Abstract: An electrographic recording material comprising a conductive paper support coated with an electrically insulating layer comprising an intimate blend of a vinyl ester interpolymer latex and up to 500 parts of an inert finely divided pigment per 100 parts by weight of latex interpolymer. The vinyl ester interpolymer comprises about 3 to about 7 weight percent of carboxylic acid groups supplied by an interpolymerized C.sub.4 -C.sub.10 vinylene monobasic carboxylic acid monomer.

Abstract: A process for the preparation of hard paper involves impregnating lengths of cellulose-containing material with plasticizer-containing mixture of a phenol-resol resin solution and cresol-resol resin solution according to a one-step method, subsequent drying, and then hardening of the resin-impregnated paper. The impregnating solution employed is a mixture of a 50-80% by weight phenol-resol resin solution with a 40-70% by weight cresol-resol resin solution, to which has been admixed, before impregnation, a plasticizer and additional water. The water is added in amounts of 4-12% by weight, based on the sum total weight of solid resins and plasticizer in the total solution mixture.

Abstract: An electrostatic recording medium comprising a support, a conductive layer formed on one surface of the support and made of zinc oxide dispersed in a combination of a cationic polyelectrolyte and a non-conductive binder resin, and a dielectric layer formed on the conductive layer. The cationic polyelectrolyte is contained in an amount of not smaller than 30% by weight of the total of the polyelectrolyte and the binder resin.

Abstract: An electrostatic record material comprising an electroconductive base sheet and a record layer formed on the base sheet and composed mainly of insulating resin, the record material being characterized in that the electroconductive base sheet has an electroconductive layer comprising (1) electron conductive particles produced by coating the particles of an inorganic compound with an electroconductive substance consisting of stannic oxide and a small amount of antimony and (2) a water-soluble adhesive composed of salts of a copolymer of at least 20 mole % of acrylic acid or methacrylic acid monomer.

Abstract: A battery separator having a low electrical resistance after extended use is made by thermal consolidation and thermal embossing of a paper web formed from a furnish containing a synthetic pulp the fibrils of which are filled with an inorganic filler, the web incorporating a wetting agent which is preferably an organic sulphonate, and organic succinate, or a phenol ethoxylate.

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 from about 200 to about 1000 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder is a low molecular weight interpolymer comprising interpolymerized monovinyl aromatic monomer, a C.sub.3 -C.sub.7 allylic alcohol and optionally an ester of a C.sub.3 -C.sub.7 allylic alcohol and a monovalent carboxylic acid.

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 from about 200 to about 1000 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder contains a major proportion of a low molecular weight interpolymer comprising a monovinyl aromatic monomer, a C.sub.3 -C.sub.7 allylic alcohol and optionally a monocarboxylic acid ester of a C.sub.3 -C.sub.7 allylic alcohol, and a minor proportion of high molecular weight interpolymer.

Abstract: A reactive dielectric record material is disclosed which comprises certain chromogenic material and certain phenolic material. This record material produces images by means of a dielectric process wherein two color-forming agents contained within a reactive image-bearing surface are brought into reactive, color-producing contact by means of colorless toner material.

Abstract: An electrostatic recording element which is capable of forming clear images thereon independently from the temperature and humidity of the ambient atmosphere, and of being stored for a long period of time without deterioration thereof, which comprises:(a) a substrate comprising paper or a synthetic polymer film;(b) a conductive layer located on a surface of said substrate and comprising (1) powdered electroconductive zinc oxide which has been doped with a member selected from the group consisting of aluminium, copper and tin, and which has a specific resistivity of from 1.times.10.sup.-1 to 1.times.10.sup.2 ohm-cm, under a pressure of 150 kg/m.sup.2, (2) an organic fluorescent brightening agent in an amount of from 0.1 to 2.

Abstract: Electrically-conductive paper comprising a mixture of electrically-conductive fibers, wood pulp and synthetic wood pulp, the ratio between the two types of pulp being so selected that the electrical conductivity of the paper does not change appreciably with changes in ambient moisture. The conductive paper may be encapsulated within an electrically-insulating moisture barrier.

Abstract: The invention relates to a method for the manufacture of diaphragms of fibrous potassium titanate and an organic binder for electrochemical cells and has as the object to develop such a method in such a direction that it allows the manufacture of diaphragms which are relatively thin but have, at the same time, a sufficient long-term chemical and mechanical stability at high operating temperatures. According to the invention, provision is made for this purpose to apply potassium titanate, together with polytetrafluoroethylene and a styrene-butadiene copolymer, from a suspension, to a screen with a mesh width between about 0.1 and 0.4 mm. The diaphragms made by the method according to the invention are suitable particularly as cover layers in fuel cells with an alkaline electrolyte.

Abstract: This invention relates to a carrier material for photographic purposes which is formed of paper coated with a synthetic resin. The paper contains a water soluble inorganic salt that enhances its drying by microwaves. In a preferred embodiment, the paper contains starch.

Abstract: The present invention relates to a cellulose-based electric insulation material and to a process for producing thereof.The cellulose-based electric insulation material contains from 0.02 to 1.1 weight % of boron with respect to absolutely dry material. The process for preparing said cellulose-based electric insulation material resides in that a cellulose-based paper pulp is prepared and cast for sheet making, the obtained paper sheets being pressed and dried. One of said intermediate products, namely paper pulp or paper sheets is treated with a chemical reagent which is boric acid or a boron compound forming boric acid when reacting with water or mixtures thereof, said chemical reagents being taken in amounts ensuring the boron content in the end product from 0.2 to 1.1 weight % with respect to absolutely dry material.

Abstract: Electroductive article comprising a coating composition of copolymers containing from 70 percent to 85 percent by weight diallyldimethylammonium chloride and at least 15 percent but less than 30 percent by weight N-methylolacrylamide and optional comonomers is disclosed. These electroconductive polymers are coated onto a substrate and become water-insensitive thereafter.

Abstract: The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance.

Abstract: The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance.

Abstract: A laminated composite comprising a web of heat-resistant base material having a sufficient structural strength and a web of tiny mica flakes laid on said web of base material by multilayer-paper making. This composite can be manufactured with good operational efficiency, is improved in mica retention and is excellent in varnish-impregnability, heat-resistance, mechanical strengths and electric insulation.

Abstract: An electrostatic recording material comprising a support having formed thereon a dielectric layer composed of a terpolymer consisting of (a) methacrylic acid, (b) a monomer selected from the group consisting of (1) acrylic acid esters containing at least 4 carbon atoms and (2) methacrylic acid esters containing at least 5 carbon atoms, and (c) a monomer selected from the group consisting of (1) acrylic acid esters containing at least 4 carbon atoms and (2) methacrylic acid esters containing at least 5 carbon atoms, wherein monomer (b) and monomer (c) are different and at least one of the monomers (b) and (c) is an acrylic acid ester containing at least 11 carbon atoms or a methacrylic acid ester containing at least 8 carbon atoms, and a method for producing an electrostatic recording material, which comprises converting such a terpolymer to a water-soluble or water-emulsifiable salt of the terpolymer in which about 20 to 100 mol% of the carboxyl groups present form a salt with ammonia and/or a volatile amine,

Abstract: An electrical insulating material composed of a mica flake layer and a heat resistant base material layer is prepared by superposing the mica flake sheet containing at most 9% by weight of pulp-like particles of a heat resistant polymer based thereon on the heat resistant base material sheet, both of which sheets being dried, and heating them under pressure. The electrical insulating material has excellent in structural strength, varnish-impregnability, and is resist to pealing off of the mica flakes.

Abstract: An improved method for manufacturing a magnet paper sheet which comprises: thoroughly mixing about 70-90 parts by weight of magnetoplumbite barium ferrite powder and/or magnetoplumbite strontium ferrite powder essentially consisting of particles of primary particle size of about 0.1-2 microns and of secondary particle size smaller than about 20 microns, an anionic synthetic latex containing about 1-10 parts by weight in dry weight of a synthetic rubber and/or a synthetic resin such as SBR, NBR, polyvinyl acetate and polyacrylate, about 2-10 weight % of a cationic organic polymer electrolyte such as polyamine and polyethyleneimine based on the amount of the synthetic rubber and/or resin, and more than about 5 parts by weight of pulp fibers together into a slurry; forming the slurry into a paper sheet; and magnetizing the paper sheet.

Abstract: A photosensitive paper for electrophotography comprising a paper substrate, an electrophotographic photosensitive layer formed on one surface of the substrate and an electrically conductive coating layer formed on the other surface of the substrate, which electrically conductive coating layer comprises an electrically conductive binder medium and a fine powder of a fluorine resin distributed predominantly in the surface portion of the electrically conductive coating layer, is disclosed.This photosensitive paper is satisfactory in all of the following properties; adaptability to the paper feeding operation, the scratch resistance of the photosensitive layer, the blocking resistance and electric characteristics irrespective of the humidity conditions in the operation atmosphere.

Abstract: Electroconductive copolymers of diallyldimethylammonium chloride and at least 15 percent by weight acrylamide which exhibit improved solvent holdout.

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: Degradation of a liquid developer for developing electrostatic latent images is prevented by using a paper from which a rosin aluminum soap is not substantially eluted into the liquid developer when contacted therewith.

Abstract: A novel electrically insulating mica paper containing cellulose, but no binding agent and having a tensile strength and a porosity higher than those of pure mica paper is disclosed. The tensile strength is sufficiently high for the mica paper to be processed without backing. The novel mica paper contains mica pulp consisting of platelets of natural mica and 10 to 50% by weight, preferably 20 to 30% by weight, of cellulose fibres which preferably have a freeness of 20 to 60 on the Schopper-Riegler scale. It can be produced by adding cellulose fibres to mica pulp produced without using chemicals other than water and processing the mixed pulp by conventional methods to a paper, without using a binding agent, temperatures higher than 100.degree. C. or pressure.

Abstract: Copolymers useful in making electroconductive paper which impart improved solvent holdout properties to the electroconductive paper, comprising monomer units of quaternary diallyldialkylammonium and a monomer of the formula: --CH.sub.2 .dbd.C(R.sub.1)--C(O)--O--R.sub.2, where R.sub.1 is hydrogen or methyl; R.sub.2 is an alkyl group of 2 to 12 carbon atoms, that number being designated n, substituted with fluorine atoms in number equal to from n to 2n; and for the quaternary diallyldialkylammonium monomer, the alkyl groups are independently selected from alkyl groups of one to 18 carbon atoms, and the counterion is an anion.

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: A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.

Abstract: An electrostatic recording material, such as a dielectric coated paper and a paper for transfer of an electrostatic image, having a dielectric layer comprising a copolymer which comprises about 15 to 70 mol% of methacrylic acid and about 85 to 30 mol% of a methacrylate or acrylate and which contains free carboxylic acid groups, and a process for producing the electrostatic recording material comprising coating a water-soluble or -emulsifiable ammonium or amine salt of the copolymer on a support and drying the coated support.

Abstract: The herein-disclosed electrical insulating paper is well-suited to the insulation of extra-and ultra-high-voltage oil-filled electric power cable, and comprises at least one layer (A) which is a mixture of polypropylene fibers and kraft pulp and at least one layer (B) of accumulated polypropylene fibers laminated to the layer (A) by fiber-to-fiber bonding of the polypropylene fibers. The electrical insulating paper is prepared by superposing at least one layer of a mixed paper of polypropylene fibers and kraft pulp and at least one layer of polypropylene web, and heating the superposed layers at a temperature of 110.degree. to 180.degree. C to thermally laminate the layers each other.

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: Porous carbon sheets suitable for use as fuel cell electrode support plates are produced by stabilizing acrylic filament precursors through the controlled addition of oxygen thereto. The stabilized filaments are thereafter chopped into short lengths, felted and pressed into sheets with the pressing step being performed at a temperature determined by the oxygen content of the stabilized filaments. The sheets are thereafter pyrolyzed to produce the desired porous substrate material.

Abstract: Pulp particles consisting essentially of 50 to 90% by weight of mica particles and 50 to 10% by weight of polyamide-imide, said polyamide-imide forming a continuous phase in which said mica particles are dispersed discontinuously.A paper-like sheet comprising an integrated intimate mixture of 20 to 95% by weight of the pulp particles and 80 to 5% by weight of staple fibers of a thermally stable polymer.

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

Abstract: Disclosed is a novel paper sheet adapted for the electrostatographic reproduction of images on both sides thereof. The paper bears a surface sizing material having dispersed therein a plurality of microcapsules comprising water or a hydrated salt encased in an impervious capsule wall of a solid material. As the paper is subjected to the electrostatographic fusing operation, water is released from the microcapsules to replenish that lost due to the heat of fusing. In this manner, the paper can be imaged on its other side without encountering the problems associated with dehydration of the paper.

Abstract: An improved electroconductive resin composition is obtained by using a water-dispersible, film-forming acrylamide polymer as a binder and extender for a water-soluble quaternary ammonium electroconductive resin. Particularly useful is a self-binding blend of about 65-95 wt. % polyvinylbenzyltrimethylammonium chloride and about 5-35 wt. % nonhydrolyzed polyacrylamide which can be formulated as an aqueous dispersion with clay or other printing pigments. Applied to a nonmetallic substrate, such as paper or an organic polymer film, the improved electroconductive resin composition reduces the surface electrical resistivity of the substrate and also provides improved holdout to aromatic and aliphatic solvents.

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: This invention relates to di-olefinically unsaturated compounds which contain two quaternary ammonium moieties. Polymers and copolymers of these polyfunctional compounds are characterized by high charge density, and find application as flocculants, paper sizes, and electroconductive coatings.

Abstract: Polyolefin fibers containing at least 70% by weight of polypropylene fibers having a denier of at least 0.5 and a birefringence of at least 2.5 .times. 10.sup.-.sup.2 are formed into a sheet. The sheet is then frictionally calendered in the dry state at a frictional ratio of at least 15% and at a temperature in the range from 90.degree.C to 160.degree.C whereby an insulating paper having excellent air-impermeability and oil-resistance is obtained.

Abstract: A diaphragm is disclosed for electrolytic cells, for example, chlor-alkali cells. The diaphragm is characterized in that it has been treated with a water-soluble silicate on the anolyte side. Also disclosed is an electrolytic cell process using such a diaphragm, and a method for preparing such a diaphragm.

Abstract: A novel process for producing a thin flexible self supporting boron nitride felt comprising the following steps .[...]..Iadd.: .Iaddend.A. purifying boron nitride fiber by washing with water and subsequently extracting with an aliphatic alcohol containing from 1 to 3 carbon atoms.Iadd.;.Iaddend.B. forming a mat from the fibers in step A and incorporating therein an aqueous solution of an inorganic water soluble binder selected from the group consisting of water soluble halides, nitrates, nitrites and carbonates of the alkali metals, the alkaline earth metals, the Group III A metals and their mixtures; andC. drying the resulting binder.Iadd.-.Iaddend.containing mat obtained from step (B) at a temperature below the melting point of the salt.