Abstract: Flexible multi-layer magnetic recording media comprising a non-magnetic flexible base and, applied thereto, two superposed magnetizable layers which contain a homogeneous mixture of acicular magnetic chromium dioxide in an organic binder.According to the invention, the magnetizable layer adjacent to the base contains a chromium dioxide having a specific surface area, measured by the BET method, of from 15 to 25 m.sup.2 /g, while the outer magnetic layer contains a chromium dioxide having a specific surface area, measured by the BET method, of from 26 to 35 m.sup.2 /g.Such magnetic recording media are distinguished by uniformly high sensitivity over the entire audible frequency range even if close manufacturing tolerances are not maintained.

Abstract: A magnetic thin film storage device of simplified design working on the shift register principle and comprising a flat support to which a ferromagnetic layer has been applied, which layer contains regions of different coercivity, lower-coercivity regions being surrounded by regions of higher coercivity, and also comprising electric conductors extending in planes which are parallel to the support, the conductors serving to produce the magnetic fields required to propagate magnetic domains into the lower-coercivity regions, at least one group of channels being provided which terminate in the same enlarged lower-coercivity area, and the magnetic domains contained in the channels terminating in the said enlarged area being propagated individually and consecutively into that enlarged area.

Abstract: Liquid prepolymers are prepared by interpolymerizing monomers including a hydroxy aromatic compound, an aldehyde and furfuryl alcohol. The resultant liquid prepolymers have a viscosity of about 100-500,000 centipoises at 25.degree. C. and contain about 1.1-6 moles of interpolymerized aldehyde and about 3.1-15 moles of interpolymerized furfuryl alcohol for each mole of interpolymerized hydroxy aromatic compound. The prepolymers are highly reactive and may be polymerized with or without other monomers to produce flame retardant solid or cellular interpolymers. In one variant, flame retardant solid or cellular polymers are produced by interpolymerizing organic polyisocyanates with the prepolymers. In another variant, solid or cellular interpolymers are produced by polymerizing the prepolymers without monomers such as polyisocyanate in the presence of unreacted furfuryl alcohol. Processes are provided for preparing the aforementioned novel liquid prepolymers and solid or cellular interpolymers.

Abstract: Liquid oxyalkylated polyol prepolymers are prepared by oxyalkylating a prepolymer prepared from a hydroxy aromatic compound, an aldehyde and furfuryl alcohol with an alkylene oxide containing about 2-4 carbon atoms. The oxyalkylated polyol prepolymers have a viscosity of 1000-500,000 centipoises at 25.degree. C. and contain about 1.1-6 moles of interpolymerized aldehyde, about 3.1-15 moles of interpolymerized furfuryl alcohol, and about 1-10 moles of interpolymerized alkylene oxide for each mole of interpolymerized hydroxy aromatic compound. The resultant prepolymers are highly reactive and may be further polymerized with or without monomers such as polyisocyanate to produce flame retardant solid or cellular interpolymers. Flame retardant solid or cellular polyurethanes are prepared in one variant by interpolymerizing organic polyisocyanates with the oxyalkylated polyol prepolymers. In another variant, flame retardant closed cell cellular interpolymers are provided.

Abstract: Flame-proofed linear polyesters containing, as flame-proofing agents, halogenated oligomeric styrenes and synergistic compounds.

Abstract: This invention deals with porous, substantially foam-free composite material of grainy solid material particles of a certain grain size, which is solidified with a binder mixture of isocyanate-group-containing prepolymers, water, and possibly auxiliaries, and the manufacture and application of such products.

Abstract: Symmetrical carotenoids are prepared from the half-molecules by dimerizing the phosphonium salts of the half-molecules with peroxides, peroxo compounds or peroxy compounds in an alkaline medium.

Abstract: Reaction of 1-hydroxy-2-ketones of the general formula R-- CO-- CH.sub.2 OH, where R is a short alkyl, with ammonia gives a new compound ##STR1## which on hydrogenation gives 2-amino-1-alcohols; the yield can be improved by carrying out the hydrogenation in the presence of ammonia.

Abstract: Thermoplastic compositions based on mixtures of a vinyl chloride polymer and conventional reinforcing agents.The compositions contain a linear polyester, which is solid at room temperature and is compatible with the vinyl chloride polymer, as a processing assistant.The thermoplastic compositions may in particular be used for the manufacture of injection moldings.

Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.

Abstract: Production of N-alkylated cyclic alkylenimines by reaction of cyclic alkylenimines with an alcohol or ether in the gas phase in the presence of a high-area SiO.sub.2 /P.sub.2 O.sub.5 catalyst.

Abstract: A process for the manufacture of fibrids by dissolving, in a solvent, macromolecular waste materials from the bead polymerization of styrenes, and introducing the solution into a precipitation medium under the action of shearing forces to form fibrids.

Abstract: Sulfamic acid halides are produced by reaction of sulfamic acids with phosphorus pentahalide in the presence of phosphorus oxyhalide in specific molar ratios and in the presence of halohydrocarbons. The products, some of which are new compounds, are starting materials for the manufacture of plant protection agents, dyes and pharmaceuticals.

Abstract: A process for converting crude copper phthalocyanine to a pigmentary form, wherein finely divided and heavily agglomerated crude copper phthalocyanine which exhibits disturbed crystallization and which has a primary particle size of less than 0.1 .mu.um is introduced into an organic or aqueous organic medium together with from 0.5 to 7% by weight, based on the crude copper phthalocyanine, of a basic copper phthalocyanine of the formula ##STR1## or of mixtures thereof (where CuPc is an n-valent copper phthalocyanine radical, R.sup.1 is H or alkyl of 1 to 4 carbon atoms, A is linear or branched alkylene, R.sup.2 is alkyl of 1 to 20 carbon atoms, alkoxyalkyl of 3 to 12 carbon atoms or cycloalkyl of 6 to 8 carbon atoms, R.sup.3 is H, alkyl of 1 to 4 carbon atoms or cycloalkyl of 6 to 8 carbon atoms or ##STR2## is a saturated heterocyclic 5-membered, 6-membered or 7-membered ring, and n is an integer from 1 to 6), and the suspension is heated at from room temperature to 180.degree.

Abstract: Impact-resistant thermoplastic molding compositions having a hard component comprising a styrene/acrylonitrile copolymer and a soft component comprising a graft copolymer of styrene and acrylonitrile on a rubbery polymer containing butadiene. The rubbery polymer serving as base for the graft copolymer is produced by polymerization or the monomer of monomers forming said polymer in aqueous emulsion and in the presence of a small amount of an alkanol of from 1 to 4 carbon atoms. The compositions have improved color and color stability and may be processed by conventional methods to form shaped articles.

Abstract: Mixtures of high molecular weight polyacrylamides in the form of a water-in-oil polymer dispersion and containing in the inner phase from 99.99 to 95% w/w of a cationic polyacrylamide and from 0.01 to 5% w/w of an anionic polyacrylamide or from 99.99 to 95% w/w of an anionic polyacrylamide and from 0.01 to 5% w/w of a cationic polyacrylamide, all percentages being based on the total amount of polymer. The said polymer mixtures are particularly effective retention aids and flocculants and are preferably used in the manufacture of paper as pulp additives.

Abstract: Novel 4-(m,m'-di-t-butyl-p-hydroxyphenyl)-butyl-2 compounds which are intermediates in the manufacture of dyes, pesticides and plastics auxiliaries, particularly stabilizers for polyolefins and polyamides. When molten, they form specific solvents for alkylphenols and are perfumes or form ingredients of perfume compositions having a fruity odor.

Abstract: Wood preservatives containing a boric acid/alkylene oxide adduct, with alkylene of 2 to 8 carbon atoms, and a process for protecting wood against fungi and insects with this agent.

Abstract: New and valuable triazole derivatives having a good fungicidal action, fungicides containing these compounds as active ingredients, and methods of combatting fungi with these compounds.

Abstract: Copolyamides which are manufactured using (A) from 1 to 60 parts by weight of a cyclic lactam of 6 to 12 carbon atoms and/or an .omega.-aminocarboxylic acid of 6 to 20 carbon atoms and (B) from 40 to 99 parts by weight of the salt of at least two different dicarboxylic acids of the general formula HOOC-R-COOH where R is an aliphatic or cycloaliphatic radical of 4 to 46 carbon atoms with (a) cycloaliphatic and/or aliphatic diamines of 4 to 20 carbon atoms, which possess at least one secondary amino group and (b) optionally, up to 0.3 equivalent of primary .alpha.,.omega.-diamines of 2 to 20 carbon atoms, are excellent hot-melt adhesives.