Abstract: Pharmaceutical composition for long-term oral or parenteral administration and adapted to slowly release the pharmaceutically active substance, comprising a therapeutically-active amount of a pharmaceutically-active substance homogeneously mixed with at least 20% by weight of poly-D(-)-3-hydroxybutyric acid relative to the amount of active substance; a process for preparing such composition in compressed form and a process for the long-term administration of such composition.

Abstract: A process for the preparation of O-[3-phenyl-6-chloro-4-pyridazinyl] S-(alkyl) thiocarbonates by reaction of alkali metal salts of 3-phenyl-4-hydroxy-6-chloropyridazine with alkyl thiochloroformates in a water/acetone solution.

Abstract: An improved process for substantially increasing the shelf-life of aqueous solutions of melamine-formaldehyde resins wherein the molar ratio of melamine to formaldehyde is from 1:1.7 to 1:3.5 by the addition of a stabilizing amount of urea after condensation, which process includes the steps of adjusting pH of the resin solution before and after the dissolution of the urea within certain narrow but easily controllable pH ranges. The properties of the resin solution can be further improved and the stabilizing effect of the addition of urea increased by adding a monohydric C.sub.1 -C.sub.4 alkanol during condensation of the resin.

Abstract: Process for the preparation of monomeric methylolmelamine which is partially etherified with methanol or ethanol and which contains at least 4 moles of formaldehyde per mole of melamine, by reacting melamine, paraformaldehyde and methanol or ethanol in a single stage reaction, the molar ratio of melamine to formaldehyde to alcohol being 1:5 to 10:6 to 20, in a virtually anhydrous medium, under a nitrogen atmosphere, at a pH of 7 to 8 and a temperature from 50.degree. to 90.degree. C. and with a reaction time of from 3 to 30 hours.

Abstract: A filler for paper, card or board which has a good retention and consists of an inert core material and a hydrophilic coating, which consists of polyacrylamide having a molecular weight of 10.sup.5 to 10.sup.7 or of a mixture of this polyacrylamide with a urea-formaldehyde condensation resin. The filler is prepared by suspending the inert core material in an aqueous solution of a polyacrylamide having a molecular weight of 10.sup.5 to 10.sup.7 or in an aqueous solution of such a polyacrylamide and a urea-formaldehyde condensation resin, and drying this suspension by spray drying or in a stream of hot air. This crosslinks the initially water-soluble polymer and forms a coating, adhering to the core, which is insoluble in water but is hydrophilic and swells, and becomes tacky, in the presence of water.

Abstract: Preparation of 1,2,4-triazole by reacting formamide and hydrazine in a molar ratio of 2:1 to 2.2:1, hydrazine or its hydrate being metered into excess formamide, preheated to 160.degree.-200.degree., while maintaining the temperature, and then completing the reaction at 160.degree.-240.degree. C.

Abstract: The present invention relates to the novel compound N-[3-(1'-3"-Oxapentamethyleneamino-ethylideneamino)-2,4,6-triiodobenzoyl]- .beta.-amino-.alpha.methylpropionitrile which due to the sparing solubility in water, can be purified readily in a simple manner and can be used for the preparation of the known active compound for agents for peroral rapid cholecystography N-[3-(1'-3"-oxapentamethyleneamino-ethylideneamino)-2,4,6-triiodobenzoyl]- .beta.-amino-.alpha.-methyl propionic acid.

Abstract: Modified aminoplast resins based on melamine and formaldehyde or urea and formaldehyde, which contain, as modifiers, methylolmelamines having a molar ratio of melamine to formaldehyde of 1:3 to 1:6, which are etherified with mono-alcohols having 1 to 4 carbon atoms, in a ratio of melamine to alcohol of 1:2 to 1:6. These resins are used, in particular, for the production of decorative, glossy-surface laminations.

Abstract: Composition which has a prolonged broncholytic and tocolytic activity and consists of a compound of N,N'-bis-[2-(3',4'-dihydroxyphenyl)-2-hydroxyethyl]-hexamethylenediamine with a polystyrene which is crosslinked with divinylbenzene, contains sulphonic acid radicals as anchor groups and has a degree of crosslinking of 2-5%, and a process for the preparation of this composition by treating the proton form of the resin with an aqueous solution of a bis-salt of the base.

Abstract: Clear aqueous solution capable for intravenous administration comprising 2,4-diamino-5-(3',4',5'-trimethoxybenzyl)-pyrimidine as a sulphonamide potentiator, a water-soluble medicinally-acceptable salt of 3-methoxy-4-(4'-aminobenzol-sulphonamido)-1,2,5-thiadiazole and from about 5 to about 40% by weight of a compound selected from the group consisting of sugar-alcohols having 5 or 6 carbon atoms, glucose and fructose, which solution has a pH-value within the range of 6 to 8.

Abstract: A continuous process for the production of flame-resistant foamed plastics material by condensation of aqueous aminoplast precondensates with diisocyanates or polyisocyanates, wherein, in a first mixing stage, the isocyanate is mixed with 4 to 14% by weight of catalyst, the catalyst being an organic amine and/or an organic metal compound, at temperatures of 40.degree. to 130.degree. C., with a residence time of 1 to 8 seconds, and directly thereafter, in a second mixing stage, the aminoplast precondensate and, simultaneously but separately from the aminoplast, an acid curing catalyst are introduced, after which the foamable mixture thereby produced is discharged continuously.

Abstract: The present invention relates to the novel compound N-[3-(1'-3"-Oxapentamethyleneamino-ethylideneamino)-2,4,6-triiodobenzoyl]- .beta.-amino-.alpha.-methylpropionitrile which due to the sparing solubility in water, can be purified readily in a simple manner and can be used for the preparation of the known active compound for agents for peroral rapid cholecystography N-[3-(1'-3"-oxapentamethyleneamino-ethylideneamino)-2,4,6-triiodobenzoyl]- .beta.-amino-.alpha.-methyl propionic acid.

Abstract: Preparation of a raw mix for use in the production of cement and sulphuric acid by the cement-sulphuric acid process, wherein coke is comminuted to a degree that at most 10% by weight of the coke has a particle size of less than 0.1 mm and at least 90% by weight has a particle size of less than 20 mm, but at least 60% by weight has a particle size greater than 0.2 mm, after which the thus comminuted coke is mixed with a mixture, of fine particle size, comprising calcium sulphate and the remaining additives.

Abstract: Pure cyanuric acid is prepared from crude or waste melamine by introducing the melamine into 70 to 80% strength sulfuric acid at room temperature and heating the reaction mixture to 150.degree. to 190.degree. C., the water introduced with the sulfuric acid being distilled off during the heating period.

Abstract: A thermally-expandable sealant for joints, cavities or holes, which foams in the event of a fire and thereby effects a seal, comprising as a carrier a fleece or fabric made of glass or plastic, which is coated with a composition based upon expandable graphite and containing, per 100 parts by weight of expandable graphite, 10 to 30 parts by weight of polychlorobutadiene, 1 to 40 parts by weight of an alkylphenol/formaldehyde resin and 1 to 3 parts by weight of stabilizers known per se, and optionally, up to 30 parts by weight of inorganic fibers and up to 80 parts by weight of aluminium hydroxide. A process for sealing joints, cavities or holes using the sealant is also disclosed.

Abstract: Additive for inorganic binders, such as cements, calcium sulfate, magnesia cement and the like, which comprises, as the active ingredient, a water-soluble salt of a mixed resin consisting of an aromatic aminosulfonic acid, urea, melamine and formaldehyde, the molar ratio, in the resin, of aromatic aminosulfonic acid to the total amount of melamine and urea being (0.2 to 1.0):1.0 and the molar ratio of melamine to urea being from 0.75:0.25 to 0.30:0.70, and also building materials, having increased flowability and early strength, in which this additive is present.

Abstract: Novel spirocyclic boron compounds of the formula ##STR1## in which R.sub.1 and R.sub.2 are various halogen containing organic :radicals and Z.sup.+ is a hydrogen ion, an equivalent of an alkaline-earth metal ion, a guanidinium ion or alkylammonium ion as flame retarding agents in various plastics, such as polyurethanes, epoxide resins and polyesters.

Abstract: Herbicidal composition which comprises as active ingredients a phenylpyridazine of the formula ##STR1## in which Hal is chlorine or bromine, R is alkyl with up to 12 C-atoms and X and Y are oxygen or sulfur, whereby one of X and Y always is sulfur and 2-{[4-chloro-6-(ethylamino)-S-triazin-2-yl]amino}-2-methylpropionitrile.This composition is particularly used in combating weeds which are difficult to combat and are found in growing cereal crops.

Abstract: Aluminum fluoride with an AlF.sub.3 content of at least 96% by weight relative to the anhydrous product is produced by reacting aluminum hydroxide with aqueous fluosilicic acid, removing the precipitated silica, adding hydrofluoric acid in a quantity of 0.1-1% by weight of HF relative to the so produced AlF.sub.3 containing solution having an AlF.sub.3 content of 20 to 50 percent and atomizing same before the start of crystallization of the aluminum fluoride at temperatures of 110.degree.-350.degree. C. optionally using aluminum fluoride particles as heat transfer agents.

Abstract: An improved process for the preparation of crystalline cryolite having a molar ratio Na:Al of 2.9:1 to 3.0:1, by reacting aqueous solutions of aluminum fluoride with at least a stoichiometric amount of sodium fluoride in aqueous solution, while heating, in the presence of cryolite seed crystals, wherein the sodium fluoride is used in an amount of 3.2 to 3.5 moles of sodium per mole of aluminum, the aluminum fluoride concentration being from 15 to 250 g./l., the sodium fluoride concentration being from 30 to 42 g./l., the reaction temperature being from 85.degree. to 100.degree. C., the reaction time from 0.5 to 3 hours and the pH value in the reaction mixture from 5 to 8, to provide an end product having an adsorbed water content of 8% or less.