Abstract: Improved electrical devices such as transformers, and capacitors containing an improved dielectric fluid consisting essentially of a major amount of a liquid polyorganosiloxane and a minor amount of cumene, methyl cinnamate or carbon disulfide are disclosed.

Abstract: A dielectric composition comprising ethylene polymer and effective amounts, as a water treeing inhibitor, of at least one epoxy containing organo silane.

Abstract: Cured insulation compositions are rendered freely strippable from the encased conductors through the use of small amounts of (a) a dialkyl tin diester, (b) N,N'-ethylene bis-stearamide or similar waxy composition, and (c) certain 3-amido-1,2,4-triazoles.

Abstract: Low density polyethylene with a very small proportion of low molecular weight polyethylene (e.g. such as can be extracted by washing by ethanol) is used as an insulation material for high voltage power cable.

Abstract: An improved electrical grade concrete insulator is prepared from a mixture of aggregate, a hydantoin epoxy resin and, optionally, cement.

Abstract: Flexible polyvinyl chloride insulation for wire is made conductive at elevated temperatures activating a sensing conductor and eliminating thermostatic controls. Conduction through the insulation is imparted by adding compounds such as nonylphenoxy poly (ethyleneoxy) ethanol, certain metallic salts of alcohol sulfates, mixed ortho, parasulfonamides, and liquid crystal compounds.

Abstract: A wire enamel coating composition capable of forming an insulative coating on a wire to provide a solderability of less than 1 second at temperatures as low as 285-315.degree. C and a thermoplastic flow temperature of at least 230.degree. C comprising a predetermined ratio of an imidized polyester resin having a free hydroxyl content of 4-10% by weight and a blocked isocyanate; at least one aromatic solvent, and a catalyst.

Abstract: A wire enamel coating composition capable of forming an insulative coating on a wire to provide a solderability of less than 1 second at temperatures as low as 285.degree.-315.degree. C. and a thermoplastic flow temperature of at least 230.degree. C. comprising a predetermined ratio of a polyurethane ester resin having a free hydroxyl content of 4-10% by weight and a blocked isocyanate; at least one aromatic solvent, and a catalyst.

Abstract: An improved dielectric system for an electrical apparatus. The dielectric system includes a polymeric film impregnated with low molecular weight polybutene having an average number molecular weight in the range of 300 to 500. The dielectric system has improved dielectrical properties and the polybutene is biodegradable which minimizes the pollution of the atmosphere if the dielectric liquid is exposed to the atmosphere. Further extended service life can be achieved by the addition of a cyclohexyl amine to the liquid dielectric.

Abstract: Electrical devices such as transformers and capacitors containing divinyltetramethyldisiloxane or methylvinylcyclosiloxanes as dielectric fluids are disclosed.

Abstract: Organosilicon pastes comprised of from about 5 to about 30 parts of inorganic fillers, and from about 0.1 to about 2.5 parts of ultraviolet radiation absorption effective organic compounds, per 100 parts by weight of oily diorganopolysiloxane polymers are disclosed, which pastes are particularly useful for the protection of electrical insulators.

Abstract: A refractory, granular electrically insulative composition useful as an embedding composition for electric heating coils comprises fused and granulated, possibly ground, difficultly fusible, ceramic and possibly oxide-ceramic material having polyalkylsiloxane, e.g. polymethylsiloxane, or polyarylsiloxane admixed in a proportion of from 0.5 to 5.0% added weight. Use of the composition is suitable with tubular heaters which have been produced with it and which, after manufacture and before being brought into use, have been subjected to a heat treatment at a temperature of at least 65.degree. C, for a period of at least 10 minutes. An electrical heating element comprises a housing which is embedded in the composition wherein the ceramic and possibly oxide-ceramic material has been ground.

Abstract: Electrical devices such as transformers and capacitors containing certain silacyclopentenes as dielectric fluids are disclosed.

Abstract: An improved high voltage insulating material comprising one or more polymers and an anti-tracking and erosion inhibiting composition comprising a hydrate of alumina and one or more compounds selected from the groups consisting of nickel phosphate, phosphinic acid or a derivative thereof, phosphonous acid or a derivative thereof, and phosphonic acid or a derivative thereof. The composition functions to prevent failure by tracking and to substantially retard failure by erosion.

Abstract: Flexible polyvinyl chloride insulation for wire is made conductive at elevated temperatures activating a sensing conductor and eliminating thermostatic controls. Conduction through the insulation is imparted by adding compounds such as nonylphenoxy (ethyleneoxy) ethanol, certain metallic salts of alcohol sulfates, mixed ortho, parasulfonamides, and liquid crystal compounds.

Abstract: An electrically insulating composition especially adapted for insulating terminations or splices of oil-impregnated cables comprises an electrically insulating organic liquid and a reactive thickening agent. Initially the composition is a liquid having a low viscosity permitting it to be conveniently poured into place in a termination housing or splice casing. After reaction of the thickening agent, the composition thickens to prevent undesired drainage of the composition.

Abstract: Liquid crystal substances or compounds of the formula ##STR1## wherein R is as hereinafter set forth, as well as compositions and electro-optical apparatuses containing them are described.

Abstract: Liquid crystal substances or compounds of the formula ##STR1## wherein R is as hereinafter set forth, AS WELL AS COMPOSITIONS AND ELECTRO-OPTICAL APPARATUSES CONTAINING THEM ARE DESCRIBED.

Abstract: A high voltage insulation polyolefin base is provided with a stabilizing amount of a wetting agent containing a perfluoro-alkyl group as a stabilizer to improve the voltage stability of the polyolefin base.

Abstract: There is disclosed an oil impregnated electric device in which an element of the device is impregnated with a mixture of an arylalkane compound such as 1,1-phenylxylyl ethane and an organic phosphorus compound such as phosphate or phosphite. Such electric device has a high power density (i.e., capable of withstanding high electric field) and a high reliability.

Abstract: The present invention relates to electrical insulating compositions based on olefin polymers and a specific azomethine containing a naphthalene nucleus and serving to increase the long-term dielectric strength. The insulating compositions of the invention are particularly suitable for cables, especially high-tension cables.

Abstract: Liquid dielectric compositions useful as electrical insulators are comprised of [1] a liquid dielectric component of known type, in combination with [2] at least one member selected from the group consisting of monocyanophenoxybenzene, monocyanodiphenyl and monocyanoterphenyl.

Abstract: A composition consisting essentially of a specific siloxane fluid and a specific type of filler is disclosed to be useful as an electrical coating particularly where arc track resistant characteristics are needed.

Abstract: A wire enamel coating composition capable of forming an insulative coating on a wire to provide a solderability of less than 1 second at temperatures as low as 285.degree.-315.degree. C and a thermoplastic flow temperature of at least 230.degree. C comprising a predetermined ratio of a polyurethane ester resin having a free hydroxyl content of 4-10% by weight and a blocked isocyanate; at least one aromatic solvent, and a catalyst.

Abstract: There is disclosed a method for improving and controlling the charge retention of plastic materials. Various such materials and their applications are also disclosed.

Abstract: Improved electrical devices such as transformers, and capacitors containing an improved dielectric fluid consisting essentially of a major amount of a liquid polyorganosiloxane and a minor amount of certain selected ketones which are soluble in said siloxane are disclosed.

Abstract: A stationary electric device such as, for example, a capacitor and a transformer, using linear phenylmethylsilicone oil as an impregnating oil is provided. The use of linear phenylmethylsilicone oil improves an anti-corona property as well as permits the miniaturization of the device.

Abstract: An insulating coating composition is described which prevents deterioration of the insulating ability of newly fabricated material and when applied will also restore insulation characteristics to material presently in use. The composition comprises a mixture of1. a main resinous coating of a thermoplastic resin;2. a cation exchange resin which may be either strongly acidic, i.e., one containing sulfur type, sulphonic acid radicals or weakly acidic, i.e., one containing carboxyl groups or phenolic hydroxyl groups; and3. an anion exchange resin which may be either strongly basic, i.e., one containing quaternary ammonium radicals or weakly basic, i.e., one containing amine radicalsA method of arresting or preventing deterioration of insulating coatings is also disclosed by the use of the above materials which when applied will remove disassociated ions which, in turn, prevent formation of an electroconductive film on the surface of the coating.

Abstract: An insulating oil for use in electrical devices, comprising a mixture of trixylenylphosphate and 10% to 40% by volume of insulating oil having a viscosity of 5 cp to 15 cp at 30.degree.C and selected from the group consisting of mineral oil, alkylbenzene, alkylnaphthalene, diallylalkane, 2-diphenylmethylether, 2-diphenyl-isopropylether, paraffin hydrocarbon oil and naphthene hydrocarbon oil.

Abstract: New polymeric materials containing sulphone groups in the polymer chain are particularly suitable for moulding to give strong transparent products of high softening point and may be used as electrical insulants in condensers.

Abstract: Electrical capacitors are impregnated with liquid dielectric compositions comprising mixtures of diaryl sulfones and esters of carboxylic acids.

Abstract: Electrical capacitors are impregnated with liquid dielectric compositions comprising mixtures of diaryl sulfones and halogen-free aromatic organic compounds.

Abstract: Thermally and oxidatively stable perfluorinated tertiary amines of the formula: ##EQU1## ARE DISCLOSED, AS WELL AS THE PROCESS FOR MAKING THESE AND OTHER COMPOUNDS. The carbonyl group of imides or amides is reduced with SF.sub.4 using HF as the reaction solvent at a reaction temperature of 25.degree.-300.degree.C. Cyclic imides can be used as starting compounds, and tertiary amines containing unsaturated moieties can be produced.The perfluorinated tertiary amines have various uses in view of their high degree of thermal and oxidative stability, including uses as hydraulic fluids or transformer dielectric fluids.

Abstract: Cellulose material having improved resistance to thermal deterioration and having particular application as insulation material for electrical apparatus. The cellulose material is treated with an aqueous dispersion of a liquid, uncured, crosslinkable thermosetting resin, such as an epoxy resin, and a water soluble, nitrogen-containing compound. During curing of the resin, the cellulose molecules are believed to enter into the crosslinking reaction to provide a treated cellulosic product capable of withstanding the deteriorating action of heat over extended periods of time. A protein material, such as casein or isolated soy protein, can be added to the treating liquid and the protein not only contributes additional nitrogen groups to the treating media to further increase the thermal stability of the cellulose, but also acts as a film former. The thermal stability of the cellulose material can be further improved by the addition of an organic amine, such as melamine, to the treating liquid.

Abstract: An electrically insulating composition adapted for the encapsulation of a miconductor body and for protecting the semiconductor surface against harmful impurities, comprising a mixture of a polymerizable organic resin, at least one filler which improves the electrical properties of the semiconductor body, and at least one organic chelating agent capable of binding undesirable impurities in said resin and in said filler.