Abstract: An apparatus for the manufacture of a jacket, comprising two cover sheets joined to one another, for a flexible disk for data recording, the cover sheets and the nonwoven lining being punched out in the form of blanks including the functional apertures, and the cover sheet blank and the nonwoven blank being joined to one another and then folded to form the jacket, wherein the sheet material for the cover sheets is transferred from a magazine, with the aid of mechanical, air-operated grippers provided with positioning means, to an assembly surface and is there positioned, the sheet of nonwoven material from a second magazine is tacked onto the cover sheet material by spot-welding and is then joined thereto over the entire surface by thermal welding, thereafter the cover sheet material thus provided with the nonwoven covering is transferred to a holder frame and then conveyed, with this frame, to a punching device where it is punched out to form a blank provided with the functional apertures, subsequently the b

Abstract: This invention relates to a process for the manufacture of stable polyol-filler dispersions. The polyol-filler dispersions are prepared by the crushing of fillers in situ in polyols employing high localized energies.

Abstract: A process for preparing a flame-retardant antistatic polymer additive useful for incorporation into the melt prior to extruding fibers or other polymers or for dispersing on fibers. Improved flame-retardant properties are obtained by including with said flame-retardant additive an effective flame-retardant proportion of a compound from group Vb of the periodic table.

Abstract: A pair of electrical switches are arranged to be engaged by a respective pivoted carriage member, to indicate the end of tape in correlation with the diameter of a tape reel mounted on each carriage member. Each switch is generally contained within a housing having a longitudinal axis. A pair of electrical contacts, each interconnected to the circuitry of the system, are positioned within the housing adjacent to the axis. A plunger is adapted to be operable along the longitudinal axis between the two contacts and has one end extending from the housing to act as an actuator. A yoke has a base threadedly secured to the plunger and has a body extending parallel with the plunger within the housing. An elastic shorting member is partially compressed and positioned within the body of the yoke. The elastic shorting member is adapted to engage the electrical contacts to conduct electricity through the switch.

Abstract: A device for compensating for an inequality between the d.c. magnetic fields set up by the two oppositely acting windings, respectively, of the magnetic heads of a data storage device, particularly a disc memory, and a data storage apparatus including such a device, the device comprising means for generating a compensating direct current and feeding this current at the appropriate time to a predetermined one of the two windings of the magnetic heads. The magnitude of the compensating direct current is advantageously adjusted in dependence on the instantaneous magnitude of the write current.

Abstract: Flame-retardant antistatic polymer additives are provided which inhibit the buildup of electrostatic charges upon the addition of such compositions to synthetic polymeric fibers, i.e., polyamide fibers, and at the same time do not contribute to the flammability characteristics of such polymeric fibers. The flame-retardant antistatic polymer compositions are useful in combinations with fibers such as polyamide, polyester, polyurea, polyurethane, polysulfonamide, polyolefin and polyacrylic fibers. The antistatic effect is obtained by the process of coating the fibers or dispersing in or on the fibers up to about 12 percent by weight of a polymer composition which is the reaction product of:(a) a polyoxyalkylene compound or polyester thereof and(b) at least one reactant selected from the group consisting of (1) a diol, (2) a polyester and (3) an aliphatic or aromatic diacid or derivative of (3), wherein at least one said reactant is halogenated.

Abstract: A process for the preparation of 3,3-dimethyl-pent-3-enoic acid amides of the formula I ##STR1## where R.sup.1 and R.sup.2 may be identical or different and each is alkyl of 1 to 4 carbon atoms, or R.sup.1 and R.sup.2 together with the nitrogen on which they are present as substituents form a 5-membered or 6-membered saturated ring which may contain a further hetero-atom,wherein an acetamido-acetal or ketene-acetal-aminal is reacted with 3-methyl-but-2-en-1-ol at from 80.degree. to 220.degree. C., in the presence or absence of an inert organic solvent. The products are valuable intermediates for the preparation of insecticidal cyclopropanecarboxylic acid esters.

Abstract: This invention relates to a process for preparing cellular polymers having urethane groups, isocyanurate groups, or both. The cellular polymers are prepared by reacting an organic polyisocyanate with certain polymer dispersions in the presence of a blowing agent.The polymer dispersions comprise(a) as a continuous phase, a polyol having a functionality of 2 to 8 and a hydroxyl number of 150 to 700; and(b) as a dispersed phase, an organic compound having(a) at least one Zerewitinoff active hydrogen atom,(b) a melting point of 30.degree. C. to 260.degree. C., and(c) a molecular weight of 178 to 100,000.

Abstract: A process for simultaneously removing water and hydrogen sulfide from gases containing both of these by treating the gases, in an absorption zone under superatmospheric pressure, with polyethylene glycol dialkyl ethers as a solvent, stripping the hydrogen sulfide from the loaded solvent, obtained from the absorption zone, in a desorption zone, removing the water, taken up in the absorption zone, from the solvent and recycling the regenerated solvent to the absorption zone, wherein the solvent additionally contains from 0.01 to 20% by weight, based on the solvent mixture, of an alcohol or ether boiling in the range from 50.degree. to 140.degree. C.

Abstract: An improved paper-coating composition containing, per 100 parts by weight of finely divided pigment, from 5 to 25 parts by weight of one or more copolymers, having a glass transition temperature of from -40.degree. to 50.degree. C., in the form of an aqueous dispersion, and from 0.1 to 10 parts by weight of one or more water-soluble or water-swellable co-binders selected from the group comprising polyvinyl alcohol, cellulose ethers, starch, casein, alginates and high molecular weight carboxyl-containing emulsion polymers. The co-binder is added to the paper-coating composition in the form of a water-in-oil emulsion. Paper-coating compositions having high water retention are obtained, and papers coated with such compositions have improved water resistance.

Abstract: An improved process for the production of polymers of acrylic acid or methacrylic acid by polymerizing acrylic acid or methacrylic acid in isopropanol or in a water-isopropanol mixture containing at least 40% by weight of isopropanol in the presence of polymerization initiators at a temperature of from 120.degree. to 200.degree. C. under pressure. The polymers obtained are used as dispersing agents for inorganic pigments.

Abstract: In a process for the preparation of a carboxylic acid ester of .beta.-formyl-crotyl alcohol by rearrangement of the corresponding carboxylic acid ester of 2-formyl-2-hydroxy-but-3-ene or of an acetal or acylate thereof in the presence of copper or a copper compound, followed, where relevant, by hydrolytic cleavage of the acetal or acylate, more especially in the preparation of 4,4-dimethoxy-3-methyl-crotyl acetate, the yield is improved by carrying out the rearrangement in the presence of copper (I) chloride as the catalyst and ensuring that low-boiling by-products formed during the rearrangement are removed.The products are of great importance as starting materials for an industrial synthesis of vitamin A and its derivatives.

Abstract: A process for purifying caprolactam, which has been obtained by a Beckmann rearrangement, by extracting crude caprolactam with solvents, distilling the extract in the presence of alkali, and isolating pure caprolactam, wherein, in a first stage, caprolactam is distilled from the alkaline distillation residue at a bottom temperature of 130.degree.-160.degree. C., and is recycled to the distillation stage, the residue thus obtained is distilled, in a second stage, at a bottom temperature of 140.degree.-180.degree. C., and the distillate is treated with strongly acidic agents in a third stage and is then recycled to the extraction stage.

Abstract: A crystalline SiO.sub.2 --modification, which is characterized by an X-ray diffraction diagram having certain diffraction lines, and a process for the preparation of this crystalline SiO.sub.2 --modification by crystallizing reactive amorphous SiO.sub.2 under hydrothermal conditions in the presence of hexamethylenediamine. Sodium ions, phosphate ions and/or sulfate ions may be added for the crystallization.

Abstract: This invention relates to a method for producing a pigment-organic vehicle product, commonly referred to as "flush" by those versed in the art, which comprises forcing a pigment-containing aqueous pulp-organic vehicle mixture through a chamber comprising a set of at least two adjoining partial cylindrical surfaces, said chamber having defined at one end thereof at least one axial opening and at least one second opening spaced from the axial opening. The mixture is forced through the chamber and axial opening by a set of at least two rotating helical surfaces whereby the product is extruded through the axial openings. The water exits from the chamber through the second opening or openings.

Abstract: To destroy phosgene contained in gases, the phosgene is decomposed catalytically in the presence of active carbon by hydrolysis with water vapor, in the absence of liquid water, at above the dew point of water.

Abstract: New thiolphosphoric acid-S-4-nitro-2-trichloromethylphenyl esters of the formula ##STR1## where X denotes oxygen or sulfur, and R.sup.1 and R.sup.2 are identical or different and each denotes a substituted or unsubstituted aliphatic radical of 1 to 18 carbon atoms or a substituted or unsubstituted alicyclic radical of 5 to 18 carbon atoms, processes for their manufacture, fungicides containing these compounds as active ingredients, their manufacture, and processes for combating fungi with these novel compounds.

Abstract: New N-arylpropyl-substituted amines, and salts, molecular compounds and adducts thereof, having a good fungicidal action, fungicides containing these compounds, and processes for manufacturing these compounds.

Abstract: Novel addition polymers of dimorpholone compounds and diamines, which contain structural units of the general formula ##STR1## where X and Y may be various conventional organic radicals, are obtained by reacting dimorpholone compounds with diamines. The polymers may be used for modifying plastics, and for textile or paper finishing.

Abstract: A process for printing textile materials consisting of cellulosic fibers, or of blends of cellulosic fibers and synthetic fibers, using a print paste which contains a synthetic thickener and a disperse dye, with or without conventional assistants, and, per 1,000 parts by weight of print paste, from 40 to 250 parts by weight of an N-methylol compound or N-methylol-ether compound of urea, of a urea derivative or of a carbamic acid ester, the print being fixed at an elevated temperature. The resulting prints have exceptionally good washfastness.