Abstract: Disclosed is a method for the preparation of 3-aminoacrylic acid esters by the addition of a beta-hydroxyacrylic acid esters to an aqueous solution of an amine salt.

Abstract: A propellant charge igniter for ammunition including an ignition-conducting housing accommodating an electrical ignition system and an initiating charge therein, the housing being formed of an exothermally burning material.

Abstract: Disclosed is a casting resin of reduced viscosity based on methacrylic acid esters with a high content of aluminum hydroxide as filler containing a mixture of at least one organosilicon compound with a functional group, at least one silicic acid ester, and at least one organic metallic acid compound of metals of Groups IVB and/or VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or by alkylene groups. The casting resins of the invention have improved working qualities. Plastic objects and moldings manufactured from these resins have decidedly improved use properties.

Abstract: Disclosed is a process for the production of ketoximosilanes and ketoximoalkoxysilanes. Ketoximes are reacted with alkyl trialkoxysilanes in the presence of a catalyst. The reaction is catalyzed by basic compounds which are dissolved or suspended in the ketoxime. The basic compounds that are used are alkali metals and, preferably, the oxides, hydroxides and carbonates of the elements from the 1st and 2nd group and the 3rd sub-group of the Periodic Table of Elements and lanthanides. The process according to the invention prevents the decomposition and explosion that easily occur in the known processes. The ketoximosilanes prepared according to the invention are valuable crosslinking agents for organopolysiloxane compositions.

Abstract: Disclosed is a method for the preparation of 2,6-naphthalene dicarboxylic acid from 2-acyl-6-alkyl naphthalene, especially 2-acetyl-6-methylnaphthalene, by oxidation in two steps with oxygen or air. The catalyst in the first oxidation is based on manganese. The catalyst in the second oxidation is based on cobalt with bromine added. The addition of 6-alkyl-2-naphthoic acid to the reaction in the second oxidation, in portions or in a continuous manner, results in very good yields having high purities.

Abstract: A soil injection agent on an alkali metal silicate basis, containing as gelling agent trialkoxysilanes of the formula R-Si(OR').sub.3, in which R is an aliphatic moiety of 1 to 6 carbon atoms and R' represents equal or different alkyl moieties of 1 to 4 carbon atoms, is adjusted for properties by the addition of acid alkali metal phosphates or ammonium phosphates and/or phosphoric acid. The addition improves the sealing and strengthening action of the gels and permits a reduction of the silane content, without impairing the resistance of the gels to pollutants.

Abstract: A multistage arrangement for countercurrent separation of suspended solids, such as crystals, by means of hydro-cyclone groups connected in series and corresponding pumps and pump wells. For operating with relatively small expenditures with respect to apparatus under high pressures and at high temperatures within a certain, limited temperature range, the hydro-cyclone groups, the pump wells with pumps projecting into the pump wells, and the essential parts or regions of the lines are placed in a common pressure-proof and heat-insulated chamber. In addition, for removing coarser crystallizations and solid particles, an upstream classifier also accommodated in the chamber may be provided. The multistage arrangement can be used in a process for the production of terephthalic acid from dimethyl-terephthalate as the intermediate product, and in a process for the hydrogenation of coal.

Abstract: A safe production of sodium nitro-1,3-propanediol from a reaction solution of nitromethane and paraformaldehyde in methanol by addition of sodium methylate is achieved by evaporative cooling of the methanol; it being possible to maintain reaction temperatures of 35.degree. C. to 50.degree. C.

Abstract: A firing mechanism with safety device for firearms, especially sport and hunting rifles and shotguns, with at least one barrel and a firing pin associated therewith and operable by way of a striker member in that the member is movable into an uncocked position, under the influence of the force of a compressed spring, against the firing pin after a trigger lever locking the striker member in a cocked position has been placed into a release position, and with at least one trigger with an associated rocker arm. In order to secure the firearm against unintended firing of shots due to external impact effects, the striker member is fashioned as a slide and is displaceable in the longitudinal direction from a rearward cocked position into a forward uncocked position.

Abstract: A process is disclosed for the continuous embossing of the surface of flexible (i.e., soft-elastic) sheets or lengths of foam material optionally laminated to a synthetic resin film or a flat textile form or facing wherein the sheet of foam material is superficially plasticized by heating and is exposed to an embossing pressure by means of a perforated metallic embossing belt or band in accordance with a desired embossing pattern. The belt is removed after cooling and solidification of the embossed surface of the sheet of foam material.

Abstract: Disclosed is a thermosetting adhesive and sealant composition of:20 to 60 wt. % of carboxyl-group-terminated polyesters with preferably at least two carboxyl groups per molecule, with a glass transition temperature below 20.degree. C.,2 to 12 wt. % of polyoxazolines which contain at least two oxazoline groups per molecule,2 to 40 wt. % of acrylic or methacrylic esters, preferably of polyvalent alcohols, and/or allyl esters of polyvalent carboxylic acids,which can contain preferably peroxides or aliphatic azo compounds as radical formers and, if desired, paraffin and reactive or nonreactive diluents and additives.

Abstract: Disclosed is a process for the cleavage of chlorosiloxanes in the gas phase at temperatures between 350 and 1450.degree. C. to form chlorosilanes and silicon dioxide as reaction products. The claimed process is preferably performed in the presence of metallic silicon or ferrosilicon. The procedure can be combined with the large-scale technical production of chlorosilanes by the chlorination or hydrochlorination of silicon. The inventive process makes it possible to perform the chlorination or hydrochlorination of silicon with the formation of chlorosilanes in an increased yield while reducing the formation of by-products.

Abstract: Articulated connection between the break-open action and the at least one barrel of a rifle with two coaxial pairs of articulation members, the two articulation members (1a and 2a) of each pair complementing each other, and respectively one articulation member being provided at the break-open action (1) and, respectively, at the corresponding sidewall of the barrel (20). These articulation members (1a and 2a) exhibit a coupling profile (P1 and P2, respectively) ensuring a shape-mating connection between the break-open action (1) and the barrel (20) also transversely to the firing direction, this coupling profile permitting utilization of the axial pressure (S) produced during firing for generating a component force that is perpendicular to the aforementioned axial pressure (S) and counteracts the spreading apart of the sidewalls (1b) of the break-open action (1).

Abstract: The casings are guided through a supply duct to a sorting roller which possesses an arresting duct with a pin extending axially and, in the same cross-sectional plane, a transit duct. Those casings which arrive with the casing base directed upwardly penetrate into the arresting duct, with the case base resting on the free end of the pin. On subsequent rotation of the sorting roller through 180.degree., the casing falls into the outlet duct with base directed downwardly. Casings, which arrive with base pointing downwardly, run up against the pin and rest on the periphery of the roller until, after 180.degree. rotation of the transit duct, they align with the supply duct and can fall unhindered into the outlet duct. All casings fall into the outlet duct with their base directed downwardly.

Abstract: The present invention relates to the production of molds for the casting of metal. The molds are made of refractory materials bound together by a binding agent on the basis of a partially hydrolyzed, partially condensed silicic acid ester. A slip consisting of binding agent and refractory material is applied to the model alternately with a granular refractory sanding material. In accordance with the invention, the granular refractory sanding material contains the agent for hardening the binding agent. The method of the invention makes possible the dimensionally accurate reproduction of even relatively large models, while the slip can be stored over a relatively long period of time without loss of its action.

Abstract: Solvent-free alkyl trialkoxy-silanes whose alkyl groups have 2 to 8 carbon atoms and whose alkoxy groups have 1 or 2 carbon atoms are used for the in-depth hydrophobic impregnation of concrete. Propyl and isobutyl trialkoxy-silanes display an especially deeply penetrating hydrophobizing action which is greater than that of solutions of these silanes.

Abstract: The invention relates to solutions of silanols prepared by hydrolysis of alkyltrialkoxysilanes whose alkoxy groups are partially or completely hydrolyzed.Preferred hydrolyzed alkyltrialkoxysilanes are of the formula CH.sub.3 --CH.sub.2 .dbd.CH.sub.2 --Si(OH).sub.n (OH').sub.3-n.

Abstract: A multistage arrangement for countercurrent separation of suspended solids, such as crystals, by means of hydro-cyclone groups connected in series and corresponding pumps and pump wells. For operating with relatively small expenditures with respect to apparatus under high pressures and at high temperatures within a certain, limited temperature range, the hydro-cyclone groups, the pump wells with pumps projecting into the pump wells, and the essential parts or regions of the lines are placed in a common pressure-proof and heat-insulated chamber. In addition, for removing coarser crystallizations and solid particles, an upstream classifier also accommodated in the chamber may be provided. The multistage arrangement can be used in a process for the production of terephthalic acid from dimethyl-terephthalate as the intermediate product, and in a process for the hydrogenation of coal.

Abstract: A motor vehicle door including a supportive and dimensionally stable skeleton which, together with an inner shell, constitutes a one-piece door body, to which an outer shell is attached as a separate element. The inner shell and the outer shell are fashioned from a synthetic resin and the supportive skeleton connects hinge members with the door lock of the door. The inner skin is provided with at least one of troughs or depressions and mounting bores or apertures.

Abstract: From reaction solutions of carboxylic acids prepared by carbonylation with the aid of cobalt carbonyl catalysts, the cobalt of the catalyst is precipitated by the addition of at least equivalent amounts of monocarboxylic or dicarboxylic acids and neutralization with alkaline agents, in the form of a cobalt(II) salt of the added acid, and the carboxylic acid is completely recovered from the reaction solution by acidification.