting capacity of electrographic dielectric coatings is improved by dispersing in an organic solvent-soluble thermoplastic insulating resin having carboxyl functionality providing an acid value of from 5-100, from 0.05-3% by weight of calcium oxide or calcium hydroxide.

Abstract: An electrosensitive recording sheet consists of an electroconductive material of cuprous iodide, an electrosensitive color forming material, a binder and a support. A color forms in the recording sheet in response to an electric signal when an electric current flows therein. The cuprous iodide is whitened by adding an alkaline substance thereto, so as to only slightly increase the resistance of the cuprous iodide and to increase the contrast of recorded mark and the ordinary appearance of the recording sheet.

Abstract: A method of reproducing in an electrostatic copying apparatus a portion of an entire master pattern comprised of toner deposited on an electrostatic latent image onto a reproducing medium. The reproducing medium, itself, is an insulative sheet material which has a copy surface on which the selected portions will be reproduced. At least one first transparent conductive film is deposited on the back side of the copy surface of the sheet material in the area corresponding to the portion of the master pattern which will not be reproduced, and at least one second transparent conductive film is deposited along only one end of the sheet material on the same side of the material as the first conductor film. Finally, a third transparent conductive film connects the first and second films to each other. The method of producing on this reproducing medium begins by feeding one end of the sheet material opposite the end containing the second conductive film into the electrostatic copier.

Abstract: A process for producing an electrostatic recording material which comprises kneading a hydrophobic pigment having a critical surface tension of 50 dynes/cm or less with an aqueous dispersion of a copolymer consisting of (I) 10 to 50% by weight of methacrylic acid, (II) 5 to 50% by weight of a alkenyl aromatic compound and (III) 30 to 85 % by weight of at least one member selected from the group consisting of conjugated diolefins, alkyl acrylates and alkyl methacrylates; having a glass transition temperature (Tg) of 40.degree. C or less; and having an intrinsic viscosity [.eta.] of 0.1 to 1.0 dl/g as measured in tetrahydrofuran at 25.degree.

Abstract: Electroconductive paper useful typically in making copies by an electrostatic process may be made by incorporating therein NaCl and a polymer consisting of units derived from diallyl dimethyl ammonium chloride.

Abstract: An electrostatic recording material having a good workability and a very good recording characteristic is prepared by coating such a base sheet as paper, plastic film, metal plate, etc. with an aqueous dispersion comprising (A) 100 parts by weight of at least one water-insoluble polymer comprising at least one monomer selected from ethylenic monomers and conjugated diolefinic monomers, and (B) 1-200 parts by weight of at least one water-soluble salt of polymer containing carboxyl groups by means of an air knife coater, roll coater, etc. It is possible to use not more than 6 parts by weight of the heretofore well-known nonionic emulsifier and/or the well-known anionic emulsifier together with said component.

Abstract: An electrically conductive fibre formed from a thermoplastic organic polymer and having a zero or positive temperature coefficient of resistance. It is produced by the sequential steps of embedding and/or dispersing electrically conductive carbon particles into an outer region of the fibre, removing at least some of any free, unadhered carbon particles, if any are present, from the surface of the fibre by washing, and heating the fibre to a temperature whereby its temperature coefficient of resistance becomes zero or is converted to a positive value.

Abstract: This invention relates to an electrosensitive marking blank having a blushed conductive layer and a pigment containing blushed masking layer. The instant electrosensitive element has particular utility in that a relatively thin masking layer in combination with a blushed conductive layer results in a blank having improved whiteness and contrast characteristics.

Abstract: Acidic hydrosols are provided for forming an electrically insulating and corrosion resistant coating on a substrate which consumes a minor quantity of acid from said hydrosol, said substrate being selected from the group consisting of metals higher than hydrogen in the electromotive series, porcelain, glass, wood, paper, cotton, plastics and hydrateable oxides.The hydrosols of this invention are formed by admixing water, an acid such as phosphoric acid, or nitric acid, or hydrochloric acid or acetic acid or mixtures thereof, a metal silicate or hydrous magnesium silicate, and optionally, a magnesium compound and a boron compound. A significant feature of the present hydrosols is their water-white clarity and resistance to deterioration or decompositin for at least 15-20 minutes, and their ability to deposit a substantially uniform coating virtually instantaneously upon said substrates when placed in contact therewith.

Abstract: Disclosed is electroconductive paper adapted particularly for use in the manufacture of paper used in the electrophotographic reproduction of images.

Abstract: Reaction products between monomeric epichlorohydrin and a tertiary amine when applied to the surface of a substrate, such as paper, produce an electroconductive surface useful in electrographic image reproduction. Both a coated paper product and a process of producing it are provided.

Abstract: A recording medium having a recoding layer, a conductive layer and a base body is disclosed which is provided with a conductive electrode on a portion of the surface of recording layer in such a manner as not to be in direct contact with the conductive layer.

Abstract: The electrostatic recording material comprises an electroconductive transparentized base sheet having a dielectric layer thereon. The transparentized base sheet is obtained by subjecting to a transparentizing treatment with moisture, heat and pressure a fibrous matrix sheet of a mixture of natural pulp with synthetic pulp formed of a blended polymer system consisting essentially of polyvinyl alcohol-acrylonitrile copolymer and acrylonitrile-styrene copolymer.

Abstract: An electrostatic recording element comprising a conductive layer and a surface layer electrostatically chargeable upon application of an electric field, said surface consisting of an upper recording layer and a lower insulating layer, and said recording layer containing highly insulating hydrophobic resin and an elevated amount of inorganic or organic pigment whereas said insulating layer either consisting solely of highly insulating hydrophobic resin or containing only a small amount of said pigment together with said resin which is scribable or stampable with water-soluble ink without deteriorating the recording characteristics and is at the same time capable or preventing fingerprints, and which can further be utilized as a lithographic printing plate.

Abstract: Novel ionene polymers are formed by the Mannich reaction of an aromatic molcule having an electron withdrawing group with a lower aliphatic aldehyde and a lower aliphatic secondary amine followed by polymerizing the Manniched derivative by the use of chain extenders from the group of di-functional condensation monomers consisting of epihalohydrins and 1,4-dihalobutene-2. Additionally, the polymers may be prepared by substituting some or all of the secondary amines above with a primary amine and quaternizing the resultant polymers formed to increase the molecular weight of the product.The products of this invention have utility as polymers useful for water clarification and as emulsion breakers for water-in-oil or oil-in-water emulsions.These polymers and their quaternary salts have also a special utility here as an electroconductive coating which, when applied to paper specially as a substrate, produce an electroconductive surface adapted for electrographic printing.

Abstract: A porous, electrical insulating adhesive substrate is made by (A) electrostatically coating a flexible sheet material with heat reactive adhesive resin particles, having an average particle size of between about 1 micron to 2,000 microns, the adhesive particles are applied in a predetermined pattern on the sheet covering from about 10 percent to 90 percent of the sheet material area, the area between the resin pattern not being patterned and then (B) heating the patterened coated sheet material between about 65.degree.C to 250.degree.C, forming a discontinuous, 0.25 mil to 25 mil (0.006 mm to 0.

Abstract: This invention is directed to electroconductive paper and to the processes for preparing same which comprises a substrate containing an effective amount of an electroconductive water soluble, quaternary ammonium polymer. The polymer is prepared by reacting substantially stoichiometric amounts of at least one aromatic ditertiary amine and one or more anion-containing organic compound. The polymer is applied to the substrate, e.g. paper by conventional methods to obtain a coated surface characterized as having a resistivity of less than about 10.sup.11 ohms per square centimeter at relative humidities ranging from about 10% to 90%.

Abstract: An electrostatic recording sheet is produced by coating the opposite surfaces of a paper sheet with an electroconductive coating composition including a cationic polymer electroconductive agent and a cationic sizing agent to form electroconductive layers and further coating one of said electroconductive layers with a dielectric coating composition in the form of an aqueous polymer dispersion to form a recording layer via a penetration resist layer. The penetration resist layer is formed of a gelated material produced by an ionic reaction on contact of said aqueous polymer dispersion with said electroconductive layer.

Abstract: An electrostatic recording material having excellent recording characteristics is obtained by coating an electrically conductive substrate with a coating composition comprising an insulating polymer and pigment particles on which is adsorbed a fatty acid having at least five carbon atoms, ester or salt thereof, or resin acid or salt thereof.

Abstract: An electrophotographic paper based on a flat surface bond type paper is given a photoconductive coating to one side of the paper and is cockled afterward. This "post" cockling process can be done on a suitable web roll during production of the coated electrophotographic stock, or an electrographic or electrophotographic copy sheet can be cockled or embossed after imaging, toning and fixing by a conventional electrophotographic apparatus.

Abstract: In an electrostatic recording material comprising an electroconductive base sheet and a dielectric layer supported thereon, the electrostatic recording material being characterized in that the dielectric layer contains 10 to 70 wt.% of non-conductive and non-photoconductive finely divided powder coated with organopolysiloxane.

Abstract: A method of forming an electrophotographic coating which includes preparing a mixture which comprises finely divided photoconductive material dispersed in an organic resin binder. The resin, which exhibits an acid value of at least 3, or a hydroxyl value of at least 15, is heat-treated for a time and temperature enclosed within the area ABCDEFGH of the temperature-treating diagram shown in the accompanying drawing. Following this treatment, the mixture is dissolved in a volatile solvent for the binder resin, and the dispersion is coated onto a conductive backing to form a substantially uniform layer.

Abstract: A separator for a galvanic element wherein partially fused glass fibers are coated by a coating consisting of grains of thermo-hardening synthetic material immersed in a natural or synthetic latex to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.

Abstract: A support for electrophotographic material and electrostatic recording material which is improved in solvent resistance and electroconductivity can be produced by firstly fixing an anionic sizing agent into an untreated paper and then fixing a cationic high polymer electroconducting agent into thus treated paper or coating the same thereon. Preferably, the first step is carried out by size pressing.

Abstract: A porous, electrical insulating adhesive substrate is made, by uniformly coating a flexible, porous sheet material with adhesive resin particles having an average particle size of between about 37 to 420 microns, the adhesive coating covering from about 5 to 50 percent of the sheet material area in a non-patterned random distribution, and then heating the coated sheet material between about 85.degree. to 250.degree.C, forming a discontinuous 0.