Abstract: The present invention relates to a new process for the production of elastomeric polyurethane moldings which may be microcellular having a sealed surface layer and an average density of from 0.8 to 1.4 g/cm.sup.3, wherein specific condensation products of ricinoleic acid are used as internal mold release agents.

Abstract: Thermotropic wholly aromatic polyesters containing condensed residues of p-hydroxybenzoic acid, isophthalic and optionally terephthalic acid, hydroquinone and 3.4'- and/or 4.4'-dihydroxy diphenyl, -diphenyl ether and/or -diphenyl sulphide, have excellent mechanical properties and are nevertheless not difficult to process.

Abstract: Thermotropic fully-aromatic polyesters which contain sulphonic acid and/or metal sulphonate groups bound to the aromatic rings of the polyester, have improved mechanical properties.

Abstract: A cassette for X-ray film has a cover and a bottom which can be moved apart to open the cassette and insert a sheet of X-ray film and can be moved together to close the cassette and define a light-tight compartment for the film. A magnetic foil is secured to the bottom of the cassette and an intensifying screen overlies the magnetic foil. The cover carries a resilient border which, in turn, carries a synthetic resin foil. A magnetic sheet is secured to the synthetic resin foil and a second synthetic resin foil is secured to the side of the magnetic sheet remote from the first synthetic resin foil. A second intensifying screen is attached to the second synthetic resin foil. When a sheet of film is accommodated in the cassette and the latter is closed, the intensifying screens are located on opposite sides of the film. The magnetic sheet and magnetic foil are attracted to one another thereby urging the intensifying screens into uniform contact with the film.

Abstract: A device and method for the insertion of commercial grade separators into the mold of a continuous steel caster. The present invention discloses a device made from standard steel channel and a method for the use thereof to mechanically insert grade separators.

Abstract: Aromatic polyesters based on diphenols, iso- and terephthalic acid, which contain terminal or lateral radicals with two conjugated double bonds, show greatly improved resistance to stress corrosion after tempering.

Abstract: Thermotropic, wholly-aromatic polyester carbonates which contain condensed radicals of 4,4'-dihydroxydiphenyl have a reduced viscosity in the melt, without the mechanical properties of the product suffering therefrom.

Abstract: A process for the production of 2-aryl-4-acyl-1.3.4-oxdiazolones-(5), in which an aromatic carboxylic acid hydrazide is reacted at a pH value of from 1.8 to 3.0 with phosgene in a mixture consisting of water and acetone at a temperature of from 0.degree. C. to 50.degree. C., subsequently the pH is increased to from 9.5 to 11.0, then about 100 mol % of a carboxylic acid chloride or about 50 mol % of a dicarboxylic acid chloride (based on mols of carboxylic acid hydrazide) is added and optionally from 10.sup.-4 to 1.0 mol % (based on mols of carboxylic acid hydrazide) of a tertiary amine or phosphine is added as a catalyst and the reaction is completed at a temperature from 0.degree. C. to 50.degree. C.

Abstract: Thermotropic fully aromatic polyesters which contain radicals of p-hydroxybenzoic acid, iso- and/or terephthalic acid and 2,7-dihydroxynaphthalene condensed therein, having outstanding mechanical properties and accordingly are very easy to process.

Abstract: A windshield for motor vehicles equipped with a windshield wiper system, which, for the improvement of the wiped field, includes in its lower area strip-shaped profile members whose side facing the bottom edge of the windshield form together with the windshield surface a water-collecting channel open in the downward direction. In order to prevent the rising of water from non-wiped areas in the lower part of the windshield onto wiped higher areas, provision is made according to the invention that the upper edge area of each profile member extends along the lower edge area of the associated wiper field.

Abstract: Thermotropic, wholly aromatic polyesters containing condensed residues of(a) p-hydroxy benzoic acid,(b) 3-chloro-4-hydroxy benzoic acid,(c) isophthalic acid,(d) hydroquinone and(e) 3,4'- and/or 4,4'-dihydroxy-diphenyl, -diphenyl ether and/or -diphenyl sulphidehave high rigidity and toughness and yet are easily processable.

Abstract: Aromatic polyester carbonates may be produced by melt-extruding solutions of aromatic polyesters and aromatic polycarbonates.

Abstract: Certain substituted diphenyl ethers improve the flowability of aromatic polyesters and polyester carbonates in the melt.

Abstract: Thermoplastic polyphosphonatocarbonates prepared by polycondensing at least one aromatic dihydroxy compound with a diaryl carbonate and a phosphonic acid diaryl ester in the presence of a catalyst selected from the group consisting of (a) tetra-C.sub.1 -C.sub.18 -alkyl titanates, (b) di-C.sub.2 -C.sub.4 -alkyl-tin oxides, (c) di-C.sub.2 -C.sub.4 -alkyl-di-C.sub.1 -C.sub.4 -alkoxy-tin compounds, (d) tetra-C.sub.3 -C.sub.18 -alkyl zirconates, (e) tri-C.sub.2 -C.sub.18 -alkyl vanadylates and (f) mixtures of germanium dioxide or titanium dioxide and at least one of (a) to (e) in a weight ratio of 1:3 to 3:1 at a temperature of from 80.degree.-340.degree. C. and under a pressure of 600 to 0.1 mm Hg in an inert gaseous atmosphere, the molar ratio of diaryl carbonate to phosphonic diaryl ester being from 5:95 to 95:5 and the molar ratio of aromatic dihydroxy compound to the sum of diaryl carbonates and phosphonic diaryl ester being from 0.91:1 to 0.99:1.

Abstract: The present invention is directed to derivatives of azoles, their preparation and their use as chemical blowing agents for thermoplastic molding compositions. The agents of the invention are characterized in their improved compatibility with the resin wherein they are incorporated.

Abstract: The subject of the present invention is a process for the preparation of polyphosphonates containing carbonate structures in amounts of 0.3 to 4.5 mol %, relative to the sum of phosphonate and carbonate structural units, which is characterized in that diaryl phosphonates are reacted with diphenols in the presence of neutral transesterification catalysts, and the reaction is then completed by adding diaryl carbonate.

Abstract: The present invention relates to polycarbonate articles and films characterized by their antistatic properties comprising polycarbonate resin and alkali, or alkali earth, salts of specific aromatic sulfonic acids, specific aromatic phosphonic acids or aromatic partial phosphoric acid esters.

Abstract: A separator plate for a type band printer is located between the print paper and a ribbon so as to prevent the ribbon from contacting the paper. The upper edge of the separator plate is located adjacent to the print line and pushes the paper away from the ribbon against the hammer plate. The separator plate is affixed to the printer.

Abstract: In a single circuit refrigeration plant, a refrigerant gas stream while flowing in the circuit is compressed by a compressor, circulated from the pressure side of the compressor through a condenser, then an evaporator and finally back to the suction side of the compressor. A housing is provided having two concentrically located contiguous compartments. Of these, the first compartment is interposed between the pressure side of the compressor and the condenser. The second compartment is interposed between the first compartment and the refrigerant gas return line to the suction side of the compressor. In the first compartment, the compressed refrigerant is degassed and forwarded to the condenser and the separated oil, still having some gas dissolved in it is forwarded under pressure to the second compartment.

Abstract: A dental unit has dental instruments carried by individual nests, the nests being selectively movable from a storage position to a readiness position. Each nest is carried to the readiness position in a controlled manner such that the axis of the instrument becomes horizontal and moves downwardly as the instrument approaches the readiness position.