Abstract: Process of preparing light monoolefins by:(a) activating a hydrogen-exchanged aluminosilicate catalyst having a silica to alumina ratio of less than 12 and, optionally, containing added metal cations, by treating with steam at a temperature of at least 400.degree. C., preferably 450.degree. to 520.degree. C.;(b) contacting the steam-activated catalyst in a reaction zone, at a temperature of about 350.degree. to about 600.degree. C., preferably 450.degree. to 520.degree. C., with a gas stream consisting essentially of dimethyl ether or a mixture of methanol and dimethyl ether, as reactant, and sufficient water such that the mole ratio of water to ether in the reaction zone is at least 0.3; at a pressure of about 0.2 to about 30 atmospheres (about 20 to about 3000 kPa), preferably atmospheric pressure (100 kPa), and at a weight hourly space velocity (WHSV) of greater than about 0.5 h.sup.-1, preferably 1 to 150 h.sup.

Abstract: Aqueous dispersions of fluorocarbon polymers in combination with the water-borne reaction product of (a) carboxyl-functional polymers, (b) polyepoxides and (c) tertiary amines are provided. Such dispersions can be applied to a variety of substrates by either conventional coating techniques or electrodeposition, and provide coatings that exhibit excellent release properties and high lubricity.

Abstract: The subject invention is a foamable composition based on a blend of a carbon monoxide- or sulfur dioxide-containing ethylene copolymer and a vinyl or vinylidene halide polymer, and the closed-cell foamed article produced therefrom.

Abstract: An apparatus to recover and restring a broken threadline in a processing multiple running threadlines includes a waste suction device to collect the broken threadline, an interlacing jet to splice the broken threadline onto a running threadline, a forwarding jet to maintain tension on the broken end, a coanda surface at the exit end of the forwarding jet to deflect the broken end into the suction device. While the broken end travels over a notched swing pin to the waste suction device the swing pin is moved to contact the running end which is pulling the broken end spliced to it forward. The action of the swing pin and a pin or cutter blade at the exit of the forwarding jet serves to sever the filaments of the tensioned broken-end threadline which results in a double end running to a sucker gun at the windup. The ends are then separated, placed in the proper guides and restrung.

Abstract: Ink formulation based on polyvinyl butyral and useful for printing polyvinyl butyral sheeting provides both improved blocking and improved glass adhesion through increased hydroxyl content in the polyvinyl butyral of the ink formulation.

Abstract: Ionic copolymers of styrene sulfonic acid and maleic acid improve covering power when added to the gelatin binder employed in medical silver halide X-ray emulsions.

Abstract: This invention relates to a slow start control network which includes a field effect transistor triggered by the voltage across a charging capacitor. The field effect transistor permits current flow through a portion of an associated centrifuge drive motor control arrangement. A supplemental charging current source is provided to assist the charging of the capacitor to the triggering signal level within a predetermined short delay time.

Abstract: Presence of cuprous iodide or cuprous chloride provides protection to ethylene/tetrafluoroethylene polymers against thermal degradation.

Abstract: Presence and location of infrared radiation-absorbing or emitting gases in the atmosphere can be ascertained by means of an infrared imaging-analyzing means which views a given scene and receives infrared radiation therefrom. Analytic and reference beams are produced, the latter having reduced sensitivity to the gas of interest, and are converted to electric signals, which are processed in real time to provide a signal corresponding to their ratio. This ratio signal is further processed to generate an image, which can be displayed and viewed. This technique is particularly suitable for surveying large areas for seepage of methane or other hydrocarbon gases from underground gas and/or oil deposits.

Abstract: Amphoteric N-type betaines represented by the formula: ##STR1## wherein R.sub.1 is C.sub.4 -C.sub.20 perfluoroalkyl;R.sup.1 and R.sup.2 are methyl or, together with the N atom to which they are bonded, form a piperidino, morpholino, or N-alkyl (C.sub.1 -C.sub.4)piperazino group; and m is a whole number between 1 and 4 are highly effective in reducing the surface tension of water and of aqueous solutions of inorganic electrolytes, and can be used in environments where non-amphoteric surfactants would fail, e.g. highly acidic oil well applications.

Abstract: The weight of milk produced by dairy cattle can be increased by supplementing the diets of the cattle with .gamma.-methylmercapto-.alpha.-hydroxybutyric acid and its oligomers.

Abstract: An Al-Mg alloy is mixed with a Ni-Sb alloy or Al, in powder form, to form a thick-film metallizing paste useful for making low resistance electrically conductive contacts to a silicon solar cell coated with Si.sub.3 N.sub.4.

Abstract: Polymers of vinyl oxazoline drying oil ester which esters are made by a process which reacts drying oil fatty acids with tris(hydroxy methyl) amino methane to form an intermediate which intermediate is further reacted at about 175.degree.-195.degree. C. with a formaldehyde/alcohol solution to form the vinyl oxazoline drying oil ester; the improvement used with this process is the use of at least 3 moles of formaldehyde to one mole of intermediate and about 1-5% by weight, based on the weight of the intermediate, of methanol and adding after the reaction with formaldehyde about 5-25% by weight, based on the weight of the ester solution, of an alcohol, a ketone or a mixture of an alcohol and a ketone; coating compositions of these polymers are also disclosed.

Abstract: A coating composition of polymers of a vinyl oxazoline drying oil ester which esters are made by a process which reacts drying oil fatty acids with tris (hydroxy methyl) amino methane to form an intermediate which is further reacted at about 175.degree.-190.degree. C. with a formaldehyde/alcohol solution to form the vinyl oxazoline drying oil ester; the improvement used with this process is the use of at least 3 moles of formaldehyde to one mole of intermediate and about 1-5% by weight, based on the weight of the intermediate, of methanol and adding after the reaction with formaldehyde about 5-25% by weight, based on the weight of the ester solution, of an alcohol, a ketone or a mixture of an alcohol and a ketone; the coating composition are aqueous and contain sufficient ammonia or amine to provide a pH of about 7.5-9.5.

Abstract: The production of an electrolytic alkali-metal cell can be temporarily curtailed by adding sodium-, calcium- or barium sulfate to the cell and reducing the current flow.

Abstract: Substituted and unsubstituted 1,4-dihydroxybenzenes are reacted in the presence of a cation exchange resin catalyst and an inert solvent to form the corresponding 4,4'-dihydroxydiphenyl ethers.

Abstract: A surface delay device which exhibits good precision in delay timing when it is ignited from the side output of a low-energy detonating cord (LEDC) trunkline and end-initiates an LEDC trunkline or downline has a percussion-sensitive ignition charge wedged between the integrally closed end of a metal shell and the end of a delay capsule, which houses the delay and priming charges. An orifice in the end of the delay capsule between the ignition and delay charges is kept free of the ignition charge, e.g., by providing an axial recess in the end of the shell extending at least as far as the orifice. In the field the end of a cord is fitted into a well which is seated in the main detonating charge, adapted to be initiated by the priming charge; and another cord is positioned transversely against the ignition end of the shell.

Abstract: A method for measuring continuously shrinkage and crimp development in a long continuous sample of yarn involves the steps providing a zero-tension loop, applying a standard tension, then developing crimp in a single downward pass through a hot air chamber providing a second zero-tension loop and thereafter retensioning it. The shrinkage and crimp development is calculated from differential speeds of rolls advancing the yarn.

Abstract: An improved rock-bolt grouting composition based on a cross-linkable unsaturated polymerizable polyester resin formulation in one component and a peroxide catalyst in a separate component, contains diffused water, preferably in the catalyst component, in an amount sufficient to provide a weight ratio of resin formulation to water no greater than about 6.0, and a particulate solid filler in both components in an amount sufficient to provide a weight ratio of filler to resin formulation of at least about 3.0. The filled, water-extended composition generally expands during the cross-linking of the polymer, and greater interfacial strength in smooth-walled boreholes has been found. Compositions in which water is the catalyst vehicle are preferred because their shelf life is better than those containing an oil-based catalyst.

Abstract: A process for purifying an aqueous solution of NaOH by removing suspended NaCl and Na.sub.2 SO.sub.4 impurities therefrom comprising bubbling a gas into the impurity-containing NaOH solution at a temperature above 16.degree. C. and up to about 36.degree. C.