Abstract: Aqueous suspensions of polyolefin fibrids are prepared. To avoid foam formation and improve fiberbonding, small amounts of anionic agents are added to the suspensions. The suspensions are suitable for the manufacture of paper-like or textile-like web structures distinguished by very good fiber bonding and good initial wet strength.

Abstract: Graft copolymer dispersions of low viscosity and improved particle size distribution are prepared by mixing a free radical catalyst and a vinyl monomer in a static mixer and thereafter adding the catalyst-monomer mix to a polyol. The dispersions are low viscous liquids which may be advantageously employed in the preparation of polyurethanes.

Abstract: Process for the manufacture of t-butanol by hydration of isobutylene by reaction of isobutylene or isobutylene-containing C.sub.4 -hydrocarbon mixtures at moderately elevated temperature with aqueous sulfuric acid and isolation of the t-butanol from the resulting solution of t-butanol in water and sulfuric acid, wherein the reaction is carried out at temperatures of from 20.degree. to 45.degree.C using 20-48% w/w aqueous sulfuric acid, the t-butanol being separated from the t-butanol solution in water and sulfuric acid by extraction, at temperatures of from 0.degree. to 50.degree.C, with saturated or mono-olefinically or di-olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons containing at least 3 carbon atoms or with aromatic hydrocarbons of from 6 to 10 carbon atoms or with a mixture of said hydrocarbons, whereupon the t-butanol is isolated from the extracted mixture of t-butanol and hydrocarbon or hydrocarbon mixture.

Abstract: Herbicide compositions embodying a mixture of a 3-alkyl or cycloalkyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide or a salt thereof and methyl phenylcarbamates; and selective herbicide processes.

Abstract: An improved process for the manufacture of virtually bubble-free monofilaments of polyhexamethylene adipamide and having a thickness of more than 0.5 mm, wherein polyhexamethylene adipamide containing from 0.05 to 2% by weight of polystyrene finely dispersed therein is passed in the molten state through a sand filter having a particle size between 100 and 1,500 .mu.m and is immediately thereafter melt-spun into a cooling bath, followed by drawing.

Abstract: The production of glycol monoesters of .alpha.,.beta.-unsaturated carboxylic acids of three or four carbon atoms and 1,2-diols of two to four carbon atoms by the reaction of acids with 1,2-alkylene oxides of two to four carbon atoms at elevated temperature in the presence of catalysts and polymerization initiators and also of molecular oxygen as an additional agent for suppressing polymerization.

Abstract: Coating compositions hardenable by ionizing radiation comprising as binding agents a mixture ofA. at least 1 unsaturated olefin compound containing urethane groups, andB. at least 1 further unsaturated olefin compound that may be copolymerized,Characterized in that the unsaturated olefin compound (A) containing the urethane groups is a reaction product ofA. a compound of the general formula ##EQU1## WHERE N IS 1 OR 2, WHERE R stands for a straigt chain or branched alkyl group of valence n,Where R.sub.1 is hydrogen, methyl or the group ##EQU2## where R.sub.3 is a monovalent alkyl residue and WHERE R.sub.2 is hydrogen or methyl, andB. a compound containing at least 1 isocyanate group where the mixture of (A) and (B) may contain conventional additives of the lacquer industry.

Abstract: Laminates for the production of relief plates for flexographic printing, by imagewise exposure and washing out with a developer solution have, on a base optionally provided with an elastomeric layer, a photo-crosslinkable layer containing a photoinitiator and consisting of a polyurethane elastomer which has been prepared in a special manner from an aliphatic saturated polyesterglycol, an aliphatic diisocyanate, but-1-ene-3,4-diol and, if desired, another diol and which has a Shore A hardness of 30 to 90.degree. in the photo-crosslinked state, the elastomer being optionally mixed with a photo-crosslinked monomer.

Abstract: Process for the manufacture of graft polymers from copolymers of ethylene with vinyl esters, acrylates or methacrylates by grafting an ethylenically unsaturated carboxylic acid thereto in the presence of a free-radical polymerization initiator. Homogeneous graft copolymers are obtained from which sheeting can be made. To this end, the unsaturated carboxylic acid is first caused to diffuse into the copolymer and the mixture is then extruded at temperatures above the crystallite melting point of the ethylene copolymer.

Abstract: By reacting a proper proportion of an alkylene oxide with methylene dianiline (MDA), there is obtained a curing agent or cross-linking agent useful in place of methylene-bis-orthochloro aniline (MOCA) for making polyurethane foams. The invention provides a solution to the problem of finding a substitute for MOCA, which has become suspected as a carcinogen.

Abstract: A circuit for use in a magnetic video tape recorder/playback system capable of detecting not only amplitude loss due to tape defects or loss of head-tape contact, but also zero crossing loss due to an increase of sideband amplitude with respect to carrier amplitude in the playback signal. The circuit comprises a high speed voltage comparator coupled to a one-shot and OR gate arrangement to cause the insertion of a compensating video signal should the FM playback signal fail to have a zero crossing and pass through a threshold level within a predetermined time period.

Abstract: New and valuable N-cycloalkyl-, N-alkenyl- or alkynyl-substituted carbothiolates having a good herbicidal action, herbicides containing these compounds, a process for controlling the growth of unwanted plants with these compounds, and a process for producing these compounds.

Abstract: Self-extinguishing molding compositions based on polybutylene terephthalate which do not drip flaming particles on exposure to a flame and which contain a compound containing halogen, which is stable under the conditions required for processing the melt, and a synergistically active metal compound, are obtained by incorporation of a magnesium silicate of the chrysotile type into the polycondensate.

Abstract: 1,6-Hexanediol is manufactured by hydroformylation of 1,3-butadiene by a process wherein an acetal of pent-3-en-1-al is formed in a first hydroformylation step in the presence of lower alkanols or alkanediols and of rhodium catalysts, and is then converted into 1,6-hexanediol in a second hydroformylation step in the presence of cobalt catalysts, followed by hydrogenation.

Abstract: The use of composite cathodes comprising a metal substrate having thereon a coating of rhenium in electrolytic cells for the electrolysis of aqueous alkali metal halide solutions reduces the cell voltage requirements in comparison to the conventional ferrous metal cathodes traditionally used in such cells.

Abstract: A color video system in which the chrominance portion of a composite video signal, such as an off-air TV signal, is transmitted or recorded in the form of a trisequential sequence containing in lieu of the original colors R, G, B the substitute colors R', G' B', and in which at the receiving or playback end a luminance signal Y.sub.M =0.33(R'+G'+B') is derived from the trisequential substitute color signal, where R', G', B' are chosen so that Y.sub.M also satisfies the relationship Y.sub.M =0.30R + 0.59G + 0.11B required for black and white compatibility. The technique used at the transmitting or recording end obviates the necessity of first developing for this purpose the original colors and then deriving therefrom the substitute colors by the addition to the former of a separate signal Z= -0.03R + 0.26G - 0.22B, as proposed in the prior art.

Abstract: High molecular weight linear polycarbonates are prepared by continuous condensation of organic dihydroxy compounds and phosgene in two reaction zones, a mixture of an aqueous-alkaline solution of the organic dihydroxy compound and an aqueous catalyst solution being introduced at the rate of from 1 to 50 meters per second and the phosgene at the rate of from 30 to 300 meters per second into the first reaction zone and condensed, an organic solvent being incorporated into the resultant reaction mixture containing oligomer and polycarbonate and the condensation of the aqueous-organic reaction mixture carried to completion in the second reaction zone by the two-phase interfacial method.

Abstract: New and valuable 5-benzofuranyl esters having a good herbicidal action; herbicides containing these compounds as active ingredients; and a process for controlling the growth of unwanted plants with these compounds.

Abstract: Acrylonitrile polymer fibers are dyed level shades with basic dyes using as leveling agent a quaternary ammonium salt containing two or three benzyl groups as nitrogen ligands.

Abstract: Nonwovens of natural and synthetic fibers which are bonded uniformly over the whole cross-section are obtained by using as binders aqueous polymer dispersions containing as heat-sensitizing agents alkoxylated amines having inverse solubility and a pH of less than 6.