Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, bonded thereto or blended therewith, (b) a linear or cyclic organopolysiloxane containing one or more functionalized hindered amine moieties; and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.

Abstract: A two-part system for electrical stress control includes a non-tacky conformable stress control material that is positioned at the shield cut edge of a prepared power cable and a stress control tube over the non-tacky conformable stress control material. A second region of conformable stress control material is positioned adjacent the cut end of the insulation.

Abstract: A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.

Abstract: An electrically conductive composite article is provided having a polytetrafluoroethylene fibril matrix and a predetermined volume. The electrically conductive composite article comprises electrically conductive particles, and electrically nonconductive, energy expanded hollow polymeric particles. The volume percent of the electrically conductive particles is at least 20 volume percent. The electrically conductive composite article is continuously electrically conductive throughout its entire structure. Accordingly, electric current freely flows through the composite article due to the low resistivity of the article. The electrically conductive composite article may additionally include an elastomer material disposed within the article in a discontinuous fashion.

Abstract: The invention relates to coating composition, coated articles of manufacture, and to the formation of the coated articles. The coating is an energy-beam set resin containing fluid containing heat-expandable, fluid-encapsulating hollow spheres in the resin. The coating of a substrate, such as a communication line material, is accomplished by coating the material with a resin mixture containing expandable spheres and then exposing the coated material to an energy-beam source for a period of time to cure the resin and expand the spheres. The coating is applied to at least one filament of a communication line material. Such filaments can be gathered into bundles which are first extrusion coated with a thermoplastic polymer before being coated with the resin mixture. The composition of the resin material can be varied by changing the volume percent of the hollow spheres present in the resin mixture.

Abstract: The present invention is an improved jacketing material for all forms of electro-magnetic energy conductors. The jacket material of the present invention comprises a silicone material that is imbibed into a porous polymer, such as expanded polytetrafluoroethylene, to produce a flexible and durable composite. When applied as a cable jacket, the composite material of the present invention produces dramatic improvement over the use of silicone alone, especially in the areas of load sharing, resistance to fatigue from repeated flexure, and resistance to harsh environmental conditions. The ability of the material of the present invention to withstand repeated autoclave cycles without compromise makes it particularly suitable for cable jacketing in bio-medical applications.

Abstract: Glass particles (14) are mixed within an uncured silicone resin (13). The fluid uncured resin is placed in a portion of a terminal block (11) and cured to form a gel (13') by subjecting it to microwaves in a microwave oven (22). Conductors (25, 26) to be interconnected are next inserted into the cured silicone gel and interconnected. The cured gel containing the glass particles thereafter constitutes a dependable insulator for the conductors, particularly the portions of the conductors that are interconnected.

Abstract: The invention relates to coating composition, coated articles of manufacture, and to the formation of the coated articles. The coating is an energy-beam set resin containing fluid containing heat- expandable, fluid-encapsulating hollow spheres in the resin. The coating of a substrate, such as a communication line material, is accomplished by coating the material with a resin mixture containing expandable spheres and then exposing the coated material to an energy-beam source for a period of time to cure the resin and expand the spheres. The coating is applied to at least one filament of a communication line material. Such filaments can be gathered into bundles which are first extrusion coated with a thermoplastic polymer before being coated with the resin mixture. The composition of the resin material can be varied by changing the volume percent of the hollow spheres present in the resin mixture.

Abstract: Disclosed herein are a heat resistant insulated wire which is not decomposed but maintains insulativity under a high temperature with excellent adhesion of a coating film, and a method of preparing the same. The heat resistant insulated wire includes a base material consisting of an electrical conductor, and an insulating layer provided on its surface. The insulating layer is obtained by heating a second polymer, in which main chains expressed in a chemical formula--[Si(R.sub.1).sub.2 --N(R.sub.2)].sub.n --are cross-linked with each other by chloroborazine through side chains containing trialkylsilyl radicals at a temperature of at least about 300.degree. C. and not more than 500.degree. C.

Abstract: An electrical cable having a wire bundle core surrounded by a thermal protection sleeve, the thermal protection sleeve consisting of a sandwich structure of outer acrylic adhesive layer and a silicone foam core.

Abstract: An electrical cable having a wire bundle core surrounded by a thermal and chafe protection sleeve, the thermal and chafe protection sleeve consisting of a sandwich structure having an additional outer layer of fiberglass lacing tape and a fluorosilicone fuel resistant coating.

Abstract: An apparatus for manufacturing a resin cord with enclosed fine metal wires is provided as a unit, in which fine metal wires are supplied from a nipple to a die while extruding a resin around the nipple into the die for burying the fine metal wires in the resin in the length direction of a hollow or solid resin cord, the nipple having a central space in its section perpendicular to the extruding direction and also fine metal wire supply grooves joining the central space, a nozzle made of a wear-resistant material being provided in the central space. The outer diameter of the cord is 0.3 to 2.0 mm, the thickness of the resin part is 0.1 mm or above, the diameter of fine metal wires is 0.03 to 0.2 mm, and the thickness of the resin part is greater than the diameter of the fine metal wires.

Abstract: An electrical cable having a wire bundle core surrounded by a thermal protection sleeve, the thermal protection sleeve consisting of a sandwich structure of a laminate of silicone foam provided on both sides with an acrylic adhered layer of fiber glass, the sandwich structure having an additional outer layer of acrylic adhesive adhered silicone release liner material or fiber glass lacing tape.

Abstract: An electrical cable has one or more electrical conductors (1A, 1B, 1C) enveloped in electrically insulating material (2A, 2B, 2C, 3, 5, 13). At least some of the electrically insulating material is formed of a composition having an elastomer, an oxide of iron and silicon carbide.

Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of an insulation portion that has a glass fiber yarn wrapped around the conductor. The glass fiber yarn is impregnated at an outer periphery by a first silicone mixture. A second silicone mixture is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the Fiberglas.TM. yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.

Abstract: A plenum cable (20) includes a core (22) comprising at least one transmission medium such as a metallic conductor. The metallic conductor is insulated with a layer (27) of a plastic composition of material which includes a non-halogenated constituent such as, for example, a polyetherimide. Covering the insulated metallic conductor is a jacket (39) comprising a halogenated material such as a fluoropolymer. The cable exhibits excellent flame retardant properties as well as acceptable levels of corrosion and toxicity.

Abstract: An improved silicone mixture is disclosed that is abrasion resistant and more durable than prior silicone compounds. A silicone rubber is combined with clay and, optionally, a quantity of powdered alumina-trihydrate may be added to provide fire resistance. The silicone rubber may be either a liquid silicone rubber, or, in a second embodiment a vulcanizing silicone rubber. The final mixture is arrived at by distinct methods depending on the type of silicone rubber that is utilized. A method of disposing mixture upon an electric cable to create an insulation outer coating for the electric cable is also disclosed.

Abstract: A covered lead wire for vehicles, comprising a cover comprising a composition containing;(A) 100 parts by weight of polyvinyl chloride resin;(B) 0.1 part to 10 parts by weight of polyorganosiloxane;(C) at least 30 parts by weight of a plasticizer; and(D) at least 1 part by weight of a stabilizer.The present covered lead wire can achieve good abrasion resistance and scrape resistance even with reduced thickness of the cover, and can meet the recent demands for the weight-saving and improvement of wiring workability.

Abstract: An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 percent by volume of a powdered filler in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10.sup.4 -10.sup.8 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10.sup.10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.

Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of a insulation portion that has a glass fiber yarn wrapped around the conductor. The yarn is impregnated at an outer periphery by a first silicone compound. A second silicone compound is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the glass fiber yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.

Abstract: An improved process and apparatus for making electric cable is disclosed that will result in electric cable with improved burn resistant characteristics. The improved process and apparatus consists of a first yarn wrapping portion, an impregnating section, a drying section, a coating section, a second drying section, and a coiling section for returning the wire to a reel. This process wraps a glass fiber yarn about an electric wire and then impregnates this yarn with a silicone mixture. The impregnated yarn is then dried and sent to a second coating chamber where an additional silicone mixture is coated about the outer periphery of the yarn. The wire goes into a second drying section and then goes on to the coiling section. In a second embodiment of this invention silicone tape is used to wrap around the electric wire than than the glass fiber yarn.

Abstract: An organosilane of the general formula ##STR1## where R denotes a hydrogen or alkyl radical, n is 2 to 5, Ph denotes an aryl radical, and R' denotes an alkyl radical, and the hydrolysis product, a disiloxane, of said organosilanes with water, where said compounds are useful as anit-treeing additives to polyolefin.

Abstract: A moisture resistant splice assembly for communications and electrical cables is provided. The assembly employs a moisture activatable encapsulant.

Abstract: A heat and oil-resistant electric insulated wire comprises a conductor coated with an insulating layer which is formed of a vinylidene fluoride-based fluororubber and a silicone rubber added thereto. The amount of silicone rubber added is in a range of 2 to 30 parts by weight, preferably 5 to 20 parts by weight per 100 parts of said fluororubber, said fluororubber being a vinylidene fluoride-propylene hexafluoride copolymer and/or a vinylidene fluoride-propylene hexafluoride-ethylene tetrafluoride terpolymer.

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: An optical fiber cable unit in which an elongated optical fiber is telescoped into an outer jacket such that an annular space is defined between the fiber and the jacket. The space is filled with a polyorganosiloxane "grease" having extremely good thixotropic properties which cause the material to establish a gas-tight seal between the fiber and the jacket while allowing the fiber to float freely within the jacket to avoid elongation of the fiber when tension is applied to the cable.

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: Halogen-free, flame-resistant hydrocarbon polymer compounds comprising an organopolysiloxane gum, and a lead compound, and electrical conductors insulated therewith.

Abstract: A cast cable connection comprising cables having their conductors interconnected and surrounding the conductors a housing containing a cured filler resin therein, said housing comprising bound, flexible, ceramic particles.

Abstract: A flame retardant low smoke PVC-based thermoplastic composition for use in wire insulation and cable jacketing is disclosed. The composition includes poly(vinyl chloride), chlorinated poly(vinyl chloride), molybdenum oxide, alumina trihydrate, and isodecyl diphenyl phosphate as its primary ingredients, and additionally includes at least one heat stabilizer, at least one antioxidant, at least one lubricant, and at least one plasticizer besides the isodecyl diphenyl phosphate. It may also include antimony oxide, fillers, and chlorinated paraffins. The composition has excellent flame retardancy and produces only a relatively small amount of light-colored smoke when burned.

Abstract: A high voltage coaxial cable wherein a corona-free configuration is produced by applying a room temperature-curable silicone elastomeric material under pressure to the outer surface of the cable braid so that the material is forced between the voids of the braid and adheres to the primary insulation material at the insulation/braid interface.

Abstract: An article of manufacture comprises an electronic device having a silicone resin encapsulant thereover, wherein the silicone resin is an oxime and water free formulation derived from curing a mixture consisting essentially of a heat curable silicone elastomer prepolymer and a dialkylaminoalkoxysilane. The mixture may also contain fillers and a small amount of curing catalyst and stabilizer.

Abstract: A ceramic-like high temperature insulation for electrical coils is provided by mixing a silicone resin, synthetic fluoro-mica and a devitrified mica glass, impregnating an electrical coil with such material, curing the material and then treating the material to an elevated temperature about 300.degree. C. The elevated temperature treatment may be effected either prior to or during use of the coil.

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

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: An improved cable having a metallic inner conductor, a dielectric material surrounding the inner conductor and a metallic outer conductor or sheath comprises corrosion inhibiting adhesive disposed at the interface between at least one of the metallic conductors and the dielectric. The adhesive composition comprises a polyfunctional silane compound reacted with the metallic surface of the conductor and providing corrosion resistance thereto while also promoting bonding between the conductor and the dielectric.

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: An enameled wire having resistance to overload which comprises an electric conductor and a baked wire enamel coat is disclosed. The wire enamel coat is applied to the conductor through a die from wire enamel comprising a silicone resin having incorporated therein 50 to 200 phr of particles of an inorganic tabular crystalline material that have a maximum average particle size not greater than 80.mu., an average not greater than 40.mu. and an average aspect ratio between 30 and 100 and which react with the silicone resin at elevated temperatures to become a ceramic and which have been surface-treated with a coupling agent, a surface active agent or a coating agent. The tabular crystals in the wire enamel coat are orientated parallel to the surface of the conductor. The enamel coat has good adhesion to the conductor and will not easily crack or peel off the conductor even when subjected to high temperatures and adverse physical stress.

Abstract: A mixture of substances is fed to an extruder and, after being homogenized and liquefied, is extruded on an electric conductor or as a pipe. To meet electric cable specifications, the insulating material used is a polyolefin, such as polyethylene, cross-linking of which is brought about by the addition of a silane, a free-radical generator, and a silanol condensation catalyst. After extrusion, cross-linking takes place in the presence of moisture. To facilitate penetration of the moisture and accelerate cross-linking, an agent capable of reducing the rate of crystallization of the polymer, such as vinyl acetate, is used as a further additive.

Abstract: An electromechanical cable capable of withstanding high pressures and temperatures of at least 200.degree. C., the cable comprising a core having a plurality of insulated conductors (3,5) covered with a conductive filler (7) which fills the voids between the conductors, the core being surrounded by a layer of conductive textile material (8) and by at least one layer of helically wound metal armor wire (9,10). The filler is a composite material comprising a silicone polymer with a semiconductor charge of carbon black.

Abstract: A particular dielectric fluid, having a composition with a specific gravity of at least 1.02 and consisting essentially of a silicone fluid and an additive, soluble in said silicone fluid, selected from the group consisting of trimethylsilyl treated (CH.sub.3).sub.3 SiO.sub.1/2 /SiO.sub.2 resin copolymer, dipropyleneglycoldibenzoate, dixylylethane, phenylxylylethane, and a mixture of [(CH.sub.3).sub.3 Si].sub.2 O treated silica and a silica aerogel, is employed to encapsulate and insulate an electrical cable splice. The same particular dielectric field composition is also used to fill an electrical cable's conductor interstices.

Abstract: A silicone rubber covered electrical conductor is described which has good insulative resistance and is easily stripped for termination. The silicone rubber used as the insulation comprises an organopolysiloxane, a silica filler, zinc oxide or a zinc salt of a fatty acid, and orthochlorobenzoyl peroxide.

Abstract: Compositions which cure to electrically conductive silicone elastomers containing greater than 2 percent by weight of phenyl radicals, are disclosed. The compositions comprise a mixture of polydiorganosiloxane and greater than 15 percent by weight of electrically conductive carbonaceous particles of less than 20 micrometers average diameter. Electrically conductive members of controlled resistivity are manufactured using these compositions. These electrically conductive members are useful as the core for improved automotive ignition cable. The ignition cable has a long useful life.

Abstract: The anti-inflammability of dimethyl silicone oil for use in static electric apparatuses is improved by reacting the dimethyl silicone oil with a cerium chelate compound so as to bind thereto a predetermined amount of the cerium chelate compound. This binding suppresses the generation of the cyclic oligomer components to be produced by the decomposition of dimethyl silicone oil, thereby elevating the flash point of the dimethyl silicone oil.

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

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: An improved sheathed cable and method for producing same is described. The cable includes an inner insulated conductor/conductor group, an outer corrugated metal sheath, and a barrier layer of a pliable, inert sealing material disposed therebetween to prevent the passage of gas or vapors via the cable. The method includes the steps of applying the pliable material around the inner insulated conductor/conductor group, wrapping the pliable material with a flexible tape, forming an outer metallic sheath around the material, and making annular corrugations in the outer sheath so as to compress the sealing compound.

Abstract: This disclosure relates to a fireguard for protecting a hose or an assembly of a hose and fittings. The fireguard includes a layer or tube of a silicone compound which is positioned around the hose, and a metal shroud or sleeve which encloses the layer of silicone compound. The silicone compound and the shroud protect the hose at normal temperatures and for a short length of time at a high temperature. In the event the high temperature persists for a length of time, the silicone compound decomposes to a layer of silica ash, which is held in place between the shroud and the hose, and the ash forms an excellent heat insulation for an extended time. The shroud is preferably flexible so that the hose may be bent, and the fireguard preferably also includes another layer of the silicone compound and a collar around each hose fitting.