Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on finely divided magnetic pigment dispersed in organic binders, which coating contains, according to the invention, salts of long-chain basic polyaminoamides with high molecular weight organic acid esters.Such magnetic recording media exhibit improved mechanical resistance and improved adhesion of the coating to the base, coupled with advantageous electromagnetic properties.

Abstract: Mixtures based on vinyl chloride polymers and small amounts of copolymer of an ester of acrylic acid or methacrylic acid, which mixtures have been obtained by polymerization of vinyl chloride in the presence of the above copolymer. The said copolymer contains acrylic acid ester or methacrylic acid ester units, units which contain a lactone ring structure, and, optionally, units of other copolymerizable monomers. The mixtures exhibit improved processability and may in particular be used for the manufacture of films, sheets and the like.

Abstract: To separate solid particles from liquids or gas, the liquid or the gas is passed through a coil, formed from one or more threads wound on a carrier. After subsequent washing and drying, the solid which has been filtered out during the filtration process is removed by unwinding the coil from the carrier, the latter consisting of a permeable hollow cylinder closed at both end faces by means of end plates, and provided with a feed orifice.

Abstract: The invention relates to a process for the manufacture of improved magnetic discs by applying a thin layer of a liquid dispersion of magnetic pigments and optionally further, non-magnetic, pigments in a binder mixture to a non-magnetic rigid base, and curing the magnetic coating which has been applied. The binder used is a mixture of polycondensates comprising 60 to 70% by weight of a solid curable polycondensate of 2,2-bis(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxy equivalent weight from about 400 to 2,500 and a melting point from about 50.degree. to 150.degree. C, 10 to 30% by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free methylol groups or with methylol groups etherified with a lower alcohol, and having a molecular weight of less than 1,000, and 10 to 30% by weight of a curable melamine-formaldehyde condensate with more than two methylol groups etherified with n-butanol or iso-butanol, and having a molecular weight of less than 2,500.

Abstract: A dye salt of the formula ##STR1## WHEREIN Me is cobalt or chromium, X is --O-- or --COO--, Y and Y' each is hydrogen, chlorine or nitro, n is 1 or 2, a + b = n + 1 and neither a nor b is zero, the R substituents make up the organic residue of metallizable azo dyes, A is a basic dye and B is an aliphatic amine in quaternized form. These dye salts have good solubility in alcohols, glycols and esters and are useful for the manufacture of transparent varnishes, printing inks and the like.

Abstract: Polymers reactive towards free amino groups, such as polyamides, polyureas, polyurethanes or polyesters, are provided with durable modified properties by being brought into contact with an additive polymeric material which (a) is compatible with the polymer being treated, (b) contains a plurality of oxyalkylene groups effective to impart to the modified polymer improved properties such as reduced static propensity, modified dyeability, or greater water absorbency; and (c) has one or more reactive sites, in the form of a pendant free primary amino group or potential primary amino group, blocked by the dehydration of an aldehyde or a ketone with the amine, which in either case affords the capability in proper circumstances of attaching the modifying polymeric material to the polymer being treated by a covalent chemical bond.

Abstract: Anthraquinones are manufactured by cyclizing o-benzoylbenzoic acids in the presence of oxygen-containing compounds of aluminum and silicon at elevated temperatures. The products are starting materials for the manufacture of dyes.

Abstract: In diaphragm-type electrolytic cells for the production of chlorine and caustic from alkali metal chloride solutions wherein the cell is equipped with one or more metal cathodes and anodes and an electrically conducting and structurally supporting anodic cell base there is provided a novel electrically non-conductive blanket. The anodes are provided with collars at one end thereof and the blanket and cell base are provided with corresponding openings to receive and support the anodes. The blanket openings are provided with an integral lip and shoulder wherein resilient gaskets are disposed around the anode stems and between the lip of the blanket and the collar of the anode.

Abstract: Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.

Abstract: A process and apparatus for producing magnetic discs in which the preferred direction of orientation of the anisotropic magnetic particles, contained in an organic binder system, is tangential to the circumference of the disc. Orientation is effected, prior to solidification of the magnetic layer, by the action of a magnetic field which is formed in the plane of symmetry between at least two pairs of magnetic poles, the poles of each pair being of the same polarity and opposite each other. One pair of poles flares out in cross section toward the plane of symmetry between the pairs of poles, whereas the other pair or pairs of poles of opposite polarity, when viewed in cross section, taper toward the said plane of symmetry to a point, the distance between the poles of such pair(s) being greater than that between the flared poles, and the plane of symmetry of the pairs of poles being in the plane of the disc.

Abstract: New substituted succinaldehyde monoacetals which are produced by introducing an .alpha., .beta.-unsaturated aldehyde bearing halogen, arylsulfonyl or alkylsulfonyl as a substituent in the .gamma.-position into a solution of an alkali metal alcoholate, an alkali metal glycolate or an alkali metal phenolate in a lower alcohol at a temperature of less than 50.degree. C. The new succinaldehyde monoacetals are of great interest as intermediates in the production of perfumes and of terpene derivatives of the type of juvenile hormones.

Abstract: This invention relates to a process for the manufacture of olefin polymers by polymerization of monoolefins with the aid of a silicic xerogel/chromium trioxide catalyst obtained by (1) synthesizing a particulate silicic xerogel, (2) doping this xerogel with chromium trioxide or a chromium compound which converts to chromium trioxide under conditions of stage (3) and (3) maintaining the resulting product at an elevated temperature in a water-free oxygen-containing stream of gas. The characteristic feature of the process of the invention is that the silicic xerogel/chromium trioxide catalyst used is one obtained by (1) synthesizing the silicic xerogel in the first stage as follows: (1.1) taking an aqueous solution of a sodium silicate, (1.2) substituting substantially all of the sodium ions contained in said solution by hydrogen ions by means of an ion exchanger, (1.3) introducing a water-soluble aluminum salt into the resulting aqueous silicic acid solution, (1.

Abstract: A process for the isolation of mixtures of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone which have a high content of .alpha.,.alpha.'-dinitroanthraquinones by heating a suspension of the crude dinitroanthraquinone mixture in certain organic liquids at from 60.degree. to 200.degree. C until solution equilibrium has been set up, and separating the undissolved material from the solution. The undissolved material contains more than 90% and as a rule more than 95% by weight of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone. The pure mixture of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone may be used for the manufacture of dyes.

Abstract: A synergistic fungicidal composition consisting essentially ofA. wettable sulfur andB. diisopropyl 3-nitroisophthalate, the weight ratio of a:b being from 2:1 to 5:1.

Abstract: A process for the production of 1,4-diaminoanthraquinone-2,3-dinitrile by the reaction of a diaminoanthraquinone of the formula (I): ##STR1## in which R.sup.1 and R.sup.2 independently of one another are hydrogen, chloro or bromo, with an ionic cyanide in a polar aprotic solvent, the reaction in the case when R.sup.1 and R.sup.2 are both hydrogen being carried out in the presence of an ammonium salt and the reaction product formed is dehydrogenated or the reaction is carried out with the ionic cyanide under dehydrogenating conditions.The process yields the dinitrile of formula (I) in which R.sup.1 = R.sup.2 = CN in a good yield and high purity.1,4-diaminoanthraquinone-2,3-dinitrile is a dye and an important starting material for the manufacture of dyes.

Abstract: 1,2,4-Dihydrotriazine-4-oxide-spiro-(3,1')-[oximino-(2')-cycloalkanes] are manufactured by reaction of oximinocycloalk-1-enes, substituted in the 1-position, with hydrazine. The products, especially the triazine derivative described in Example 1, possess antiphlogistic properties and are starting materials for the manufacture of dyes and pharmaceuticals.

Abstract: New 1,2,4-dihydrotriazine-4-oxides and a new process for the manufacture of 1,2,4-dihydrotriazine-4-oxides by reaction of oximino-cycloalk-1-enes, which are substituted in the 1-position, with hydrazine and ketones. The compounds I are pesticides and starting materials for the manufacture of pesticides.

Abstract: New and valuable substituted succinic acid oximidophosphoric esters having a strong insecticidal action, pesticides containing these compounds as active ingredients, a process for controlling pests with these compounds, and a process for their production.

Abstract: Disperse dyes of the formula ##STR1## in which D is the radical of a diazo component, Y is a linear or branched, unsubstituted or substituted alkylene of one to four carbon atoms;R.sup.1 is hydrogen, optionally substituted linear or branched alkyl of one to four carbon atoms, optionally substituted cycloalkyl or aralkyl, phenyl, or a radical of the formula: ##STR2## and R.sup.2 is hydrogen or C.sub.1 to C.sub.6 alkyl which may bear chloro, bromo or cyano as a substituent; andD and the rings A and B may bear one or more further substituents other than --SO.sub.3 H and --COOH;and also to their productions and their use for dyeing water-repellent fibrous materials. The dyes are eminently suitable for dyeing hydrophobic fibers, particularly polyesters, in yellow to blue-green shades of excellent fastness properties.

Abstract: Electrolytic filter press cell frames are provided with a polymeric protective covering which is either directly laminated thereonto or otherwise secured thereto. The protective covering is, preferably, a fluorinated hydrocarbon.