Abstract: An insulated electrical cable is disclosed, comprising an electrical conductor coated with an insulating layer comprising an ethylene/.alpha.-olefin copolymer having a density of from 0.89 to 0.91 and an ethylene/vinyl acetate copolymer.

Abstract: An electric cable having at least one conductor and at least one covering therefor obtained from the polymerization of a silanic monomer of a compound comprising a non-cross-linked base-polymer and a polymerizable silanic monomer present prior to polymerization in a quantity not less than 5 parts by weight with respect to 100 parts by weight of the base-polymer. Thepolymerization of the silanic monomer units forms a polymeric mesh which is closely interconnected and thoroughly compenetrated into the non-cross-linked base-polymer. In one embodiment the polymeric mesh may be grafted onto the base-polymer through the addition of an organic peroxide. Thus, there is provided an electric cable for use as building wires wherein the conductor covering is not cross-linked but is heat resistant to temperatures above the deformation temperature of the base-polymer.

Abstract: The present invention provides a method for improving impulse destructive strength of an electrical insulating material which is characterized by employing, as the electrical insulating material, a random copolymer of a styrene series monomer and ethylene or a combination of ethylene and another ethylenic unsaturated monomer, or a composition in which the copolymer is blended with an ethylene series polymer, the copolymer being prepared by introducing, into a reaction system, the styrene series monomer selected from the group of styrene and single-ring substituted styrenes, ethylene or the combination of ethylene and the ethylenic unsaturated monomer and a polymerization initiator, the latter being introduced thereinto separately from at least the styrene series monomer, and subjecting these monomers to a high-pressure radical copolymerization under a polymerization pressure of 500 to 4,000 kg/cm.sup.2 at a polymerization temperature of 50.degree. to 400.degree. C.

Abstract: A water stabilizer polymeric composition incorporating a hydrated alumina filler, which is characterized by the presence of an effective amount of an antimony V compound. The compositions have a reduced tendency to absorb water and specific compositions find applicaiton as electrical insulation and in the production of dimensionally recoverable article.

Abstract: An insulated conductor for a wire harness comprising a conductor and an insulation with which the conductor is covered, the insulation being formed of thermoplastic polyurethane having shore D hardness of more than 50, thickness of less than 0.2 mm, and an adherence of the insulation to the conductor less than 2 Kg/10 mm, being measured as the required force to pull 10 mm of the insulation off the conductor.

Abstract: A low-voltage cable with insulation having good fire self-extinguishing and life cycle properties and with improved heat resisting and low toxic gas generation properties. The cable is formed by extruding a mixture of a polymer which is substantially non-cross-linkable by irradiation, a monomer cross-linkable by irradiation and optionally, a fluidizing polymeric material which is cross-linkable by irradiation around a conductor and subjecting the so-formed cable to irradiation to cross-link the materials cross-linkable by irradiation.

Abstract: Esters and urethanes of certain polydialkylsiloxanepolyoxyalkylene block and graft copolymers which impart high voltage stabilization to dielectric olefin polymers, the stabilized olefin polymer insulating materials resulting therefrom and electric wire or cable insulated therewith.

Abstract: In an excellent windability magnet wire wherein an insulating layer of a synthetic resin film is formed on a conductor directly or with another insulation in between and a lubricant layer is formed on the insulating layer, the lubricant layer is made of an intimate mixture of natural wax as a major constituent and thermosetting and fluorocarbon resins compounded therewith.

Abstract: A grease composition comprising oil, colloidal particle filler, and, optionally, a bleed inhibitor is disclosed. The grease typically has a critical yield stress below 140 Pa at 20.degree. C., preferably below 70 or 35 Pa. The grease can advantageously be used as a cable filling material, especially for optical fiber cable. In the latter case it can result in cable having substantially no cabling loss. Preferred compositions comprise 77 to 95% b.w. of ASTM type 103, 104A, or 104B paraffinic or naphthenic oil, or polybutene oil; 2 to 15% b.w. of hydrophobic or hydrophilic fused silica; and optionally, up to 15% b.w. of styrene-rubber or styrene-rubber-styrene block copolymer, or semiliquid rubber.

Abstract: An improved thermally stable, lubricious magnet wire enamel is disclosed which is particularly suitable for use as an outermost insulating, lubricating layer on a magnet wire substrate. The enamel comprises the reaction product of a tri-basic acid anhydride, a diisocyanate and a polyfunctional organosiloxane. The coating has a coefficient of friction, after application to magnet wire, of less than 0.10. It is also substantially all polyfunctional organosiloxane reacted, i.e. substantially no polyfunctional organosiloxane is capable of being extracted from the cured coating with organic solvents.

Abstract: For use as a heat sealable, high temperature, insulative wrapping, a laminar structure of a polyimide inner layer and two fluoropolymer outer layers wherein the outer layers are pigmented for a combination of color, increased heat aged bond retention, and reduced heat seal energy requirements.

Abstract: The invention relates to an electrical insulation composition of a polyolefin, which can be used for medium and high voltage from about 10 kV and which resists effectively and permanently the formation of so-called water trees. The insulative polyolefin contains an inorganic oxide additive, in homogeneous distribution therewith, at a concentration of 0.05 to 10% by weight, relative to the total weight of the composition. The additive is absorption-active for heavy metal ions and/or binds heavy metal ions in an ion exchange, with a particle size of up to 50 um or an agglomerate size of up to 100 um. It can be silica, alumina, hydrated alumina or an aluminum silicate. The electrical insulation according to the invention is particularly well-suited for use in cables and wires.

Abstract: There is provided a curable ether modified polyester resin composition comprising the reaction product of (a) at least one dicarboxylic acid, (b) at least one aliphatic polyol, and (c) at least one aromatic bis (ether dianhydride) or the corresponding tetracarboxylic acid.

Abstract: A sheath for light waveguides. The sheath consists of a tube loosely surrounding one or more light waveguides. In a neutral bending plane, longitudinal elements are provided for absorbing tensile and compressive forces. The coefficient of expansion of the longitudinal elements corresponds to that of the light waveguides. The longitudinal elements are form-coupled and force-coupled to the tube.

Abstract: Ether modified polyesterimide resins are prepared by reacting under esterimide forming conditions substantially free of inert solvents a mixture consisting essentially of:(i) a diamine,(ii) a carboxylic acid anhydride containing at least one additional carboxylic group,(iii) an aromatic bis (ether anhydride) or the corresponding acid thereof,(iv) terephthalic acid and/or isophthalic acid,(v) a polyhydric alcohol having at least two hydroxyl groups, and(vi) optionally, a monoether of diethylene glycol or a monoether of triethylene glycol.

Abstract: The invention relates to electrical insulation material of a polyolefin composition with a phosphate additive which prevents the formation of so-called water trees. The phosphate additive may be a water-soluble alkali or earth-alkali phosphate and/or a hydrolysable phosphoric acid ester (RO).sub.3 PO, wherein at least one of the substituents R is an aliphatic radical and the remaining substituents may be hydrogen or an aliphatic radical. The electrical insulation according to the invention is suited particularly for use in cables and wires.

Abstract: A conduit tube of an electrode device for electrically heating underground hydrocarbon resources, which comprises: a metal conduit tube and an electrically insulative covering adhered on and around the outer peripheral surface of said metal conduit tube, said electrically insulative covering being formed by adhering polyether/ether/ketone resin in powder form having particle size of a range of from 10 to 100 .mu.m on and around said metal conduit tube which has been preheated to a temperature range of from 350.degree. C. to 450.degree. C. by the electrostatic coating method, and fusion-bonding the electrically insulative covering material thereon at said temperature range of the preheating.

Abstract: This invention relates to a composition comprising (1) a phenoxy resin and (2) at least two compositions selected from (a) phenolic resins, (b) melamine resins and (c) polyisocyanates; to the cured products thereof; and to an electrical conductor coated with said cured products.

Abstract: Melt-fusible polyimides based on pyromellitic dianhydride and at least one defined aromatic diamine are useful in making low-void composites and thermoplastic tapes, which can be fabricated into articles such as, for example, aircraft and autobody panels, printed circuit boards, etc. Some of these polyimides are melt-processible and can be fabricated by conventional procedures such as extrusion and injection molding.

Abstract: An optical composite cable having an outer sheath comprising a radiation cured copolymer of ethylene and vinyl acetate containing 50-85% by weight of vinyl acetate having intimately admixed therewith a flame retarding and smoke suppressing amount of a finely divided filler mixture consisting essentially of a first filler selected from hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate.

Abstract: The invention relates to electric insulation of polyolefin suitable for medium and high voltage from about 10 kV which resists the formation of so-called water trees. For this purpose, the insulation contains as an additive at least one alcoholate of magnesium, calcium or aluminum. The electric insulation according to the invention is particularly suitable for use in cables and wires.

Abstract: There is presented a highly reliable resin encapsulation type semiconductor device excellent in humidity resistance as well as high temperature electrical characteristics. The specific feature consists in the epoxy resin composition employed for encapsulation. This composition comprises an epoxy resin, a novolac resin as curing agent and an organic tertiary phosphine compound as curing accelerator. The resin encapsulation type semiconductor device is markedly small in leak current under hot and humid conditions and has a prolonged life due to difficult deterioration through corrosion of electrodes and aluminum wiring, as compared with those of prior art.

Abstract: An encapsulant for an electronic device comprises a silicone resin having a highly colored porphyrin compound doped therein.

Abstract: A corona-resistant wire enamel composition is described comprising a polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant insulations for an electrical conductor employing the above composition and an electrical conductor insulated with a coating of the wire enamel composition are also disclosed.

Abstract: An unfilled polymeric composition having improved electrical treeing and water treeing properties comprising a polymeric component and effective amounts of a silane and a fatty acid. The compositions are particularly useful as insulation for high voltage transmission and distribution cables.

Abstract: There is disclosed an undersea communications cable containing optical fibers. The cable is fabricated so that fiber optical loss characteristics vary only slightly with changes in tensile strain in the cable.

Abstract: Organophosphorus compounds having the general formula ##STR1## useful as water tree resistant additives for polymeric compositions.

Abstract: A polyamide-imide resin composition comprising (A) a polyamide-imide resin modified with a polyisocyanate containing one or more isocyanurate rings and a lactam and (B) at least one member selected from the group consisting of (i) an alkoxy modified amino resin, (ii) a polyisocyanate containing one or more isocyanurate rings, (iii) a phenol-formaldehyde resin, (iv) an epoxy resin, (v) a polyester resin having one or more hydroxyl groups obtained by using terephthalic acid and/or isophthalic acid as an acid component, and (vi) a metal salt of Sn, Mn, Co or Zn, can give fast curing properties to the resin composition without lowering heat resistance, flexibility, abrasion resistance and also giving good surface appearance to the coating.

Abstract: The invention relates to a polymer composition based on a polyphenylene ether which is suitable for wire insulation extrusion. The polymer composition comprises a polyphenylene ether, optionally a polystyrene, a hydrogenated block copolymer, an aromatic phosphate compound, a mineral oil and optionally typical additives. The invention also relates to an electrically conductive wire comprising an insulation built up from the above-mentioned polymer composition and provided around the electrically conductive wire by wire insulation extrusion.

Abstract: Organophosphorous phosphites having the formula ##STR1## useful as water tree and electrical tree retardant additives for polymeric compositions.

Abstract: The present invention comprises a stain resistant flame retardant insulating composition that is stain resistant under conditions of natural aging, heat aging, or exposure to gases such as hydrogen sulfide or methane. The inventive insulating composition remains substantially white in color under elevated heating and combustion temperature conditions. The stain resistant electrical insulating composition of the present invention is also flame retardant and has a polymer system comprising ethylene-vinyl acetate copolymer and polyethylene. The composition also utilizes a vinyl silane component as a coupling agent, peroxide cross-linking agents, fillers, and a three part stabilizing system.

Abstract: An enameled wire which can be safely used for electric machinery such as an electric motor and transformer without causing smoking or fire accidents comprising a conductive wire coated with a thermoplastic straight chain polyurethane having therein the following repeating unit ##STR1## wherein R and R' each represents a divalent group having at least 2 carbon atoms.

Abstract: A corona-resistant wire enamel composition is described comprising a polyimide, polyamide, polyester, polyamideimide, polyesterimide, or polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant one and two-stage insulations for an electrical conductor employing the above compositions and an electrical conductor insulated with a one or two-stage coating of the wire enamel compositions are also disclosed.

Abstract: A composition of materials comprising a polyamide acid-silicone intermediate obtained by reacting (a) a diaminoamide compound of the formula: ##STR1## wherein Ar and Y are as defined in the specification, (b) a diaminosiloxane, (c) a diamine, and (d) an aromatic tetracarboxylic acid dianhydride can form a protective film used in a semiconductor device excellent in adhesive properties, heat resistance and preventing soft errors due to .alpha.-rays.

Abstract: Improved enamels and insulated electrical articles produced therefrom are described. The enamels are composed of solutions of curable resin which have been modified to contain nylon polymer. This polymer facilitates application of the enamel to a metallic conductor so as to produce an especially smooth and desirable insulation coating.

Abstract: Improved polyetherimide compositions and processes for their production are described. Various polyetherimide derivatives including water-soluble and tri-functional isocyanate cross-linked resins are described. They permit production of water-based enamels and coatable particulates which may be employed in, for example, formulation of insulated electrical conductors.

Abstract: A polyester, a polyester/polyamide or a polyester/polyamide/polyimide polymers are prepared from (a) a diaryl terephthalate or diaryl isophthalate, and (b) an aromatic polyol or of (a) and a mixture of (b), and an aromatic diamine, or of (a), (b), (c), and (d) a triaryl mellitate, or a copolycarbonate of any of the foregoing including units derived from (e) a diaryl carbonate. The resulting polyester, polyamide, polyester/polyamide or polyester/polyamide/polyimide polymers are adapted for use as an insulating coating on an electrical conductor.

Abstract: The disclosure of this application is directed to a composition, devoid of added mineral filler, comprising an ethylene polymer and an organo titanium chelate as a water treeing inhibitor. The compositions can be extruded about electrical conductors providing insulation thereon which is resistant to deterioration in the presence of moisture and/or an electrical field.

Abstract: A heat resistant resin produced by reacting (A) a polyamideimide resin with (B) an alcohol component and (C) an acid component with heating is soluble in a cresol type solvent and gives coatings excellent in heat resistance, thermal shock resistance, wear resistance, resistance to hydrolysis, etc., suitable for enamelled wire.

Abstract: A method of improving the physical and electrical properties of polymer insulation coated electrical conductors is described. A non-ionic surfactant added to an organic solvent solution of insulation polymer followed by coating the solution on the wire, drying and curing, has been found to produce a coated magnet wire with improved concentricity and smoothness, therefore resulting in improvement in other wire properties as well.

Abstract: Disclosed is a coating solution including an aromatic bis(ether anhydride) component, an organic diamine component, an organic triamine component, and a solvent system, and optionally water which may be coated on a substrate and polymerized to form high quality polyetherimide coatings.

Abstract: Flame retardant additive comprising alumina trihydrate and a methyl hydrogen polysiloxane which when added to ethylene polymers provide compositions which have improved flame retardant properties, have reduced gas evolution, do not drip or give off noxious gases on burning and are particularly useful as jacketing material about wire and cables.

Abstract: An elongated metallic conductor is insulated with an inner layer of a plasticized polyvinyl chloride composition and an outer layer of a plasticized, irradiation cross-linked polyvinyl chloride composition. The outer layer has a low coefficient of friction to facilitate pulling in central office racks, has mechanical properties which are required for installation and use and, in a preferred embodiment, has a thickness which is substantially less than that of the inner layer. The layers are extruded in the same extruder crosshead that seemingly causes the outer layer to bond to the inner layer to facilitate stripping of the composite insulation from the conductor.

Abstract: A method for stabilizing organic polymers against copper-catalyzed oxidative decomposition by means of N,N-bis-salicyloyl hydrazine as a metal deactivator is described wherein dust development of the metal deactivator is precluded with certainty and negative property changes of the stabilized organic polymers are avoided. For this purpose, it is provided that a paste which contains finely-crystalline N,N'-bis-salicyloyl hydrazine in fine distribution in a liquid to wax-like aliphatic hydrocarbon of low volatility is worked into the polymer. The method is particularly well suited for stabilizing polyolefins for cable and wire insulation.

Abstract: The disclosure of this application is directed to flame retardant compositions comprising an alkylene-alkyl acrylate copolymer, a halogenated flame retardant additive, an oxide, hydroxide, carbonate or sulfate of calcium or magnesium and antimony oxide as a second flame retardant additive. The compositions, as described, can be extruded about electrical conductors to provide insulation thereon and also extruded as jacketing about telephone wires and cables.

Abstract: A polyborosiloxane composition to be used for the formation of an insulating layer on an electric conductor comprises (A) a polyborosiloxane produced by the reaction of boric acid, a boric acid derivative, or a halogenated boron with a silane compound and a silicone oil, (B) a silicone resin or a synthetic resin having a nitrogen-containing heterocyclic ring in the molecule, (C) an inorganic filler, and (D) a common solvent for (A) and (B). An insulated electric wire excellent in thermal resistance is obtained by applying the composition to an electric conductor and baking the applied layer of the composition.

Abstract: Improved enamels and insulated electrical articles produced therefrom are described. The enamels are composed of solutions of curable resin which have been modified to contain nylon polymer. This polymer facilitates application of the enamel to a metallic conductor so as to produce an especially smooth and desirable insulation coating.

Abstract: Tracking is reduced in insulators comprising one or more polymers and an anti-tracking filler system comprising (a) a hydrate of alumina having a specific surface area of at least 2 m.sup.2 /g measured by the BET method, and (b) a compound selected from the group consisting of oxides, mixed oxides and mixtures of oxides wherein said compound contains at least one element selected from the group consisting of transition series elements, lanthanide series elements and nontransuranic actinide series elements.

Abstract: The disclosure of this application is directed to compositions having improved flame retardant properties containing an alkylene-alkyl acrylate copolymer, a halogenated flame retardant additive and an oxide, carbonate, hydroxide or sulfate of magnesium or calcium in an amount more than 20 and up to about 30 percent by weight. The compositions disclosed are useful as jacketing material and as insulation about wire and cable.

Abstract: Compositions, devoid of fillers, comprising an ethylene polymer and an N-phenyl substituted amino silane, which can be extruded about electrical conductors to provide insulation thereon which is resistant to the formation of water trees.