Abstract: The present invention is directed to an improvement in a wire or cable system comprising a wire or cable portion, an insulation composition surrounding the wire or cable portion, a filler material surrounding the insulation composition and a jacket composition surrounding the filler material wherein either the insulation composition, the jacket composition, or both comprise at least one antioxidant, wherein the improvement comprises the inclusion in the filler material of a stabilizing mixture comprising at least two antioxidants, selected from at least two members of the group consisting of:(a) metal dithiocarbamate salts,(b) amine antioxidants, and(c) sterically hindered phenolic antioxidants,wherein the stabilizing mixture is present in the filler material in an amount that is effective for the reduction of the oxidation of the cable filling material, thereby reducing deterioration of the jacket and/or insulation.

Abstract: Novel dielectric liquids for such electrical components as transformers, capacitors and cables, especially adopted for low temperature applications, comprise immixtures of benzyltoluene, (methylbenzyl)toluene, benzylxylene and (methylbenzyl)xylene, and optionally include the benzyl or methylbenzyl derivatives thereof; these immixtures are facilely prepared by chlorinating a mixture of xylene and toluene and then adding a catalytically effective amount of a Friedel-Crafts catalyst to the medium of chlorination.

Abstract: A method for enhancing the dielectric properties of a new or in-service electrical cable is disclosed, the method comprising supplying the interstitial void space of the cable's conductor with a fluid mixture comprising(A) an antitreeing agent; and(B) a water-reactive compound,wherein (B) has a diffusion coefficient of at least 1.times.10.sup.-7 cm.sup.2 /second at 50.degree. C. in the insulation of the cable and the mixture has an initial viscosity of .ltoreq.100 cP at 25.degree. C. The instant method provides a more symmetrical distribution of dielectric enhancing fluid in the insulation than prior art fluids and results in a significant reduction in cable treatment time.

Abstract: An insulating oil comprising dibenzylbenzenes which is most suitably used for impregnating a metallized plastic film capacitor, is produced by the reaction of benzene or toluene with diphenylmethane or a methyl derivative thereof at 170.degree. C. to 400.degree. C. in the presence of a synthetic crystalline zeolite catalyst having a molar ratio of SiO.sub.2 to Al.sub.2 O.sub.3 of 20 or above, wherein the inlets of main pores are constituted of ten-membered oxygen rings.

Abstract: An electrical insulating oil composition which comprises 45% by weight or more of at least 2 members selected from the group consisting of (a) m-ethylbiphenyl, (b) p-ethylbiphenyl, (c) o-benzyltoluene, (d) m-benzyltoluene, (e) p-benzyltoluene, and (f) 1,1-diphenylethane; and the remainder of non-condensed bicyclic aromatic hydrocarbons having not more than 17 carbon atoms besides the above 6 components; and is characterized in that, when the temperature of the composition is -40.degree. C., (I) the total quantity of solid phase obtained by calculating according to the following solid-liquid equilibrium equation is 45% by weight or less relative to the total quantity of the composition, and (II) in the liquid phase composition calculated by the following solid-liquid equilibrium equation, the total quantity of the compounds (a) to (f) is 40% by weight or more and the viscosity of this liquid phase is 500 cSt or lower, ##EQU1## wherein X.sub.

Abstract: The present invention relates to an improved electrical insulating oil composition which has excellent electrical characteristics and is suitable for use in impregnating electrical appliances in which plastic dielectric material is used, and further relates to electrical appliances impregnated with such a composition. The electrical insulating oil composition is produced by bringing a by-product oil fraction mainly containing components having boiling points in the range of 260.degree. to 330.degree. C. (atmospheric pressure basis) into liquid-liquid contact with an organic polar solvent; said by-product oil fraction being formed by alkylating benene or toluene with ethylene in the presence of an alkylation catalyst and then distilling the alkylation product; and said electrical insulating oil composition being characterized in that the ratio of the integrated intensity as chemical shift at 120 to 155 ppm of the spectrum measured by .sup.

Abstract: A silicone base oil for use as impregnant in an electric power cable for fire hazard conditions is rendered non-gassing by the addition of about 2-8% of an aryl alkane having at least two benzene rings spaced apart by not less than one nor more than two aliphatic carbon atoms. The total number of aliphatic carbon atoms in the molecule is limited to six, and the silicone oil should be chosen with a sufficiently high flashpoint for the whole oil to have flashpoint above 150.degree.C. The preferred additive is 1-phenyl 1-(3,4 dimethylphenyl) ethane, also known as PXE.

Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.

Abstract: A direct current electric cable with a conductor, a semi-conductive screen around and contacting the conductor, a plurality of layers of insulation formed by tapes of insulating material around the semi-conductive screen, a further semi-conductive screen around the layers of insulation and a metal sheath around the further semi-conductive screen, the layers of insulation being impregnated with a non-migrating, insulation composition having a dropping point temperature at least 5.degree. C. above the maximum operating temperature of the cable and having an electronegative gas dissolved therein, the gas having a coefficient of diffusion in the composition in the range from 3.times.10.sup.-5 to 3.times.10.sup.-6 cm.sup.2 /sec at temperatures below the dropping point temperature of the composition.

Abstract: An insulating oil containing N,N-bis(2-hydroxyethyl)-N-cyclohexylamine at 0.5 mg/l or more. An electrical apparatus is filled with the insulating oil in which a copper component is immersed. During operation of the apparatus for a long period of time, the tan .delta. of the insulating oil does not increase so that deterioration of the insulating oil is deferred, thereby substantially extending the life of the insulating oil.

Abstract: An electrical insulating oil which is suitable for use in impregnating electrical appliances such as capacitors, cables and transformers, especially those in which plastic materials are used partially or totally as dielectrics or insulating materials, and electrical appliances that are impregnated with the above electrical insulating oil. The electrical insulating oil of the invention contains at least one monoolefin and/or diolefin having three condensed or non-condensed aromatic rings.

Abstract: Dielectric fluid is prepared by combining perchloroethylene with an aliphatic hydrocarbon having 7-9 carbon atoms in the aliphatic chain. The resulting dielectric has improved freezing point and nonflammability characteristics.

Abstract: Di octyl phthalate (DOP) is used as a dielectric fluid for a-c electrical capcitors. An additive of an epoxidized linseed oil in an amount from 0.1% to 30% by weight of DOP stabilizes the capacitors and thus prolongs their life.

Abstract: An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil can be produced inexpensively but has excellent electrical characteristics and it comprises a fraction having boiling points in the range of 350.degree. to 450.degree. C. that is prepared by disproportionating diarylalkane or a hydrocarbon mixture mainly containing the same at temperatures in the range of 20.degree. to 500.degree. C. in the presence of a disproportionation catalyst, said diarylalkane having boiling points in the range of 260.degree. to 320.degree. C.

Abstract: An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil has a low viscosity, low pour point and other excellent electrical characteristics and it comprises an isomer mixture of dibenzylbenzenes in which the quantity of p-dibenzylbenzene is not more that 10% by weight and the weight ratio of m-dibenzylbenzene/o-dibenzylbenzene is not lower than 3.

Abstract: An electrical insulating oil which is suitable for use in impregnating electrical appliances such as capacitors, cables and transformers, especially those in which plastic materials are used partially or totally as dielectrics or insulating materials, and electrical appliances that are impregnated with the above electrical insulating oil. The electrical insulating oil of the invention contains at least one monoolefin and/or diolefin having three condensed or non-condensed aromatic rings.

Abstract: An improved electrical insulating oil which is stable in refining treatment and good electrical properties are maintained under high temperature conditions, and oil-filled electrical appliances impregnated therewith. The electrical insulating oil comprises 1,1,-diarylalkenes which are represented by the following general formula (I): ##STR1## wherein R.sub.1 to R.sub.4 's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.

Abstract: A grease compatible cyclic olefin extended polyurethane comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, a plasticizer having a total solubility parameter of between about 8.3 and 8.9 or about 9.1 and 9.7. Certain extended polyurethanes are characterized as being reenterable, such that they can be used for repairing, encapsulation or reclaiming electrical or telephone cables. Alternate formulations can be used as hard volume encapsulants for general elastomer use.

Abstract: An electrical insulating oil which can be produced easily at low cost, scarcely contains undesirable components of tarry substance, unsaturated compounds and carbonyl compounds, does neither swell nor dissolve plastic materials, and has excellent electrical properties. The electrical insulating oil is characterized in that it comprises a fraction having boiling points in the range of 270.degree. to 350.degree. C. which is prepared by distilling the heavier products obtained from the process for producing ethyltoluene by alkylating toluene with ethylene in the presence of synthetic zeolite catalyst. Included also in the present invention are oil-filled electrical appliances that are produced by impregnating them with the above insulating oil.

Abstract: An electric power cable insulating fluid which is a substance corresponding to the following formula ##STR1## where R is chosen between the following two radicals: ##STR2## and an electric power cable with its insulation impregnated with such fluid.

Abstract: Epoxy resin compositions including an epoxy resin, a hardener and an additive containing a rust preventing film forming component are provided. The additive is lanolin and/or a lanolin derivative. Optionally, the composition also includes a secondary additive selected from organosilicon compounds, organoaluminum compounds, organotitantium compounds, organotin compounds, liquid rubber having functional groups at both ends of the molecule, petroleum lubricating oils or Japan wax. These epoxy resin compositions, when used as encapsulating materials, prevent moisture and impurities from invading the surface of the device.

Abstract: Waterproof filling medium, used in telecommunication cables with cellular insulation of polyethylene or polypropylene, is based on a mineral oil (with or without a gelling agent such as microcrystalline wax) and includes two non-polar additives. The first is soluble and of low enough molecular weight to reduce significantly the osmotic pressure of the base, but does not diffuse into the insulation below 80.degree. C.; and the second is polymeric and of high enough molecular weight to increase the resistance to flow to obtain the required non-draining property. Filling of cells in the insulation is inhibited.

Abstract: A refined electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil is prepared by refining a mixture of unsaturated dimers of styrenes and alkylbiphenyls and/or alkylnaphthalenes, using a solid acidic substance.

Abstract: Capacitance loss is reduced in metallized film capacitors by using a cycloaliphatic epoxide as a dielectric impregnant.

Abstract: A cyclic olefin extended polyurethane system comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, optionally, a liquid ester or other type of extender. Said polyurethane systems are cured, crosslinked, non-spewing, grease compatible, and reenterable. This extended polyurethane is further characterized as having superior insulating properties so that it can be used for repairing, encapsulation or reclaiming electrical or telephone cables as well as hard volume encapsulants for general elastomer use. The extended polyurethane is comprised of a defined polyurethane, novel extender combinations, and optionally, a coupling agent.

Abstract: A novel electrical insulating oil and oil-filled electrical appliances that are impregnated with the novel insulating oil. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) at least one member of alkylbiphenyls and alkylnaphthalenes and (b) at least one member of monoolefins and diolefins each having two condensed or noncondensed aromatic nuclei.

Abstract: An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) at least one member of diarylalkanes and (b) at least one member selected from the group of mono- and/or diolefins having two condensed or noncondensed aromatic nuclei.

Abstract: A flameproof electrical insulating fluid and an electrical cable impregnated with such fluid, the insulating fluid being a mixture of a polymethylsiloxane having a viscosity greater than 5 centistokes at 25.degree. C. and an aromatic compound corresponding to the chemical formula: ##STR1## where R is an aliphatic radical and said aromatic compound is present in the mixture in an amount from 0.5% to 10% by weight of the total weight of the mixture. Preferably, the aromatic compound is isopropyldiphenyl.

Abstract: A filling composition comprising a styrene-rubber-styrene block copolymer and an oil is used to prevent water entry into optical fiber cable. The composition provides:(1) suitably low viscosity to allow filling the cable at elevated temperatures;(2) low modulus to minimize microbending loss in the optical fibers; and(3) high slump temperature to minimize flow of the material at an elevated service temperature from the end of a filled cable.

Abstract: Electrical devices that are impregnated with a dielectric fluid, that is substantially free from water, having a high level of unsaturation and a low viscosity, are disclosed. This dielectric fluid is a reaction product of a siloxane and a silane. The silane has the general formula R.sub.a R'.sub.b Si(OX).sub.4-a-b wherein R is selected from the group consisting of hydrogen, substituted saturated hydrocarbon radicals, and unsubstituted saturated hydrocarbon radicals, R' is selected from the group consisting of substituted and unsubstituted unsaturated hydrocarbon radicals, X is selected from the group consisting of alkyl, alkenyl, alkynyl, aryl and acyl radicals, a has a value of 0 to 3, b has a value of 0 to 3, with a+b having a value of 0 to 3.

Abstract: Disclosed is a method of inhibiting the attack by perchloroethylene on copper and organic polymers subject to said attack, such as parylene, by adding to perchloroethylene about 20 to about 1000 ppm of a stabilizer having the general formula ##STR1## The preferred concentration of the stabilizer is about 40 to about 500 ppm. Also disclosed is an electrical apparatus containing copper or organic polymer subject to attack by perchloroethylene and perchloroethylene containing the stabilizer.

Abstract: A direct current, electric, submarine cable which may be used in long lengths and at great depths and which has improved voltage breakdown characteristics with respect to voids which form in the insulation. The cable has a conductor surrounded by an inner semi-conductive screen which is surrounded by cellulose paper tape insulation which is surrounded by an outer semi-conductive screen which is surrounded by a metal sheath. The paper tape is impregnated with a compound comprising a viscous hydrocarbon oil containing a substance having polar groups, the amount of the substance being sufficient to make the volume resistivity of the compound 100 times lower than the volume resistivity of the tape with the compound therein.

Abstract: Compositions containing ditolyl ethers have outstanding dielectric properties. They are particularly suitable for use as impregnating agents in condensers.

Abstract: Polypropylene glycol dielectric fluids are used to impregnate electrical capacitors and particularly metallized capacitors for improved performance.

Abstract: A dielectric fluid for a capacitor includes a mixture of phthalate ester, polychlorinated benzene and a linear alkylbenzene.

Abstract: A method and apparatus for retarding electrochemical tree-type decomposition of polyolefin electrical insulation by saturating the insulation with a liquid having high resistivity and a low dielectric constant. The insulation of cables which have already been in service is dried prior to being saturated with the liquid. One embodiment of the invention provides a continuing supply of liquid to the cable after it has been buried underground.

Abstract: A composition useful for filling communication cables is described which comprises petroleum jelly and a small amount of siliceous material which renders the petroleum jelly viscous at elevated temperatures, and prevents leakage of the petroleum jelly from a cable having a flaw, which is subjected to elevated temperatures; the composition is particularly useful in communication cables having cellularly insulated conductors where migration of the flowable filler composition into the cellular insulation is diminished.

Abstract: An electrical apparatus, such as a capacitor, having an improved dielectric system. The capacitor includes alternate layers of metal foil and dielectric material which is impregnated with 1,1-bis(3,4-dimethylphenyl)ethane. The capacitor has improved corona characteristics and low dielectric losses. The liquid dielectric is biodegradable and environmentally acceptable.

Abstract: An electrical insulating oil and oil-filled electrical appliances, in which the insulating oil comprises a mixture of diarylalkanes and alkyl-3-arylindane derivatives and/or 1,3-diarylbutene derivatives, and has various advantageous properties such as a high dielectric constant, hydrogen gas absorbing capacity, and adaptability to plastic film materials. By impregnating with the above insulating oil, high performance and long life electrical appliances can be manufactured.

Abstract: The electric device according to the present invention has as its constituents the insulating materials and elements comprising films of synthetic resin, for instance, polypropylene, impregnated with 1-phenyl-2-ethylphenylethane and/or 1-phenyl-2-isopropylphenylethane.According to the present invention, insulating oils having favorable compatibility with the film of synthetic resin such as polypropylene and favorable affinity to metals and having low viscosity have been provided, and in addition, electric devices excellent in properties of withstanding a high voltage and dielectric properties in a broad range of temperature from a low temperature to a high temperature have also been offered.

Abstract: Provided is an oil-impregnated power cable comprising an insulation layer formed by winding a composite film of polyolefin film and insulating paper onto an electric conductor and impregnated with an impregnating oil, said impregnating oil comprising distillates within a boiling range in terms of values at normal pressure between 265.degree. C. and 360.degree. C. obtained by contacting a hydrocarbon mixture with a boiling range between 75.degree. C. and 198.degree. C. resulting from a thermal cracking of petroleum hydrocarbons at a temperature of 700.degree. C. or higher and containing monocyclic aromatics and aromatic olefins, in liquid phase with an acid catalyst.

Abstract: The present invention relates to a laminated insulating paper formed of cellulose paper or papers which is adhered to at least one side of cross-linked silicone grafted polyolefine film and to an oil-filled (OF) cable which insulated by the laminated insulating paper. The laminated insulating paper has outstanding peel strength as well as excellent non-solubility and anti-swelling properties in insulating oils.

Abstract: An insulating fluid for impregnating the solid insulation of an oil-filled electric power cable, particularly for a cable to be submerged in water, which comprises at least one lower aliphatic derivative of napthalene, preferably, 1 methylnapthalene or 1, 2, 3, 4-tetrahydronapthalene, or mixtures thereof or a mixture of one or more lower aliphatic derivatives of naphthalene with a conventional impregnating fluid. In the latter case, the derivative is present in a significant amount and preferably, is present in an amount sufficient to provide a specific gravity substantially equal to the specific gravity of water. Also, an electric power cable having its insulation impregnated with such insulating fluid.

Abstract: The present invention provides novel electric insulating oil compositions and a process for preparing the same. The electric insulating compositions of the invention comprise distillates within a boiling range in terms of normal pressure between 265.degree. C. and 360.degree. C. obtained by processing a hydrocarbon mixture from cracking of petroleum hydrocarbons at a temperature of 700.degree. C. or higher principally composed of components with a boiling range between 75.degree. C. and 198.degree. C., said components mainly containing monocyclic aromatics and comprising aromatic olefins of said boiling range, in liquid phase in the presence of an acid catalyst under such conditions that the reaction temperature is from 0.degree. C. to 200.degree. C., the liquid residence time is from 0.1 hour to 5 hours and the concentration of aromatic olefins in the reaction system is 10% by weight or below.

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: A grease compatible cyclic olefin extended polyurethane comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, a plasticizer having a total solubility parameter of .[.between about 8.3 and 8.9 or.]. about 9.1 and 9.7. Certain extended polyurethanes are characterized as being reenterable, such that they can be used for repairing, encapsulation or reclaiming electrical or telephone cables. Alternate formulations can be used as hard volume encapsulants for general elastomer use.