Abstract: Liquid 1,1-dichloro-1-fluoroethane containing contaminating unsaturated carbon compounds is treated with chlorine and ultraviolet light to convert the unsaturated contaminants to photochlorination products. The photochlorination products are thereafter separated from 1,1-dichloro-1-fluoroethane, such as by distillation. The process is particularly useful in separating vinylidene chloride from 1,1-dichloro-1-fluoroethane.

Abstract: Heterogeneous copolymers of vinylidene fluoride and chlorotrifluoroethylene are obtained by copolymerization in suspension or emulsion in two stages. In a first stage the vinylidene fluoride and the chlorotrifluoroethylene are copolymerized, and in a second stage the polymerization of vinvylidene fluoride is continued after discontinuance of the introduction of chlorotrifluoroethylene.

Abstract: A vinylidene fluoride-based polymer-containing coating composition provides coatings having weather resistance, chemical stability, surface lubricity, and enhanced adhesion to substrates. The composition comprises:(a) a vinylidene fluoride-based polymer;(b) an acrylic polymer containing hydrolyzable silyl groups and isocyanate groups; and(c) at least one organic solvent.

Abstract: A copolymer of vinylidene fluoride and trifluoroethylene having piezoelectric properties useful at elevated temperatures. The total molar content of trifluoroethylene is less than 30% characterized in that it has a heterogeneous structure with a distribution of accumulated molar composition comprised between two straight lines:Y=-3.18 X +140 andY=-3.12 X +109X is the molar percentage of trifluoroethylene in the macromolecular chains and Y is the percentage by weight of the total of macromolecular chains in which the content of trifluoroethylene is above or equal to X.

Abstract: An extruded thermoplastic polymer conduit having a conduit wall of substantially uniform crystalline morphology through the entire thickness thereof free of any oriented surface zone and the process of making such conduits.

Abstract: A process for the removal of water from a lower alkanesulfonic acid-water mixture by causing the mixture to run down the internal walls of two vertical evaporator columns operated in series, is disclosed herein.

Abstract: A process is provided for producing thermoplastic resins reinforced with long fibers in which rovings are impregnated with a wetting thermoplastic polymer by means of a die and a baffle zone, then taking up the impregnated rovings in a second die where they are then covered with a thermoplastic polymer.

Abstract: A process for the manufacture of amines by reacting at an elevated temperature an olefin selected from a monoolefin, the alcohol corresponding to its hydration, or a mixture of the monoolefin and the alcohol with ammonia or a primary or secondary amine in the presence of a catalyst and a solvent, said catalyst being ammonium sulfate of a double sulfate of ammonium and a transition metal.

Abstract: Flameproofed compositions of matter include an organic synthetic resin and, as a flame retardant therefor, an effective flameproofing amount of specified nitrogenous/halometallic compounds, certain of which are per se novel.

Abstract: An ultrasonic nozzle includes an atomizing surface for producing an atomized liquid spray; a liquid-feed passageway for supplying the process liquid to the atomizing surface, the passageway having a first diameter section and a second fluidly connected smaller diameter section, with a shoulder defined therebetween; an internal shut-off assembly for preventing the supply of process liquid to the atomizing surface, the shut-off assembly including a shut-off rod slidably positioned within the passageway and having a sealing end adapted to cooperate with the shoulder to prevent the supply of process liquid to the atomizing surface, an actuator piston connected with the opposite end of the shut-off rod and slidable within a cylinder bore that is in fluid communication with the passageway, and a valve actuator for slidably moving the piston and shut-off rod in the passageway between a first closed position in which the supply of liquid to the atomizing surface is prevented and a second open position in which the su

Abstract: A coating applicator is provided for depositing a film on a surface of glass and other substrates by chemical vapor deposition. The applicator includes a pair of opposing coating nozzles for applying a vaporized coating chemical reactant in a carrier gas to the surface at such a concentration and velocity that coating of the surface is achieved under substantially reaction rate controlled conditions. Each coating nozzle is positioned adjacent the surface with a small clearance therebetween which is open to the outside atmosphere. The opposing coating nozzles are directed toward each other at a selected angle with respect to a normal to the surface of the substrate. The angle and the clearance provides a condition where there is substantially no intermixing of coating vapors with the outside atmosphere.

Abstract: Novel chromium plating baths suitable for electrodepositing chromium layers which are bright, adherent, smooth and hard, and are capable of being formed at both high and low current densities, and at high cathodic current efficiencies, consist essentially of chromic acid and sulfoacetic acid in a concentration range of about 40 to 150 g/l., and selenate or tellurate ion. Sulfate ion, if present, is included in low concentrations such that the Cr/SO.sub.4 ratio is high, preferably 300:1 or more.

Abstract: Aryl substituted morpholinyl silanes, their preparation, compositions containing said compounds and their use as agricultural fungicides are disclosed.

Abstract: In the process for the manufacture of a polyamide composite material reinforced with long fibers, the improvement comprising impregnating the fibers with a polyamide oligomer or prepolymer, heat-treating the impregnated fiber to increase the length of the polymer chain, and then shaping the impregnated fiber by pultrusion.

Abstract: A polyamide powder consisting essentially of elementary porous particles having a "gypsum rose" structure and a process for preparing a polyamide powder comprising polymerizing by anionic polymerization lactam in a solvent medium in the presence of a catalyst, an activator, and at least one amide; one of which is N,N'-alkylene bisamide; said polymerization being initiated with said lactam and said amide used in an amount such that the solvent is in the supersaturated state at the polymerization initiation temperature.

Abstract: Pipes and couplings for manufacturing pipelines comprising a wall having at least one layer of core material consisting essentially of a crosslinked polyolefin resin and at least one layer of surface material consisting essentially of a thermoplastic resin, said core material being crosslinked to a rate higher than 30%.

Abstract: A process for obtaining essentially cone-shaped aluminum chloride granules free of fines from a gas current containing aluminum chloride, comprising contacting said gas current with a surface whose temperature is below about 70.degree. C. to deposit the aluminum chloride thereon in the form of cone-shaped granules and then heating said surface for a time and at a temperature sufficient to detach said granules from said surface; and the essentially cone-shaped product of such process.

Abstract: A vertical autoclave for carrying out operations involving a medium having a liquid phase and/or a solid phase, comprising:(a) a concave autoclave bottom;(b) a shaft along a vertical axis of said autoclave, said shaft passing through said bottom of said autoclave; and(c) stirrer means for driving said medium with a centripetal motion about said concave autoclave bottom.

Abstract: The invention relates to fluorinated acrylic monomers of the formula: ##STR1## in which A and W denote divalent linkages, R is a hydrogen atom or a methyl radical, R.sub.F is a perfluoroalkyl radical and Q denotes an oxygen or sulphur atom or the group --NR'--, where R' denotes a hydrogen atom or an alkyl radical. Homo-or copolymers derived from these monomers are useful for the water or oil-repellent treatment of various substrates, particularly leather.

Abstract: A tube extends through a wall of a vessel and is adapted to carry an ultraviolet emitter for use with a photochemical reaction vessel. An end of the tube disposed outside of the vessel is mounted within a support which forms a ball joint for that end of the tube. That joint allows the tube to pivot slightly in response to forces acting on the portion of the tube disposed within the vessel, thereby resisting any breaking or bending of the tube which might otherwise occur. A lip seal is disposed around the tube at a location intermediate the ball joint and the vessel to prevent the escape of fluids from the vessel past the tube.