Abstract: A hot melt magnetic sealant that exhibits improved adhesion to oil covered galvanized ferrometallic substrates and to epoxy electrodeposition coated ferrometallic substrates is disclosed. The sealant comprises magnetic filler particles, a hydrocarbon resin, a tackifier resin, a plasticizer, an epoxy resin and an epoxy curing agent. A method for making a hot melt sealant tape comprising mixing a formulation of magnetizable particles, a hydrocarbon resin, a tackifier resin, a plasticizer, an epoxy resin and an epoxy curing agent, extruding the mixture to form a tape and exposing the tape to an electromagnetic field is also disclosed. Methods for using the magnetic sealant tape to seal a joint between ferrometallic members having oil covered galvanized surfaces or epoxy electrodeposition coated ferrometallic members comprising disposing the tape to cover the joint and heating the tape are also disclosed.

Abstract: The present invention discloses a method for determining the level of contamination in electrical cable insulation. This is achieved by extruding the cable insulation about the conductor and simultaneously producing a thin ribbon of the insulation which is then screened via a laser beam for contaminants.

Abstract: A magnet wire enamel based on polyamide resins is disclosed in which the molecular weight of the polyamide resin is reduced through an equilibration reaction with a solvolytic agent and a titanate catalyst. Also disclosed is a method of applying said enamel to a magnet wire substrate and the resulting enameled magnet wire.

Abstract: The present invention comprises a high density, moisture resistant, high temperature stable mica laminate. Said laminate comprises a plurality of mica papers, impregnated with a polysiloxane binder containing a titanate and naphthenate. A process of preparing said mica laminates is also disclosed. The laminates of this invention have exceptional structural qualities, moisture resistance, stain resistance, and densities of 1.5 g/cc or greater.

Abstract: A gas generating apparatus and method is described which utilizes a novel catalytic oxygen evolving electrode for such electrochemical systems as electrolysis cells and oxygen concentration cells. The electrochemical cells include a catalytic cathode and an improved catalytic anode positioned on opposite sides of, and in electrical contact with, a cation exchange membrane. A source of direct current potential between the cathode and the anode and means for removing gas from at least one of the electrodes are provided. The improved catalytic anode is a ternary platinum group reduced metal oxide alone or in combination with platinum group metals and/or platinum group metal oxides or mixtures of the foregoing having at least one valve metal component such as titanium, hafnium, zirconium, niobium, tantalum and tungsten.

Abstract: A low temperature heat shrinkable ethylenepropylene diene terpolymer tubing is described which has a texturized surface. Upon applying the heat shrinkable tubing to a complex shaped object and exposing it to temperatures below 85.degree. C., the tubing shrinks radially, linearly and uniformly so as to preserve the texturized friction surface, shrinking over depressions and expansions of the complex surface without wrinkling. In addition, a low temperature semiconductive heat shrinkable tubing is also disclosed.

Abstract: This invention is for a resin rich, electrically insulating tape comprising a layer of mica and at least one layer of an electrically insulating scrim, wherein the tape is impregnated with an epoxy-phenolic novolac resin having about 0.1 percent to about 0.5 percent by weight of the mica of an alkoxy titanate. The tape will have an excellent shelf life, rapid cure to form stability and superior moisture resistance. Also described is a method for manufacturing such a resin rich tape.

Abstract: The present invention is directed toward a highly flexible, silicone rubber coated inorganic yarn based sleeving and a process for making the invention comprising an inorganic yarn sleeving, i.e., glass fibers, formed into a sleeving which is then coated with a highly flexible silicone rubber which has a Shore-A durometer reading of about 40 or less of the cured silicone material.

Abstract: A composite material suitable for use as an abradable seal is described. The seal comprises a high temperature stable fiber reinforced glass or glass-ceramic matrix base having at least one layer of abradable ceramic material, plasma sprayed or bonded to it. The ceramic abradable layer has a working temperature up to at least 3000.degree. F. (1648.degree. C.) and is oxidatively stable. The abradable seal has particular utility in a gas turbine engine.

Abstract: An improved magnetic sealant is disclosed wherein the improvement comprises the introduction of magnetizable particles having a particle size of about 150 microns or larger into the resin. It has been found that the larger particle sizes allows for the introduction of increased amounts of magnetic particles into the resin without the loss of flow properties. This results in a sealant which will have strong magnetic properties but will be an effective sealant for irregular surfaces as well as smooth ones. Also disclosed is a method for making the sealant and a method for using it.

Abstract: A hot applicable, heat expandable, thermosetting sealing composition particularly adapted for use in the automotive industry is disclosed. Such a sealant comprises a styrene-butadiene rubber mixed with conventional thermoplastic resin blowing agents, vulcanizing agent, oils and thickening agents wherein the addition of an activator selected from the family of sulfonamide materials results in a sealer which can be hot applied without causing it to prematurely blow or cross-link yet remain affixed to the component until such time as it is desired to blow and cure the sealant.

Abstract: A highly flexible mica insulating structure is disclosed which comprises one or more mica papers impregnated with about 5 percent to about 25 percent by weight of a flexible polysiloxane resin having about 1 percent to about 4 percent by weight of an alkoxy titanate and about 0.5 percent to about 2 percent by weight of a naphthenate based on polymer solids, said resin binder being partially cured or B-staged. Such mica products have excellent flexibility, structural integrity and improved moisture resistance.

Abstract: A hot applicable, heat expandable, thermosetting sealing composition particularly adapted for use in the automotive industry is disclosed. Such a sealant comprises a styrene-butadiene rubber mixed with conventional thermoplastic resin blowing agents, vulcanizing agent, oils and thickening agents wherein the addition of an activator selected from the family of sulfonamide materials results in a sealer which can be hot applied without causing it to prematurely blow or cross-link yet remain affixed to the component until such time as it is desired to blow and cure the sealant.

Abstract: A method of stabilizing thick honeycomb core composites is disclosed. The method comprises bonding a layer of resin impregnated woven grahite fibers to one surface of the honeycomb core, then curing the resin impregnates forming a stabilized honeycomb core. This stabilized core is then cut to net shape and the composite structure is formed by laying one or more resin impregnated fiber layers onto the stabilized core surfaces and curing the lay-up under heat and pressure forming the composite article. Also disclosed is a stabilized honeycomb subassembly formed by bonding a graphite fiber, resin impregnated layer onto one of the honeycomb core surfaces and curing the resins, then shaping the stabilized honeycomb core to the desired form.

Abstract: The present invention discloses a process of forming glass, glass-ceramic or ceramic matrix, fiber reinforced composite articles. The method comprises preparing both the matrix and the reinforcement into fibers, which are then chopped into relatively short lengths. These chopped fibers are then formed into hybrid felt papers comprising a mixture of both reinforcing fibers and matrix fibers. These felt papers are then cut into preforms and stacked one on top of the other to form a lay-up. The lay-up is then placed in a die and densified to form the composite article.

Abstract: This invention relates to a fuel cell vehicular power plant. Fuel for the fuel stack is supplied by a hydrocarbon (methanol) catalytic cracking reactor and CO shift reactor. A water electrolysis subsystem is associated with the stack. During low power operation part of the fuel cell power is used to electrolyze water with hydrogen and oxygen electrolysis products being stored in pressure vessels. During peak power intervals, viz, during acceleration or start-up, pure oxygen and pure hydrogen from the pressure vessel are supplied as the reaction gases to the cathodes and anodes in place of air and methanol reformate. This allows the fuel cell stack to be sized for normal low power/air operation but with a peak power capacity several times greater than that for normal operation.

Abstract: The present invention teaches a cloth covered pinch welt comprising a flexible, thermoplastic polymeric substrate extruded about a reinforcing member having a layer of partially embedded open cell foam material bonded to the polymeric substrate and wherein a cloth covering is bonded to the foam material. In addition a method for manufacturing the cloth covered pinch welt disclosed herein is also taught.

Abstract: A fiber reinforced composite flexbeam which has torsionally stiff inboard and outboard end portions which taper down to form a torsionally soft, resilient, solid medial web portion is disclosed. Such a flexbeam may be used as a structural member in rotor connectors for a rotary wing aircraft to connect the rotor blade to the rotor hub.

Abstract: A membrane fuel cell battery is described which is characterized by improved reactant flow distribution and heat removal. Internally cooled, bipolar, reactant flow defining assemblies separate the ion exchange membranes of adjacent cells. Coolant flow through the interior of the separator is controlled to cool one side more than the other. The cooler side of one separator contacts the fuel side of a membrane while the warmer side of the adjacent separator contacts the oxidant side. The temperature differential across the membrane minimizes drying of the fuel side of the hydrated cell membranes.

Abstract: An improved method of molding articles from air-laid webs wherein resin is deposited in a dry process onto cellulose fibers prior to air-laying. Cellulose material and a resin-containing airstream are simultaneously fed into a comminuting means such as a hammer mill. The cellulose particles thereby produced have a coating which adheres to the surface of the cellulose particles. The cellulose particles retain substantially all of the dry resin coating when pneumatically conveyed and air-laid into a web. The fiber web produced with the resin-coated particles is suitable for use in a conventional molding process whereby the web is molded under sufficient heat and pressure into a molded article having a uniform resin distribution resulting in improved strength and improved structural integrity.