Abstract: A complex of polyphenylene ether resin and methylene chloride obtained by polymerizing a phenol in methylene chloride and then cooling the mixture to cause the complex to precipitate, is mixed with a vinyl aromatic compound, e.g., styrene monomer, heated to decompose the complex and remove methylene chloride from the blend, and thereafter the vinyl aromatic compound is polymerized. The products are useful as molding resins and the like.

Abstract: This invention is for a process for the ortho-alkalation of phenols in the presence of a magnesium oxide alkylation catalyst. The process comprises the vapor phase reaction of a non-ortho-substituted phenol with an alcohol in the presence of an alkylation catalyst and is characterized by the introduction of water vapor into the reaction system. The water vapor effects continuous regeneration thereby substantially increasing catalyst life before regeneration is required. This is an important advantage as it increases the period of reactor operation before shut down is required, thereby making the overall process more economical.

Abstract: A novel process is disclosed for the polymerization of phenols, e.g., xylenols, and recovery of polyphenylene ethers from the polymerization mixture. The method is based on the use of hot methylene chloride as a reaction solvent, elevated oxygen pressure and separation of the polyphenylene ether as a solid complex with methylene chloride upon cooling. Also a feature is the recycle and recovery of methylene chloride.

Abstract: A cubic boron nitride, diamond or similar grinding wheel is dressed by applying a dressing slurry comprising a multiplicity of inorganic crystals dispersed in a normally fluid carrier medium against the rotating wheel to form a layer of dressing slurry on the surface of the wheel and then pinching the slurry between the wheel and a metal piece until dressing is substantially complete.

Abstract: The melt elasticity of high molecular weight linear polyesters is enhanced by adding a minor proportion of an organic polyepoxide, and heating the resulting mixture. The products of the process are suitable for injection or extrusion blow molding and blown film extrusion.

Abstract: Wire drawing dies having improved life, relatively lower drawing force requirements and producing smooth surface on wires drawn therethrough comprise compacts of polycrystalline diamond, polycrystalline cubic boron nitride and mixtures thereof, which include a centrally-located double tapered hole having micro-rough walls, the micro-rough walls being densely packed with a lubricant for wire drawing.

Abstract: 1.

Abstract: Gamma-Butyrolactone is produced by passing vaporized maleic acid/anhydride or succinic acid/anhydride or mixtures thereof, water, and hydrogen, over a metallic catalyst capable of hydrogenolyzing a carboxylic group to a methyleneoxy group. Even though water is also a byproduct of the reaction, very high yields of gamma-butyrolactone are obtained, and the added water plays a key role in extending catalyst life by suppressing the formation of coke and tar.

Abstract: The surface finishes of workpieces ground with cubic boron nitride, diamond or similar grinding wheels is improved by applying a lapping composition comprising a multiplicity of fine grit abrasive particles dispersed in a normally solid but friction-meltable organic polymeric matrix against the rotating wheel, during spark out, and causing the lapping composition to melt and form a layer on the surface of the wheel and applying the lapping layer against the workpiece until the desired surface finish is achieved.

Abstract: A displacement transducer is manually applied to the cutting surface of a diamond wheel to measure the fixed reference distance and thus degree of wheel wear. The output of the transducer is amplified and directed to visual or print out devices, and archival systems. The transducer signal may be transmitted to provide central processing of field measurements.

Abstract: There are provided compositions comprising a polyphenylene ether and an acrylic resin in combination with a diene rubber-containing resin, the compositions optionally containing a styrene resin. Illustratively, the addition of an acrylic resin modified butadiene rubber-acrylonitrile-styrene resin to polyphenylene ethers or mixtures of polyphenylene ethers and polystyrenes provides unexpected improvements in toughness in parts molded from the compositions, and in their resistance to gasoline. Such properties are improved without substantially impairing gloss or surface appearance.

Abstract: A plurality of selectively permeable membrane cells are mounted in parallel spaced-apart relationship to form a stack. Each cell includes a substrate and selectively permeable membranes positioned on the major surfaces thereof. The substrates are provided with flow ports at alternate end portions to provide a series flow path through the stack which is sealed by peripheral gasket members and end plates. The stack is adapted for use in pressure and vacuum gas enricher systems.

Abstract: Diorganopolysiloxane oils having a viscosity from 50 to 100,000 centipoise at 25.degree.C., where at least one of the organo substituent groups on the silicon atoms is an aliphatic radical of three or more carbon atoms are produced by reacting a cyclic tetrasiloxane or a mixture of cyclic tetrasiloxanes at a temperature in the range of 0.degree. to 90.degree.C. and in the presence of 5 to 300 parts per million of a catalyst selected from cesium hydroxide, silanolates thereof, or a compound of the formula, ##EQU1## wherein R.sup.2 is alkyl of 1 to 8 carbon atoms, cycloalkyl of 4 to 8 carbon atoms and phenyl, B is nitrogen or phosphorous, R.sup. 3 is alkyl of 1 to 8 carbon atoms, cycloalkyl of 4 to 8 carbon atoms, phenyl, siloxane chains of the unit formula R.sub.a.sup.4 SiO.sub.4.sub.-a/2 and mixtures thereof, wherein R.sup.4 is monovalent hydrocarbon or halogenated monovalent hydrocarbon, and a is from 1.5 to 2.5.

Abstract: A mobile, personal oxygen enricher includes means for producing a flow of atmospheric air, heating the air to a pre-selected temperature, and directing the air over an array of selectively permeable membrane cells which permit the permeation of oxygen at a greater rate than nitrogen. Vacuum means maintain the cells at a partial vacuum and draw off oxygen enriched gas. The enriched gas passes through a scrubber to remove pollutants and is directed to a patient for inhalation.

Abstract: Stable catalyst compositions providing faster cure time in room temperature vulcanizing organopolysiloxane compositions containing them comprise stannous salts of branched chain alkyl carboxylic acids having from 8 to 12 carbon atoms and, as a stabilizing carrier therefor, a methyl alkyl polysiloxane fluid having hydroxy aryl substituents. The catalyst compositions are uniquely adapted to provide injectable compositions curable to low density, high compressive strength syntactic foams, useful, e.g., for custom fitting footwear to the wearer.

Abstract: Stable catalyst compositions providing faster cure time in room temperature vulcanizing organopolysiloxane compositions containing them comprise stannous salts of branched chain alkyl carboxylic acids having from eight to 12 carbon atoms and, as a stabilizing carrier therefor, a methyl alkyl polysiloxane fluid having hydroxy aryl substituents. The catalyst compositions are uniquely adapted to provide injectable compositions curable to low density, high compressive strength syntactic foams, useful, e.g., for custom fitting footwear to the wearer.

Abstract: Membrane permeation processes to produce oxygen-enriched gas from atmospheric air are improved by feeding the air to membrane cells divided into two groups, independently withdrawing the permeate output from the two groups of cells into two conduits containing restrictions, and referencing the pressure of one output against the other. A subsequent imbalance of pressure between the two permeate outputs indicates a membrane leakage in one of the two groups of cells.

Abstract: A conductor or casing for shafts and cables, comprising a plastic tubular member having over a portion of its length a plurality of convolutions to permit bending and longitudinal compression and extension without substantial reduction in the internal diameter.

Abstract: Membrane permeation processes to produce oxygen-enriched gas from atmospheric air are improved by initially contacting an ambient air feed with triethanolamine to substantially reduce the nitrogen dioxide content in the air and thereafter feeding the nitrogen dioxide depleted air to an array of membrane cells and finally withdrawing the oxygen-enriched permeate output therefrom, substantially free of nitrogen dioxide, for further use.