Abstract: A hermetically sealed optical fiber product comprising a fluoride or other non-silica based glass optical fiber and a hermetic coating of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to the optical fiber product.

Abstract: A flame-retardant composition is prepared by mixing 100 parts by weight of a rubber or plastics free from any halogen with about 50 to about 200 parts by weight of magnesium hydroxide having an average particle diameter of about 0.3 to about 2 .mu.m and about 5 to about 50 parts by weight of carbon black powder having an oil absorption of about 0.5 to about 2.0 ml/g, and then cross-linking the mixture with an organic peroxide, sulfur, or a sulfur compound as a vulcanizing agent. By forming an electrical insulation and/or a sheath of the flame-retardant composition, there is provided a flame-retardant cable of the type including a cable core composed of an electric conductor coated with the electrical insulation or a plurality of such cores twisted together and covered, together with a filler, with the sheath.

Abstract: A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 .mu.m thick and from 150 to 200 .mu.m wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately, the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric.

Abstract: The present invention is a fibrous monolithic ceramic product of high deny and a process for making the product. The product has a microstructure of coated fibers with planes of weakness between a core of each coated fiber and its respective coat or between each coated fiber and adjacent coated fibers, thereby toughening the product. The planes of weakness are sufficiently weak to deflect a crack from normal to the plane of weakness to a direction parallel to the plane of weakness. The green body from which the product is formed, can be plastically deformed at room temperature, formed in near-net-shape, and densified by pressureless sintering.

Abstract: A fluorine-containing elastomeric electric insulating material is disclosed. The material is a vulcanized product of a composition comprising 100 parts by weight of a fluorine-containing elastomeric copolymer having a number average molecular weight of from 20,000 to 60,000, containing as major components a unit based on tetrafluoroethylene and a unit based on an .alpha.-olefin having 2 to 4 carbon atoms and exhibiting rubber elasticity at room temperature, 0.1 to 5 parts by weight of an organic peroxide and 0.1 to 20 parts by weight of a polyallyl compound.

Abstract: A method for manufacturing a silicon carbide fiber reinforced glass composite, which comprises either dipping silicon carbide fibers in molten glass in a tank, the molten glass being given wave vibration of 10-30 KHz by a supersonic vibrator provided with a cooling means to unravel the silicon carbide fibers and have the molten glass permeated therebetween, or plasma melt ejecting glass powder onto silicon carbide fibers to obtain a silicon carbide fiber/glass preform, molding the preform into a predetermined form and then subjecting the molded preform to thermal molding thereby to manufacture the silicon carbide fiber reinforced glass composite in the form of a molding.

Abstract: A metal-coated substrate, e.g., of glass, ceramic, or a hydroxy-functionalized material, wherein the improvement comprises a polysilicate, titania, or alumina interlayer between the substrate and the metal coating. The interlayer may have a porous microstructure, e.g., a polysilicate interlayer with an average pore size on the order of 50-150 Angstroms.Such articles, e.g., in the form of metal-coated fibers, may suitably be employed as reinforcing media in material composites having utility in structural applications, such as EMI shielding elements.Also disclosed is a corresponding method for forming a metal coating on a substrate by the provision of an interlayer of the above type. The interlayer may suitably be formed by applying to the substrate a sol gel dispersion of the polysilicate, titania, or alumina material, followed by drying of the applied dispersion.

Abstract: A method for hermetically sealing a silica based fiber product after the fiber product has been drawn from a melt or preform wherein a hermetic layer of boron carbide or a ceramic compound having a density of above about 4 g/cc is deposited upon the fiber product. The fiber product can be initially coated with carbon or boron carbide prior to the application of the ceramic compound. Also, a method for making such fiber products using these methods, and the resultant hermetically sealed fiber products produced thereby.

Abstract: This invention concerns a heating pipe for panel heaters disclosed on walls, ceilings or floors to heat a room. The pipe is essentially constructed of a pipe itself, an electric heating wire running through it and aluminum granules stuffed between the two. Because of the simple structure, the production, the installment and the maintenance costs are cheap; as a matter of course, there is no additional need of a circulation pump for heating media and safety devices to watch the leak of heating media or the break of the pipe. Moreover, because spherical aluminum granules are closely packed, the heat conductivity is very good, which minimizes the heat loss and reduces the time to heat up a room. Also, the heat capacity is so small that frequency room temperature control by means of an automatic on-and-off mechanism has becomes possible.

Abstract: A combustible gas sensor element prepared by the process of applying, to a sheathed wire coil, separate coats of catalytic wash each heated in a furnace, separate and alternating coats of porous ceramic and platinum each heated by passing an electric current through the coiled wire filament, and separate coats of porous ceramic top coating, each heated by passing an electric current through the filament.

Abstract: A continuous, bicomponent, non-vitreous ceramic fiber comprises components existing in a longitudinal side by side relationship wherein each of the components is derived from a different fiber-forming precursor liquid. Firing the bicomponent fibers in a reducing atmosphere can provide ceramic/cermet or cermet/cermet fibers wherein each cermet component has a graded composition.

Abstract: Very high levels of insulation resistance and of insulation resistance stability of insulating compositions having polyolefin bases and having polar organic additives are achieved in this invention. The polar organic additives can be organic halogenated flame retardants, such as decabromodiphenyl oxide. The surprising increase in insulation resistance and in insulation resistance stability is achieved by addition of certain antioxidants in combination and, particularly, the addition of a zinc salt of mercaptoimidazole and a sterically hindered di-tertiary butyl phenol. The composition may be crosslinked by radiation or even by chemical means as through use of organic peroxides without loss of the surprisingly increased insulation resistance and insulation resistance stability.

Abstract: A series of protective layers, particularly adapted to application by flame spray processes, provides reliable fouling and corrosion protection against an underwater environment. The construction of the multiple layers provides an underlying galvanic layer and an exposed but intermittent layer providing fouling protection. The two protective layers are electrically insulated by an intervening insulating layer. In the preferred embodiment, the layers are applied by a flame spray process, with partial masking of the final application to provide an intermittent layer. Thickness of layers can be easily varied to provide optimum protection against both fouling and corrosion in a variety of environments.

Abstract: To reduce the tendency of ground faults and short circuits on electrical heating elements operating at elevated voltages and temperatures, resistance heating wire is coated with a sublayer of magnesium zirconate followed by an outer layer of aluminum oxide; each layer being in the range of 0.001 to 0.010 inches thick.

Abstract: A polyamino-bis-maleimide prepolymer solution obtained by the reaction of 1 mole of N,N'-4,4'-diphenyl methane-bis-maleimide with 0.25 to 0.4 mol of 4,4'-diaminodiphenyl methane in an alkyleneglycol monoalkyl ether as a solvent at elevated temperatures. This solution can be impregnated with a substrate to form a prepreg. The prepreg can be laminated to form heat resistant laminate.

Abstract: Superconducting fiber bundle which contains a multiplicity of carrier fibers such as, for instance, carbon fibers, boron fibers, steel fibers coated with a superconducting layer of a niobium compound of the general formula NbC.sub.x N.sub.y O.sub.

Abstract: A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 .mu.m thick and from 150 to 200 .mu.m wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric.

Abstract: A decorative composite article which may be longitudinally slit to form a yarn product is disclosed which has a combined a phosphorescent and retroreflective decorative appearance. The composite article includes a phosphorescent film component prepared from a thermoplastic resin base having a phosphorescent colorant disposed on the outer directed surface. The phosphorescent film component is laminated to a retroreflective film component comprising a thermoplastic resin base containing a quantity of reflective glass beads or lenses bonded thereto. The retroreflective film component bears a layer of an adhesive composition on its free surface, which is oriented during lamination to enter adhesive engagement with the uncoated surface of the phosphorescent film component.The composite article prepared in accordance with the present invention offers improved flexural strength in combination with a unique decorative appearance that combines the benefits of phosphorescent activity with direct reflective capability.

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: 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 new and improved method for preparing a fire resistant electrical-conductor is disclosed in which a length of a metal core conductor is first wrapped with a mica-impregnated glass tape to form a continuous first layer, and then an outer coat of a heat-curable platinum catalyzed silicone rubber composition is applied around the tape layer which is cured to form a fire resistant insulation for the electrical conductor. The insulated conductors of the invention provide circuit integrity under fire and may be useful in critical circuitry such as fire alarms and elevators.

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: Composite protective coatings for protecting carbonaceous substrates from degrading in oxygen containing environments are provided. The composite protective coatings include a first coating layer applied to the surface of the substrate. The first coating layer is a silicon carbide type coating. The second coating layer is applied to the surface of a first coating layer and is a sputter deposited phase stabilized zirconium oxide having a columnar microstructure. Carbonaceous substrates having the composite protective coatings are able to withstand temperatures of about 4100.degree. F. in oxygen containing environments.

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: There is disclosed an oxygen gas permselective membrane comprising a film of a water-containable or wettable metallic oxide.The oxygen gas permselective membrane according to this invention, though being very thin, does not allow water vapor and carbon dioxide gas in air to permeate therethrough and has a great function for allowing oxygen gas to selectively permeate therethrough.

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: Disclosed are crosslinked elastomeric compositions particularly suitable as a jacketing material for plenum cable. The compositions are based upon a mixture of an elastomeric component comprising an elastomeric copolymer of ethylene and methyl acrylate containing carboxylic crosslinking sites and from about 180 parts to about 350 parts by weight of at least one filler per 100 parts by weight of the elastomeric component to provide a limiting oxygen index of at least about 45 percent. Although the compositions may contain further additives such as processing aids, crosslinking agents, anti-oxidants, plasticizers and flame retardants, they are able to meet or exceed the flame spread and optical density requirements of Underwriters Laboratories UL 910 Tunnel Flame Test for electrical plenum cable jacketing material without the necessity of containing halogens.

Abstract: A heat-resistant insulated electric wire and cable which comprises an electric conduction; the first coating layer thereon consists of a mixture of a binder and a finely ground and unmelted inorganic substance; and the second organic insulating coating layer formed on the first coating layer. Said heat-resistant insulated electric wire can advantageously be used for a coil of a magnet or a motor.

Abstract: A flame resistant insulated electrical wire and/or cable construction formed by wrapping a wire or cable conductor with a heat resistant flexible refractory tape comprising a porous base fabric, preferably a knit fiberglass fabric that has been coated and impregnated with refractory materials. These refractory materials are bonded to both the surface and interstices of the base fabric by means of a bonding agent, such that the fabric remains flexible and retains its stretch properties. In the presence of relatively extreme temperature and heat (e.g., above 1750.degree. F.), the bonding agent will decompose without flaming, while the refractory materials will fuse into the softened surface of the knit fiberglass base fabric forming a high temperature resistant structure with ceramic qualities and insulative properties.

Abstract: The invention relates to a chrysotile asbestos fiber substantially coated on its exterior surface with hydrated titanium dioxide, the titanium dioxide content being from 0.5 to 35% by weight, part of the titanium dioxide being chemically bonded to the asbestos fiber and the remaining titanium dioxide being retained by electrostatic bond, said modified fiber having an Mg:Si ratio of from less than 3:2 to 2:2 when calculated on an atomic number ratio, a Ti:Si ratio of from more than 0:2 to less than 1:2 and said modified fiber being also characterized by an infrared spectrum wherein the relative peaks at 1082, 1025 and 957 cm.sup.-1 have been substantially altered in their intensity and as shown in curves C and D of FIG. 1 , said fiber resisting leaching of the Mg ions by strong acids 3 to 6 times better than natural asbestos fibers and resisting leaching of SiO.sub.2 groups in strong alkali media 1.5 to 3 times better than unmodified chrysotile fibers.

Abstract: Longitudinally water-tight cables, such as communication cables, are produced so that the interior of such cables have a filling material containing a water-repellant substance and relatively small diameter gas bubbles embedded in the filling material. The filling material is thickened with a reticulating thixotropic substance having a 3-dimensional network-like structure which is disruptable under mechanical influence and is regenerable over a time span in a motionless state with a significant increase of viscosity. The size of the gas bubbles are adjusted relative to the resistance to disruption of the network-like structure so that the buoyancy of such gas bubbles is significantly below such resistance to disruption in the motionless state of the filling material whereby such gas bubbles are maintained in their respective positions within the filling material in a time-stable manner during a motionless state.

Abstract: Disclosed are telephone cable filling materials and telephone cables comprised of a plurality of insulated electrical conductors twisted together to form a core in which there are a multiplicity of interstices between the insulated electrical conductors filled with the cable filler materials. The filling materials are composed of a petrolatum base material and inorganic microspheres and can be divided into two groups: (1) a first group to fill cables used at temperatures below the melting point of the petrolatum and (2) a second group to fill cables that may be used above that temperature. The first group is composed of mixtures of 40 to 90 weight percent petrolatum and 1 to 60 weight percent inorganic hollow (air filled) microspheres. When mixtures from this group are used as a filler in a telephone cable, the filler has a drip point nearly equal to the average melting point of the petrolatum, normally 57.2.degree. C. The second group is composed of two embodiments.

Abstract: Disclosed are materials used to fill electrical and light waveguide transmitting communications cables to make them waterproof. The filling materials have superior waterproofing, dielectric and handling characteristics and are made from compounds of styrene-ethylene-butylene-styrene, styrene-butadiene-styrene or styrene-isoprene-styrene type block copolymers dissolved in paraffinic or naphthenic type mineral oils with a minimal content of aromatic hydrocarbons, inorganic hollow microspheres and, if desired, an additive such as low molecular weight polyethylene or glycerol hydroxy stearate.

Abstract: Novel bi-metallic filamentary composites are produced by first forming a conjugate precursor filament comprised of an organic polymer together with particles of a first reducible metal oxide and particles of a second reducible metal oxide with the metal component of each of the two metal oxides being sinterable at a temperature which is below the melting point of the other. The structure of the precursor is characterized by a first longitudinally extending layer along its length which contains the particles of the first reducible metal oxide, and an adhering second essentially distinct longitudinally extending layer extending along its length which contains the particles of the second reducible metal oxide. The essentially discrete layers may be in a sheath-core arrangement or in side-by-side relationship.

Abstract: This invention relates to a surface-coated sintered hard body comprising an alloy consisting of at least one of carbides and carbonitrides of Group IVa, Va and VIa transition metals, cemented by at least one of metals and alloys, and two interior and exterior coated layers, the interior layer being a monolayer or multilayer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part of the non-metallic element or elements are optionally replaced by oxygen, and at least one layer of the interior layer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part or all of the non-metallic element or elements are replaced by boron, and the exterior layer consisting of at least one of aluminum oxide, zirconium oxide and mixtures or compounds thereof.

Abstract: To make imitation coal elements, in the form of pellets or lumps which will glow and radiate heat effectively when heated by a gas flame in an open-type firegrate, use is made of raw ceramic bulk fibers. An appropriate mass thereof is moistened with a stiffening agent such as potato starch and is then squeezed to shape it into its pellet or lump shape and to express any excess stiffening agent; then it is baked to set the stiffening agent and fix the shape of the pellet or lump. Thereafter the element is colored by use of a black metallic oxide/colloidal sodium silicate impregnant which is applied twice in successive dipping and baking operations.

Abstract: A self-extinguishing fire-protective composition is disclosed. The composition includes a water-based resinous emulsion, organically bound halogen, clay and a low temperature fiber such as glass or organic fibers.

Abstract: A coated article comprising a metal support and a baked layer of a water soluble heat-resistant insulating varnish containing a resin comprising ester groups and imide rings in the molecule dissolved in water using a volatilizable basic compound, the resin comprising the reaction product of(A) a carboxyl-containing polyesterimide resin having an acid value of about 30 to 150 obtained by reacting (a) a polyhydric alcohol component comprising at least one organic polyhydric alcohol and containing about 10 to 60 mol % of an imide ring-containing glycol of the general formula (I): ##STR1## wherein R.sub.1 is a trivalent aromatic group, R.sub.

Abstract: A formulation which may be applied to a substrate to produce a flexible, high temperature, thermally stable and color stable film thereon. The formulation comprises a poly(1,3-imidazolidine-2,4,5-trione) polymer, a free radical scavenger in an amount sufficient to inhibit cleavage and cross-linking of the polymer by action of oxygen thereon, and a solvent for the polymer. Also disclosed are a method for applying a flexible, high temperature, thermally stable and color stable color coating to a polyimide substrate; the substrate so coated; and an insulated conductor assembly having a polyimide insulative cover and an imidazolidine trione based-top-coating over the cover.

Abstract: Recording paper for use in, for example, an electrostatic recording system, comprising an electrically conductive base layer, a photoconductive or dielectric recording layer disposed on one surface of the base layer, and a heat-sensitive bonding layer disposed on the other surface of the base layer. The bonding layer is non-tacky at normal temperature, and it develops tackiness when heated after a recording has been made on the recording paper.

Abstract: Water repellant fabrics and methods of making them from yarns which have been given a water repellant treatment prior to incorporation into the fabric. A typical fabric is woven from a repellant treated polyester and polypropylene.

Abstract: A composite metal wire saw having a thin wire core and integral therewith hard cutting crystals with cutting edges projecting irregularly from the wire core surface. The cutting crystals form a layer between 1.5 and 10 .mu.m. Preferably, the composite saw has an intermediate fine-grained layer between 1 and 5 .mu.m and being thinner than the surface layer. The composite saw is prepared by heating the core wire and depositing the cutting crystals from the vapor phase.

Abstract: Ceramic color compositions which are moisture or steam settable are described. The compositions are formulated from a dispersion of ceramic pigments or glass colors in certain moisture or steam set type vehicles and can be applied to green or bisque ceramic ware using standard decorating techniques and then set to a coating by exposure to moisture or steam. Over-glazing of the coating provides decoratively glazed ware of excellent quality and durability.

Abstract: A fibrous structure, for example, a batt, mat, blanket, felt, cloth, paper or board, comprising staple fibers of polycrystalline alumina, alumina/silica, or zirconia having an average diameter of 0.5 to 5 microns, not greater than 20% by number of the fibers having a diameter greater than 5 microns and the shot content of the fibers being less than 5% by weight.

Abstract: A substrate such as glass contains a coating of a transition metal oxide complex with an ortho functional aromatic compound which contains a functional group which can react with a phenolic or resorcinolic resin or other organic compound or polymer. The ortho functional aromatic compound can also be a phenolic or resorcinolic resin. The complex serves as a coupling agent between the substrate and the organic material. These coupling agents can be resinous coatings or they can be coatings which serve as a coupling agent type of composition for rendering the surfaces of the substrates more substantive or reactive to organic materials. The coatings are inorganic-organic complexes of a transition metal oxide or a hydroxide with an ortho functional aromatic compound. The aromatic compound can contain at least two functional groups in ortho position to each other and a functional group for interfacing or reacting with the organic material.