Abstract: A pulsed voltage surge resistant magnet wire comprising a conductor, a continuous and concentric and flexible uniform coat of base insulation material superimposed on the conductor and an essentially continuous and concentric and uniform pulsed voltage surge shield overlaying the coat of base insulation material.

Abstract: A method for improving the adhesion of alkylated chlorosulfonated polyethylene (ACSM) and chlorosulfonated polyethylene (CSM) rubber compounds to a resorcinol-formaldehyde latex (RFL) treated polyester reinforcing element using lower than conventional heat set temperatures comprising dipping the element into a RFL dip comprising chlorosulfonated polyethylene; drying the element; heat setting the element at a temperature in the range from about 300.degree. F. to about 425.degree. F. under tension; incorporating the element into the rubber compounds; and curing the element and the rubber compounds. Further, adding an amine functional polyacrylate to the RFL dip prevents failure of the adhesion of the cord at start up temperatures of about -40.degree. F.

Abstract: Disclosed is a fixing roll, comprising a core metal, a heat resistant elastic layer formed to cover the circumferential outer surface of the core metal, and a surface layer formed to cover the circumferential outer surface of the heat resistant elastic layer, the surface layer being formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin film of a double layer structure consisting of an inner layer having a volume resistivity of 10.sup.11 .OMEGA..cm or less and an outer layer having a thickness falling within a range of between 3 .mu.m and 50 .mu.m, and the entire thickness of the resin film falling within a range of between 20 .mu.m and 500 .mu.m.

Abstract: The conductive roll accordin g to the present invention can be used for develop ing, charging, destaticizing and transferring images of electrophotography as the roll can be tightly contacted against a photosensitive member for uniform charging of the potential. The conductive roll is constructed to minimize contamination of the photosensitive member. The conductive roll includes a highly conductive shaft provided at the core, an intermediate layer provided on the outer peri phery of the shaft and is made of a conductive and elastic material or a foamed member of such material, and a coated film layer provided on the outer periphery of the intermediate layer having a high resistance.

Abstract: A method of producing easily densified high bulk fibers that have adhered particulates. The high bulk fibers have hydrogen bonding or coordinate covalent bonding functionalities, and a binder is applied to the fibers to bind the particles to the fibers. The binder has a functional group that forms a hydrogen bond or a coordinate covalent bond with the particles, and a functional group that forms a hydrogen bond with the fibers. A substantial portion of the particles that are adhered to the fibers are adhered in particulate form by hydrogen bonds or coordinate covalent bonds to the binder, and the binder is in turn adhered to the fibers by hydrogen bonds. Fibers containing particles bound by this method are easily densified.

Abstract: Organic polymer surfaces are modified by contacting such surfaces with a haloester compound and a cationic compound of having a pK.sub.a >5. Preferably the organic polymer is selected from the group consisting of polyesters, aromatic polyamides, and graphitic polymers and the contacting is conducted at an elevated temperature.

Abstract: Vulcanizable semiconductive shield compositions contain a linear, single-site catalyzed polymer formed by polymerizing ethylene with at least one comonomer selected from C.sub.3 to C.sub.20 alpha-olefins; a carbon black selected from furnace carbon blacks that contain ash and sulfur in amounts of 50 ppm or less and have crystal dimensions L.sub.a and L.sub.c of 30 .ANG. or less, acetylene carbon blacks, and furnace carbon blacks having an ASTM grade of N-351; and a crosslinking agent. The compositions may be used to manufacture semiconductive shields for electrical conductors, such as power cables. The semiconductive shields exhibit improved processability, low water vapor transmission and low shrinkback, without abrading or corroding extrusion equipment.

Abstract: The oxidation protection for a surface of a carbon/carbon composite substrate having a primary protective coating previously formed thereon is improved by applying to said surface a layer of a coating material comprising titanium diboride, colloidal silica, and an intermetallic compound, e.g., silicon carbide. The primary coating can be a boronated silicon carbide coating.

Abstract: A fluorocarbon copolymer-insulated wire comprising, around a conductor, an insulating layer made of a composition comprising an ethylene-tetrafluoroethylene copolymer and an unsintered tetrafluoroethylene-propylene copolymer, which is resistant to heat, abrasion and oil, and improved in flexibility. The wire can be efficiently installed in a narrow space in various equipments and enables easy wiring work.

Abstract: The present invention relates to an insulated wire comprising a conductor and at least two insulating layers provided on the outer periphery of the conductor. The inner insulating layer is provided directly or via another insulation on the outer periphery of the conductor and comprises a polyolefin compound containing 20 to 80 parts by weight of at least one substance selected from ethylene .alpha.-olefin copolymer, ethylene .alpha.-olefin polyene copolymer (.alpha.-olefin having the carbon numbers of C.sub.3 -C.sub.10, polyene being non-conjugated diene).

Abstract: A metal oxide layer is provided around a thermocouple element. The metal oxide layer is formed by preparing a sol, in which particulates of a metal oxide are dispersed, by a sol-gel method, dipping the thermocouple element in this sol, energizing the thermocouple element as a cathode for bonding the precursor particulates of the metal oxide thereto, and heat treating the same. The thermocouple according to the present invention is compact with a thin insulating layer, excellent in flexibility, and provides no gas adsorption source.

Abstract: Disclosed is a heat-resistant, high-voltage insulated lead wire for direct current, which meets the demand for higher heat resistance, and its insulating coating over the conductor is formed by a polyolefin resin composition. The polyolefin resin composition is a flame-retarded resin composition comprising of a mixture of a polyethylene whose crystalline component has melting point higher than 125.degree. C. and a copolymer of ethylene and .alpha.-olefin, which contains a multifunctionalized monomer having unsaturated carbon-carbon bond moiety in the molecule as an indispensable component. The insulating coating made of this resin composition is irradiated by an ionizing radiation to give a heat-resistant, high-voltage lead wire for direct current, which has a perpendicular flame resistance (VW-1) acceptable in the UL Standards and has a temperature rating of higher than 125.degree. C.

Abstract: A ceramic insulated wire has a conductor core of copper or copper alloy, a stainless steel layer around the conductor core and a chromium oxide film (2A) around the stainless steel layer. The chromium oxide film (2A) is surrounded by an outer ceramic insulator formed by a vapor deposition method. Cladding the conductor core with stainless steel is done by inserting the core lengthwise into a stainless steel pipe, plastically working the resulting composite body to provide a desired size, and oxidizing the stainless steel which contains sufficient chromium for the formation of the chromium oxide film to have a thickness within the range of 10 nm to 1000 nm. The outer ceramic insulator formed by vapor deposition is made of Al.sub.2 O.sub.3, SiO.sub.2, AlN and Si.sub.3 N.sub.4 which provide an excellent heat resistance while the chromium oxide film substantially increases the bonding strength.

Abstract: A fire-resistant plenum-type electrical cable is provided that is insulated with an inner layer of a fluorocarbon containing polymer in contact with a surrounding electrical conductor, and an outer layer of abrasion-resistant polyvinyl chloride surrounding the inner fluorocarbon containing polymer layer. The inner layer of fluorocarbon containing polymer may be foamed.

Abstract: This invention relates to a new technique for preparing metal devices such as guidewires for the subsequent attachment of hydrophilic coatings. The invention also relates to guidewires and other devices made according to that method.In one embodiment of the method of this invention, a hydrocarbon residue undercoat is applied to a metal guidewire core by plasma deposition. A photoactive hydrophilic polymer is then deposited on the hydrocarbon residue coating and activated by ultraviolet light. The hydrocarbon residue coating acts as a tie layer between the hydrophilic polymer and the metal guidewire core apparently by providing C--C bonds for the covalent linking of the coating material to the tie layer. The resulting article of this invention is a guidewire having the maneuverability of a metal guidewire and the biocompatibility of a lubricious, hydrophilic polymer.

Abstract: Electrical insulating compositions of vinyl halide resins (PVC) are formulated to contain a polymeric metal aromatic polycarboxylate as an electrical insulating additive. For example, polymeric calcium terephthalate is used in minor amounts of about 0.2 to 0.5 phr PVC to provide an excellent insulating effect. Lead stabilizers may be avoided in the polymer compositions and, instead, nontoxic metal salt heat stabilizers such as calcium, barium, zinc, etc., may be used.

Abstract: Fiber-reinforced titanium alloy and intermetallic matrix composites having improved stability and tensile strength properties at elevated temperatures. The base reinforced fibers are pre-coated with a tailorable tri-layer coating, such as Ti--TiN--Ti. Preferably the TiN layer is graded so as to have metal-rich outer surfaces, such as titanium-rich TiN, providing excellent bonding affinity for the base titanium layer, bonded to the surface of the fibers, such as silicon carbide, and for the outer titanium layer, bonded to the titanium aluminum matrix, and a compound core, such as stoichiometric TiN, providing a stable interfacial barrier against chemical reactions, whereby the tensile strength and resistance to cracking of the composite is preserved even at elevated temperatures of 900.degree. C. or higher.

Abstract: A preferred composite which is useful at temperatures in excess of about 0.degree. C. comprising a ceramic matrix and 40-60% on volume basis of coated and uncoated fibers embedded in the matrix generally parallel to each other and in a controlled arrangement; the matrix is selected from the group consisting essentially of silicon nitride, silicon carbide and zirconium titanate; the fibers are silicon carbides fibers 5-20 microns thick; the coating on the coated fibers is boron nitride 0.1-0.3 microns thick; cross-section of the composite contains about one half, on volume basis, of uncoated fibers in one band extending from one side edge of the cross-section to the opposite side edge; the composite having unexpectedly improved strength and/or toughness compared to a composite composed of only coated or only uncoated fibers.

Abstract: The present invention relates to articles, particularly plate or sheet-like articles made of plastic in which very low contents of fine electrically conductive fibers are uniformly dispersed so as to make the articles conductive. It also relates to specific intermediate plastic products, referred to as grains, threads and granules, and the processes for manufacturing each of these products as well as the final conductive articles. The articles can be used as a suitable shielding against radio-frequency and high-frequency electromagnetic radiation or as antistatic plastic articles.

Abstract: An insulated wire is suitable for use as a distribution wire, a wire for winding a coil or the like, which is used in a high-vacuum environment or in a high-temperature environment such as a high vacuum apparatus or a high temperature service apparatus. The insulated wire has a base material (1) forming a substrate, a chromium oxide CrO.sub.3-x containing intermediate layer (2) on the substrate, and an oxide insulating layer (3) on the intermediate layer. The base material (1) is an electrical conductor. The chromium oxide containing layer (2) is so formed that the ratio of oxygen to chromium O/Cr is not less than 0.5 but less than 1.5 to avoid the formation of chromic oxide Cr.sub.2 O.sub.3 which reduces the adhesive bonding strength. The oxide insulating layer (3) is formed by applying a precursor solution of a metallic oxide onto the chromium oxide containing layer (2) by a sol-gel method or an organic acid salt pyrolytic method.

Abstract: The present invention relates to an insulated wire comprising a conductor and at least two insulating layers provided on the outer periphery of the conductor. The inner insulating layer is provided directly or via another insulation on the outer periphery of the conductor and comprises a polyolefin compound containing 20 to 80 parts by weight of at least one substance selected from ethylene .alpha.-olefin copolymer, ethylene .alpha.-olefin polyene copolymer (.alpha.-olefin having the carbon numbers of C.sub.3 -C.sub.10, polyene being non-conjugated diene).

Abstract: An insulated wire comprising a conductor and an insulating coating made from a polyamideimide base coating, which polyamideimide is made of an acid component and a diisocyanate component containing 10 to 80 % by mole of an aromatic diisocyanate compound of the formula: ##STR1## or which polyamideimide is made of an diisocyanate component and an imidodicarboxylic acid that is a reaction product of an acid component and a diamine component, in which the diamine component contains an aromatic diamine compound of the formula: ##STR2## and/or the diisocyanate component contains the above aromatic diisocyanate compound in such an amount that a total amount of the aromatic diamine compound and the diisocyanate compound is from 10 to 80 % by mole based on the total amount of the whole diamine component and the whole diisocyanate component.

Abstract: An optical fiber preform includes a core made from a fluoride glass which is doped with a rare earth, and a cladding surrounding the core. The cladding is made from one of an oxide glass and a fluoroxide glass. The core has a characteristic of amplification at 1.3 .mu.m-band. The cladding does not have absorption at 1.3 .mu.m-band. The preform is useful as a material for a fiber optical amplifier in optical communication systems.

Abstract: This composite material with a fibrous reinforcement has refractory fibres (2) embedded in a nonmetallic matrix (4) and an interphase material (6) interposed between the fibres and the matrix, the interphase material being boron carbonitride with a lamellar or amorphous structure containing in atomic %, 0 to 98% nitrogen, 1 to 99% carbon and 1 to 99% boron. The composition of the interphase material can be homogeneous or vary gradually from the fibre-material interface (8) to the material-matrix interface (10).

Abstract: A composite is comprised of reinforcement fibers having a continuous coating of a metal diboride form the group consisting of titanium diboride, zirconium diboride, hafnium diboride, aluminum diboride, and mixtures thereof, and a molten silicon infiltration formed silicon carbide matrix. The reinforcement fibers are fibers from the group consisting of elemental carbon, silicon carbide, and mixtures thereof. A method for forming the fiber reinforced composite comprises depositing a continuous coating of the metal diboride on the fibers. A carbonaceous material is admixed with the coated fibers so that at least 5 volume percent of the mixture is the fibers. The mixture is formed into a preform having an open porosity ranging from about 25 volume percent to about 90 volume percent of the preform. The preform is heated in an inert atmosphere or partial vacuum, and infiltrated with molten silicon to produce an infiltrated product having the composition of the composite.

Abstract: A protective coating for a reinforcement phase exposed to molten silicon or silicon alloy infiltrant comprises, an inner layer material resistant to reaction with the molten infiltrant, an interlayer of a reactive material that reacts with the infiltrant to form compounds having a melting temperature greater than the infiltrant, and an outer layer material resistant to reaction with the molten infiltrant. Materials resistant to reaction with molten silicon are a metal carbide from the group consisting of carbides of titanium, hafnium, zirconium, and tantalum; a metal nitride from the group consisting of nitrides of boron, silicon, aluminum, titanium, zirconium, hafnium, niobium, and tantalum; a metal boride from the group consisting of borides of titanium, zirconium, hafnium, silicon, and aluminum, or combinations thereof.

Abstract: The invention contemplates a light-sensitive silver halide photographic element having at least one silver halide containing emulsion layer on a film base, the film base being a coextruded laminate having a first layer and a second layer, the first layer being a polyester of an aromatic dicarboxylic acid or a dialkyl ester thereof and an alkylene glycol adjacent to the emulsion layer, the second layer being a polyester having a humidity expansion coefficient greater than 5.times.10.sup.-5 ##EQU1## (RH is relative humidity) and a Young's modulus at 50% relative humidity greater than 300 kPSI.

Abstract: A coating comprising a non-porous textured corrosion resistant and abrasion resistant base layer of metal is applied by a thermal flame spray process using a high-velocity oxy-fuel, and a top coating of a continuous film of fluoropolymer is used to enhance and protect the surface bare metal on industrial rollers in a multitude of industrial environments that are corrosive, abrasive or otherwise have elements present which tend to stick to the roller surface. The corresponding method comprises the steps of providing a body member having a relatively soft and corrodible metal first layer, applying a middle metal layer to the first layer by a high-velocity oxy-fuel type metal thermal spray process, applying an outer layer comprising a fluoropolymer coating over said middle layer to provide a non-sticking characteristic to the coating; and heating said outer layer to a level above the curing temperature of the fluoropolymer so as to bond the fluoropolymer to said middle layer.

Abstract: A composite comprising a ceramic matrix having immersed ceramic reinforcing fibers is strengthened and toughened by providing a multi-layer ceramic coating surrounding each fiber. The multiple layers in the fiber coating are not bonded to one another. As a result, the multiple layers separate from one another in the presence of an advancing crack in the ceramic matrix, thereby permitting the fibers to pull out of the matrix and avoid premature fiber breakage. The choice of materials for the fiber coating is not limited by any requirement to establish a particular type of chemical bond between the coating and the fiber. Instead, the invention relies only upon the mechanical tendency of the unbonded multiple layers in the fiber coating to separate to promote fiber pull-out from the matrix in the wake of an advancing crack.

Abstract: The invention provides plastic material for wrapping or carrying food such as meat and vegetables without causing propagation of bacteria and germs.The plastic material includes: a synthetic resin; and carbon fibers which are grown on fine powder of a refractory metal or a derivative thereof by thermolysis of hydrocarbons or vapor growth and plated with a metal laminate. A synthetic resin having sufficient flexibility is used as a base thereof when the plastic material is applied to a wrapping film, whereas a solid and tough synthetic resin is used when the plastic material is applied to a food-carrying member like a container or a tray. The metal laminate of the material gives excellent germicidal power to the material, and the ordered graphite structure of the carbon fibers gives sufficient strength to the material.

Abstract: A polyurethane magnet wire comprising a conductor having provided thereon a polyurethane insulation coating, wherein the total amount of the phenolic compounds contained in organic compounds which evaporate from said coating by heating at 280.degree. C. for 2 minutes is 0.2 wt % or less based on the weight of the coating and the total amount of the organic compounds is 2 wt % or less based on the weight of the coating; and an electric relay comprising such a wire.

Abstract: Hybrid and commingled yarns containing reinforcing fibers and thermoplastic matrix fibers when sized with a dispersion or emulsion having a dispersed phase containing a thermoplastic compatible with the thermoplastic of the matrix fibers but having a lower melting point allow preparation of thermoplastic matrix fiber reinforced composite structures at reduced consolidation temperatures, cycle times, and/or consolidation pressures without loss of composite physical properties.

Abstract: A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a flexible graphite tape, longitudinally corrugated and folded into at least two longitudinally extending partially superimposed layers. Preferable, each strand is overknitted with a reinforcing wire, the strands in the core are braided, and a jacket, which includes a carbide fiber, an inorganic fiber, and a phenolic fiber, is disposed about the core.

Abstract: A ceramic fiber/ceramic matrix composite has ceramic fibers and a porous coating on the fibers. A ceramic matrix contacts the porous coating, the fiber and coating being immersed in the ceramic matrix. The porous coating is selected from the group including Si.sub.3 N.sub.4, SiC, ZrO.sub.2, Al.sub.2 O.sub.3, SnO.sub.2 and Ta.sub.2 O.sub.5. The pores are generally empty so as to render the coating frangible to promote fiber de-bonding and pull-out in the wake of an advancing crack in the matrix. In order to keep the pores empty, a non-porous sealing layer is formed over the porous coating which closes the pores without filling them. The ceramic matrix remains generally outside of the pores, whereby said pores remain empty after the fiber and coating are immersed in the ceramic matrix.

Abstract: A self-bonding insulated wire and a coil formed therefrom are disclosed, which wire comprising a first fusion-bonding film comprising a polyhydroxyether resin having a glass transition temperature of not lower than 90.degree. C. provided on an insulating film on a conductor; and a second fusion-bonding film comprising a polyamide copolymer resin having a melting point of from 50.degree. to 150.degree. C. provided further thereon, the second fusion-bonding film comprising the polyamide copolymer resin making up from 5% to 40% by film thickness of the entire fusion bonding films.

Abstract: The present invention is directed to a method wherein fibers are treated with a first, second, and third treatment solution. The third treatment solution includes a chlorinated rubber and a rubber-containing composition having acrylonitrile-butadiene rubber or hydrogenated acrylonitrile-butadiene rubber. The treated fibers are positioned contiguous, and adhered, to an unvulcanized hydrogenated acrylonitrile-butadiene rubber composition which is then vulcanized. The resulting rubber-fiber composite exhibits improved adhesion between the hydrogenated acrylonitrile-butadiene rubber composition and the fibers. Adhesion is maintained in a hot environment even if subjected to what would conventionally be considered conditions that would result in thermal deterioration under high temperature. Thus, the rubber-fiber composite exhibits enhanced durability under the severe service conditions experienced by rubber-fiber composites.

Abstract: A composite material containing carbon is protected against oxidation by forming, on the composite material, an inner layer, an intermediate layer containing boron or a boron compound, and an outer layer of silicon carbide. The inner layer formed on the composite material before the intermediate layer is formed, is made of a refractory carbide that does not contain boron and that is at least 60 microns thick, said inner layer insulating the intermediate layer from the carbon contained in the composite material.

Abstract: Diamond and ceramic whiskers 712 are grown on diamond, ceramic, or metal coated 714 fibers 710 (e.g. carbon, glass, ceramic or metal fibers) and used in composites 700. The whiskers 712 1) increase fiber-matrix bonding, 2) maintain fiber separation and 3) provide uniform fiber distribution. The coating 714 1) improves the mechanical properties of the fiber and 2) protects the fiber 710 from corrosive attack by the matrix material 720. A catalytic process for growing whiskers 712 allows fiber strength to be maintained during the whisker growth process. Composite materials made with whiskered or coated and whiskered fibers are useful whenever light-weight and high strength materials are required.

Abstract: There is provided a rubber/plastic insulated power cable or a joint of power cables which comprises a conductor or a conductor joint having an inner semiconductor layer and an insulation layer, and if necessary, an outer semiconductor layer, formed thereon in the order named, at least one of these layers being formed of a crosslinked structure of an olefin resin composition containing an olefin resin, an organic peroxide, and 2,4-diphenyl-4-methyl-1-pentene. The 2,4-diphenyl-4-methyl-1-pentene serves to inhibit "amber" of the olefin resin composition by the organic peroxide used and to increase the degree of crosslinking of crosslinked structure. Also, the olefin resin with a high melting point can be used as a base resin. Therefore, the resultant power cable and joint have highly improved AC breakdown strength, impulse breakdown strength at a high temperature and much less generation of electrical trees due to "amber", so that they are useful particularly high-voltage application.

Abstract: The invention relates to articles consisting of highly oriented polyolefins having an ultrahigh molecular weight of more than 600,000 g/mol (weight-average molecular weight), especially filaments, fibers, yarns, fabrics and films, having good wetting and adhesive properties, especially on conventional matrix materials, which have been subjected to a plasma treatment of their surface, and also to a process for producing these articles and to their use for the manufacture of composites with the use of conventional matrix materials. In these composites, yarns according to the invention, for example, show a substantially higher adhesive strength than corresponding yarns which have not been plasma-treated, their tensile strength not being impaired by the plasma treatment.

Abstract: A composition useful in the manufacture or cable comprising:(i) a copolymer comprising ethylene and one or more alpha-olefins having a density equal to or less than 0.915 gram per cubic centimeter;(ii) a metal hydrate flame retardant compound;(iii) a styrene-ethylene-butylene-styrene triblock copolymer; and(iv) optionally, an impact polypropylene copolymer or polypropylene.

Abstract: A pelletizer feed roller comprises a metal core having a ceramic layer with a rough outer surface bonded to the core. The outer surface of the ceramic layer is sealed with a penetrating sealer containing organic solvent and phenolic resin to prevent moisture contamination of the ceramic layer without adversely affecting the coefficient of friction of the feed roller.

Abstract: A wire construction comprising an electrically conductive core, two polymeric insulation layers and a layer of fiber braid between the insulation layers, characterized by excellent flexibility and resistance to cut-through and arc propagation.

Abstract: The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having a coating of at least three layers, wherein the layers are alternately A-material layers of the general formula:Al.sub.x O.sub.y N.sub.zwherein x is up to about 60 atomic % of the coating;y is from about 20 atomic % to about 55 atomic % of the coating; andz is from about 5 atomic % to about 45 atomic % of the coating, with the proviso that x+y+z=100, and B-material layers comprising a metal alloy, such that the first and last layers of the coating are A-material layers. The invention further relates to a high strength, high temperature performance composite containing the above-specified coated reinforcement.

Abstract: A layer (16) forming interphase in a material having a lamellar structure is situated between the fibers of the texture and the matrix, and at least one layer (14) forming control interphase is situated between the surface of the fibers (10) and the lamellar interphase (16) in such a way as to define, for those cracks which have spread through the matrix (18) and the lamellar interphase (16), a preferential propagation zone away from direct contact with the actual fibers (10).

Abstract: This invention is concerned with security paper for bank notes, cheques and like documents in a security strip of enhanced security which is more difficult to counterfeit than the present bank notes containing window threads.

Abstract: An article comprising a non-conductive substrate which is coated with a sub-micron thickness of an oxidizable metal and overcoated with a microporous layer of an inorganic electrically insulative material. Optionally, the oxidizable metal-coated substrate may be sulfurized and/or further coated with (i) a promoter metal which is galvanically effective to promote the corrosion of the oxidizable metal, discontinuously coated on the oxidizable metal coating, and/or (ii) a salt, to accelerate the galvanic corrosion reaction by which the oxidizable metal coating is oxidized, prior to overcoating with the microporous insulative layer. Also disclosed is a related method of forming such articles, comprising chemical vapor depositing the oxidizable metal coating on the substrate and contacting the metallized substrate with a sol gel dispersion of the inorganic electrically insulative material which then is dried under suitable conditions to form the microporous layer on the substrate.

Abstract: A filter for removing particulate matter from high temperature flowing fluids, and in particular gases, that is reinforced with ceramic fibers. The filter has a ceramic base fiber material in the form of a fabric, felt, paper of the like, with the refractory fibers thereof coated with a thin layer of a protective and bonding refractory applied by chemical vapor deposition techniques. This coating causes each fiber to be physically joined to adjoining fibers so as to prevent movement of the fibers during use and to increase the strength and toughness of the composite filter. Further, the coating can be selected to minimize any reactions between the constituents of the fluids and the fibers. A description is given of the formation of a composite filter using a felt preform of commercial silicon carbide fibers together with the coating of these fibers with pure silicon carbide. Filter efficiency approaching 100% has been demonstrated with these filters.

Abstract: Fire retardant and water blocking material for cables having an admixture, in parts by weight, of 100 parts of amorphous polypropylene, which is in a continuous phase throughout the composition, from 10 to 70 parts of hydrated inorganic oxide or hydroxide material, and an organic halogenated material and antimony trioxide, the aggregate of the organic halogenated material and antimony trioxide being from 5 to 30 parts.

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.