Abstract: A palladium-based alloy is disclosed having a composition consisting essentially of nickel in the range of about 3 to about 30 atom percent, silicon in the range of about 15 to about 20 atom percent, the balance being palladium plus incidental impurities. The alloys of the present invention are particularly suited for joining stainless steels employed in orthodontic devices at brazing temperatures less than about 900.degree. C.

Abstract: A process for making a crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 30 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.

Abstract: A polyamide composition comprising an aliphatic polyamide such as nylon 6 and an oligomeric aromatic polyamide, such as oligomers of poly(tolylene diisophthalamide), which exhibit improved retention flexural modulus and flexural strength at ambient humidity, i.e. about 50% to about 65%.

Abstract: Optically active (optically non-linear or electro-optically active) waveguides are formed by depositing a layer of organic material, typically polymeric material, comprising one or more opticaly active components, and subjecting predetermined regions of the layer to actinic radiation to alter the refractive index of these regions.

Abstract: This invention relates to vinyl ether-based coatings for which properties such as color stability, thermal stability, mechanical stability, hydrolytic stability, and resistance to embrittlement may be maintained and properties hydrogen generation and blocking are minimized.

Abstract: Epoxy resin compositions used in preparation of laminates for electronic applications are free of the solvents typically needed in current industrial practice. The use of certain mono-substituted dicyandiamides makes possible the elimination of such solvents since all of the components are soluble in epoxy resin to an extent which provides uniform properties in the cured laminates.

Abstract: A method for converting Explosive D, i.e., ammonium picrate to oxygenated products, particularly hydroquinone or cyclohexanediol and ammonia by hydrogenation over a supported Group VIII metal catalyst. Preferably, the ammonium picrate is dissolved in a suitable solvent and then hydrogenated at a temperature of about 25.degree. to 250.degree. C., and a pressure of about 10 to 1000 psig (69 to 6900 kPa gauge) followed by separation of the commercially valuable products and ammonia.

Abstract: The present invention includes a polarizer element and an array of tapered waveguides in substantial contact with the polarizer element. The tapered end of each of the waveguides extends outward from the polarizer element. Each of the waveguides has a light input surface adjacent the polarizer element and a light output surface distal from the light input surface. The area of the light input surface of each of the waveguides is greater than the area of its light output surface. Also, the waveguides in the array are separated by interstitial regions with a lower refractive index than the refractive index of the waveguides. The present improved polarizer may be used in display devices, such as projection display devices, off screen display devices, and direct view displays. Such displays are used in a wide range of applications including computer terminals, airplane cockpit displays, automotive instrument panels, televisions, and other devices that provide text, graphics, or video information.

Abstract: This invention relates to a friction composition comprising oxidized or phoisphotized metal fibers and to friction elements fabricated therefrom.

Abstract: This invention relates to vinyl ether-based coatings for which properties such as color stability, thermal stability, mechanical stability, hydrolyric stability, and resistance to embrittlement may be maintained and properties hydrogen generation and blocking are minimized. The invention also relates to stabilizers which control these properties in the coatings.

Abstract: An improved fiber reinforced glass composite includes a carbon-coated refractory fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x ranges from about 0.5 to about 2.0, preferably 0.9 to 1.6 and y ranges from about 0.5 to 3.0, preferably 0.7 to 1.8. Preferably the black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group.

Abstract: A method for making multilayer laminates having at least one exposed layer of copper foil. The exposed layer of copper foil is covered with a adhesively attached protective metal sheet made of a copper prior to being laminated.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.

Abstract: A masking tape for use in masking a part in a high velocity oxy-fuel (HVOF) plasma spray process. The tape is formed from a fabric which is tightly woven from yarns of aramid fibers. A silicone rubber impregnates the inner fabric layer. First and second silicone rubber layers are coated onto opposite sides of the impregnated fabric. A first silicone pressure-sensitive adhesive, which is a rare metal cured adhesive, is coated onto the second silicone rubber layer. A second silicone pressure-sensitive adhesive is coated onto the first silicone pressure-sensitive adhesive. A release liner is preferably laminated to the second pressure-sensitive adhesive.

Abstract: A curable epoxide composition consists essentially of curable epoxides, dicyandiamide as a curing agent in an amount less than needed to fully cure the epoxides, an imidazole in an amount exceeding that needed as a catalyst and capable of curing the epoxides in combination with the dicyandiamide, a reactivity controller for the imidazole to reduce the curing speed, and a solvent. The use of undesirable solvents such as DMF is reduced. A glass transition temperature greater than 135.degree. C. is obtained in the cured composition and is maximized by balancing the amounts of dicyandiamide, the imidazole, and the reactivity controller.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing (a) a vinyl ether oligomer, and (b) mono and/or multifunctional vinyl ether monomers.

Abstract: This invention relates to a process for remediating vaporous pollutants which comprises passing a vaporous stream containing one or more of pollutants through a bioreactor, the bioreactor comprising a plurality of biologically active bodies, the biologically active body comprising a macroporous substrate and one or more of microorganisms capable of remediating one or more of said pollutants, wherein the substrate is fabricated from a decomposition-resistant material. The present invention further provides an apparatus for this process.

Abstract: A method for converting hydrazine and/or substituted hydrazines, particularly unsymmetric dimethyl hydrazine (UDMH), to ammonia or ammonia and the corresponding amines by hydrogenation over a supported Group VIII metal catalyst. Preferably, the hydrazines are dissolved in a suitable solvent and then hydrogenated at a temperature of about 0.degree. to 250.degree. C., followed by separation of the commercially valuable ammonia and amines. Alternatively, a gas phase reaction may be used.

Abstract: This invention is directed to metallic alloy consisting essentially of iron, boron and silicon and having a composition in the region A, B, C, D, E, F, A of FIG. 1, said alloy having a crystallization temperature of at least about 490.degree. C., a saturation magnetization value of at least about 174 emu/g at 25.degree. C., a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at about 380.degree. C. for a time ranging from about 1000 to about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 380.degree. C.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives.