Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer which consists of a dispersion of an anisotropic magnetic material in an organic binder which consists essentially of an OH-containing polyurea-urethane binder crosslinked with polyisocyanate. The OH-containing polyurea-urethane is obtained by reacting a polydiol, a diol and a primary or secondary aminoalcohol, and if appropriate a triol, with a diisocyanate.

Abstract: Reaction mixtures which are obtained on hydroformylation or carbonylation of olefinically unsaturated compounds and which contain dissolved non-volatile complex compounds of metals of group VIII of the periodic table are worked up by a method wherein the products, after distillative removal of low-boiling constituents alone, or of these constituents plus a part of the high-boiling residue, or a part of the high-boiling residue after distillative removal of the desired products, are or is extracted with carbon dioxide, a C.sub.2 -C.sub.4 -paraffin, a C.sub.2 -C.sub.4 -olefin or a normally gaseous halohydrocarbon at above the critical temperature and above the critical pressure of these (extractant) compounds.

Abstract: Fluorine-substituted aromatic compounds are obtained by reacting the corresponding nitro compound with a salt of hydrofluoric acid in the presence of an acid halide.

Abstract: Highly electrically conductive copolymers of pyrroles and other heterocyclic compounds having a conjugated .pi.-electron system, which possess good mechanical properties coupled with a well-balanced spectrum of properties, are prepared by anodic polymerization of the pyrroles and other heterocyclic compounds and/or their dimers or oligomers in a polar solvent in the presence of a suitable conductive salt.

Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer consisting of finely divided anisotropic magnetic material which is dispersible in binders and additives, the binder being a mixture of (1) an OH-containing polyurethane which is crosslinked with polyisocyanates, (2) a high molecular weight thermoplastic linear polyurethane and (3) a polyvinylformal binder, a phenoxy resin, a cellulose ester or a vinyl chloride copolymer.

Abstract: Finely divided electrically conductive pyrrole polymers are prepared by a process in which a finely divided pyrrole polymer, obtained by polymerization of pyrroles in solution with an oxygen-containing oxidizing agent, is electrochemically charged in the presence of a conductive salt. The finely divided electrically conductive pyrrole polymers can be used for the production of moldings.

Abstract: This application discloses water-dispersible binders which are based on modified epoxide/amine adducts and are the reaction products ofA. polyepoxides having an epoxide equivalent greater than 1 and a mean molecular weight M.sub.n of 140 to 5,000 withB. diphenylolalkanoate esters andC. amines.

Abstract: Riboflavin of the formula I ##STR1## is prepared by condensing a 4,5-dimethyl-N-(D)-ribityl-2-phenylazoaniline of the formula II ##STR2## where R is H or --Cl, --NO.sub.2 or --CH.sub.3 in the o- or p-position, with barbituric acid of the formula III ##STR3## in the presence of an acid as the condensing agent, by an improved process in which the acidic condensing agent used is an aliphatic or cycloaliphatic/aliphatic tertiary carboxylic acid of the general formula IV ##STR4## where R.sup.1, R.sup.2 and R.sup.3 are each a lower alkyl group, R.sup.1, R.sup.2 and R.sup.3 together containing 3 to 20, preferably 3 to 10, carbon atoms, or R.sup.1 is a lower alkyl group, in particular methyl, and R.sup.2 and R.sup.3 together form a tetramethylene or pentamethylene group.The process can be particularly advantageously carried out using trimethylacetic acid or a commercial mixture of saturated tertiary carboxylic acids, e.g. Versatic .sup.R 10-acid.

Abstract: In preparing or reacting alkanolamines, especially at high temperatures, the use of substantially nickel-free alloy steels prevents corrosion and discoloration.

Abstract: 7-Aminoazolo[1,5-a]pyrimidine of the formula ##STR1## where R.sup.1 is unsubstituted or substituted alkyl, halogen, alkoxy, cyano, or cycloalkyl, or is aryl, aryloxy, arylthio, arylalkyl, arylalkoxy or arylalkylthio, each of which may be substituted, or is indane, tetrahydronaphthalene or benzene, each of which may be substituted and is fused to the phenyl ring, R.sup.2 and R.sup.3 are each hydrogen, alkyl or aryl, n is 1 or 2, A is nitrogen or a CR.sup.4 group, where R.sup.4 has the meanings of R.sup.2 and may furthermore be halogen, cyano or alkoxycarbonyl, or together with R.sup.3 is alkylene which may have up to 2 double bonds, and fungicides containing these compounds.

Abstract: A process for the continuous preparation of rubber-modified polymers of vinyl-aromatics, wherein a mixture which contains a monomeric aromatic vinyl compound and from 3 to 30% by weight, based on the monomer, of an elastomeric polymer, with or without a solvent, is polymerized, in the presence of a free radical initiator and in the presence or absence of a mercaptan as chain transfer agent, at from 80.degree. to 180.degree. C., with stirring, in a cascade of two or more isothermally operated reaction zones and of one or more additional reaction zones which can be operated isothermally or with a rising temperature profile in such a way that the residence time of the reactants in the first reaction zone is .ltoreq.35 minutes. The polymer obtained is freed from vinyl-aromatic monomer, and from any solvent, in a devolatilization zone. The product is useful for the production of injection moldings.

Abstract: Thiophosphates of the formula I ##STR1## where R.sup.1 is hydrogen, or not more than 4 identical or different substituents R.sup.1 may be present, each of which is fluorine, chlorine or bromine, straight-chain or branched alkyl of not more than 5 carbon atoms, alkoxy of not more than 3 carbon atoms or alkylthio of not more than 3 carbon atoms, R.sup.2 is alkoxy, alkylthio or alkylamino, each of which is substituted by straight-chain or branched alkyl of not more than 5 carbon atoms, R.sup.3 is alkyl of not more than 3 carbon atoms and X is oxygen or sulfur, a process for their preparation and their use as pesticides.

Abstract: Branched, high molecular weight, thermoplastic polyarylene ethers which contain nitrile groups and are composed of repeating units of the formula I--E.sub.1 --O--E.sub.2 --O--where E.sub.1 is a radical derived from a dihalobenzene compound and E.sub.2 is a radical derived from a bisphenol, and contain from 0.01 to 5 mol %, based on the radical E.sub.1, of one or more radicals derived from polyhalo compounds of the formulae ##STR1## where X is fluorine or chlorine, and their preparation.

Abstract: In the preparation of ammonium carbamate by reacting ammonia with carbon dioxide, the reactants are introduced into a layer of ammonium carbamate which is kept in the fluidized state by gaseous ammonia or carbon dioxide. The temperature is kept below 25.degree. C. by removing the heat of reaction.

Abstract: Magnetic recording media comprising a non-magnetic base which is provided with a magnetic layer which consists essentially of a dispersion of an anisotropic magnetic material in a mixture of an OH-containing polyurea-urethane binder, which is crosslinked with a polyisocyanate, with a physically drying binder.

Abstract: Finely divided electrically conductive pyrrole polymers are prepared by a process in which the pyrroles, in solution and in the presence of a conductive salt, are treated with an oxygen-containing oxidizing agent. The finely divided conductive pyrrole polymers can be used for the production of moldings.

Abstract: An improved process for the purification of crude riboflavin which has been prepared by condensation of an N-(D)-ribityl-2-arylazo-4,5-dimethylaniline and barbituric acid or another N-(D)-ribityl-4,5-dimethyl-aniline derivative with a barbituric acid derivative, by dissolving the crude riboflavin in sulfuric acid or phosphoric acid which has been diluted with water and oxidizing the impurities by treating the solution with hydrogen peroxide, or by dissolving the riboflavin in dilute nitric acid at elevated temperature and then isolating the pure riboflavin by precipitation with water, wherein the mineral acid solution of the riboflavin and the oxidizing agent or the solution of the riboflavin in 20 to 70% strength by weight nitric acid is heated extremely rapidly to a temperature at which the solution clearly changes color from greenish to yellow-orange, the solution is kept at this temperature for from 1 to 50, seconds and the oxidation reaction is then interrupted by addition of water.

Abstract: A tape cassette is provided with interlocking wall sections to protect it against mechanical and/or thermal deformation. Advantageous interlocking connecting means are stepped teeth, peg-and-hole connections and connections in the form of prism-shaped projections and matching recesses.Such interlocking connecting systems can be used with particular advantage in film, audio, video and data cassettes and all kinds of storage containers which are required to exhibit great flexural strength.

Abstract: Aniline derivatives of the formula ##STR1## where R.sup.1, Y, A, Z and n have the meanings given in the description, are used for controlling undesirable plant growth.

Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer consisting of finely divided anisotropic magnetic material which is dispersible in binders and additives, the binder being a mixture of (1) a high molecular weight thermoplastic linear polyurethane, (2) a polyvinylformal binder, a phenoxy resin, a cellulose ester or a vinyl chloride copolymer and (3) an OH-containing polyurethane which is crosslinked with polyisocyanates.