Abstract: Valuable substituted 2,1,3-benzothiadiazin-(4)-one-2,2-dioxides having a herbicidal action, herbicides containing these active ingredients, a process for controlling the growth of unwanted plants with these compounds, and processes for their manufacture.

Abstract: Photopolymerizable binders for UV-curing printing inks and coating compositions, which contain benzophenone-based photoinitiators and photosensitizers including p-dimethylaminobenzaldehyde and esters of p-dimethylaminobenzoic acid.

Abstract: Fibrids of polyolefins showing a high degree of fibrillation and a high specific surface area are obtained by flashing a pressurized solution or polyolefin in pentane or in a pentane-containing solvent by passing said solution through an orifice into a space which is at a lower pressure and in which shearing forces are applied to said solution. The fibrids directly obtained may be used, for example, for the manufacture of paper or for the manufacture of textile-like webs.

Abstract: In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.

Abstract: Fibrids of polyolefins showing a high degree of fibrillation and a high specific surface area are obtained by flashing a pressurized solution of polyolefin in pentane or in a pentane-containing solvent mixture at a temperature above the boiling point of the solvent by passing said solution through an orifice into a space which is at a lower pressure and in which shearing forces are applied to said solution. The fibrids directly obtained may be used, for example, for the manufacture of paper or for the manufacture of textile-like webs.

Abstract: Dye intermediates of the formula ##STR1## where R.sup.1 is hydrogen, alkyl of 1 to 12 carbon atoms, phenyl which is unsubstituted or substituted by alkyl of 1 to 4 carbon atoms, methoxy, ethoxy, chlorine or bromine, or phenylalkyl of 7 to 10 carbon atoms, R.sup.2 is hydrogen or R.sup.1 and R.sup.2 together are dimethylene, trimethylene or tetramethylene, which are unsubstituted or substituted by alkyl of 1 to 12 carbon atoms, R.sup.3 and R.sup.5 are hydrogen, alkyl of 1 to 12 carbon atoms, cyano-, chlorine-, methoxy- or ethoxy-substituted alkyl of 2 to 4 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, phenylalkyl of 7 to 10 carbon atoms or trimethylene which is unsubstituted or substituted by 1 to 3 methyl and is bonded to the carbon atom in the 6-position or 6'-position of the benzene ring, R.sup.4 and R.sup.

Abstract: A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of the metals aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal from catalyst component (2) being from 1:0.1 to 1:500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (IV) obtained by bringing into contact (1.1) a finely divided, porous, inorganic oxidic material (I) which has the formula SiO.sub.2 . aAl.sub.2 O.sub.3 --, where a is a number from 0 to 2, and (1.2) a solution (II) formed on bringing together (IIa) 100 parts by weight of an alcohol of the general formula Z--OH, where Z is a saturated hydrocarbon radical of 1 to 8 carbon atoms, (IIb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IIc) from 0.

Abstract: A turnaround control arrangement for a color video recording and playback system, in which a color burst frequency at turnaround time is recorded during a certain vertical blanking interval in a distinct pattern; and in which, in playback the tape reversal operation is initiated at least partially under control of this distinct pattern. This "turnaround flag" is also used to control the insertion of the sound signal carrier frequency of the system during turnaround, thereby to reduce the noise due to the loss of the recorded sound signal during turnaround in playback.

Abstract: Curable unsaturated quick-thickening polyester resin molding compositions are obtained by adding special onium salts as thickening accelerators to unsaturated polyester resins.

Abstract: A process for the manufacture of olefin polymers by polymerizing .alpha.-monoolefins of 2 to 8 carbon atoms by means of a catalyst which is obtained from a silicate carrier (component a), an organo-metallic compound containing alkoxide groups (component b) and a chromium compound (component c), wherein the catalyst employed is obtained by (1) first charging (1.1) a finely divided porous xerogel (component a) of the formula SiO.sub.2 . m Al.sub.2 O.sub.3, where m is a number from 0 to 2, with (1.2) a particular aluminum compound containing alkoxide groups (component b), (2) then charging (2.1) the product obtained from stage (1) with (2.2) a particular chromium compound (component c) by treatment with a solution of the chromium compound, with intimate mixing and evaporation of the solvent and (3) finally heating the product, obtained from stage (2), in an anhydrous stream of gas containing oxygen.

Abstract: A yarn severing and holding apparatus for use in a system for changing spinning cans in which synthetic filamentary yarns are deposited. In this apparatus an arm supported, independently of the can transporting means, for rotation at a level between the yarn feeding device and the cans, has a slide mounted thereon for traversing movement lengthwise of the arm. This slide carries a cutting device and also a device for clamping the severed end of the yarn deposited in the full can. This insures that the cut off end of the yarn cannot drop back into the full can and that on the other hand the free end can drop into the still empty can immediately after the cutting operation. Moreover, the severing and holding apparatus is physically divorced from the can-transporting means so that the latter may be designed for either rotational or translational movement.

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

Abstract: Winding machines having a traversing member, a contact roller, said roller or a winding tube chuck being mounted on a linearly movable carriage moved by piston-cylinder members, pneumatically operated control systems connected with said piston-cylinder members to move said carriage horizontally or vertically relative to the winding package or the contact roller, and frictionlessly operating membrane cylinder(s) mounting a support member for the carriage-mounted chuck or contact roller on the carriage, the pneumatic control system and membrane cylinder(s) maintaining constant pressure between the winding package and contact roller.

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: 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: A process for the stabilization of a polymer which is a barium, strontium and/or calcium complex of polyterephthaloyl oxalamidrazone or polydiphenylether-dicarboxylic acid-4,4'-oxalamidrazone wherein the polymer is treated in an acidic to neutral aqueous solution, e.g. at pH of 1 to 7, containing an acid or salt compound selected from the group consisting of oxalic acid, alkali oxalate, alkali sulfite, alkali hydrogen sulfite, alkali dithionite and alkali hydrogen sulfate. The resulting product has a much improved resistance to UV, oxidation and hydrolysis. Such polymers are especially useful in the form of flame-retardant threads, yarns, filaments, fibers, felts, fabrics and the like.

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: 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.