Abstract: The oxidation promoting harmful effects of the presence of an alkaline catalyst in a polyoxyalkylene can be eliminated and the product made more resistant to oxidation especially at elevated temperatures by the incorporation therein of soluble salts of certain benzoic acid derivatives. The soluble salts can be formed by reaction with the alkali or alkaline earth metal ion derived from the alkaline catalyst utilized in the polymerization of the polyoxyalkylene.

Abstract: The invention relates to a process for the preparation of polyurethane or polyurethane-polyurea molded parts by reacting organic polyisocyanates, polyols and chain extenders in the presence of monocyclic amidines having the formula ##STR1## as catalyst or catalyst mixtures of monocyclic amidines having the formula (I) and (a) tertiary amines, (b) metal salts having the formula Me X.sub.n Y.sub.m (II), and/or (c) optionally-substituted aliphatic carboxylic acids. R.sup.1 and R.sup.2, Me, X, Y, n, and m are defined herein.

Abstract: Multi-layer photopolymer elements, which are suitable for the production of relief printing plates and contain photosensitive polyvinyl alcohol/monomer layers which can be developed with water, can be improved in respect of their production, drying and shelf life by the application of a thin layer of a highly hydrolyzed low molecular weight polyvinyl alcohol.

Abstract: The subject invention relates to polyol compositions which are alkylene oxide adducts of a mixture of initiators comprising vicinal toluenediamine and an initiator selected from the group consisting of glycerin, pentaerythritol, sucrose, sorbitol, trimethylolpropane, and mixtures thereof. Low molecular weight diols may also be used as a co-initiator in combination with the glycerin, pentaerythritol, sucrose, sorbitol, trimethylolpropane, and mixtures thereof.The subject polyol compositions are particularly useful in the preparation of rigid polyurethane foams.

Abstract: M-Type ferrites of the formula AFe.sub.12 O.sub.19, Me.sub.2 Y-type ferrites of the formula A.sub.2 Me.sub.2 Fe.sub.12 O.sub.22 or spinel-type ferrites of the formula MeFe.sub.2 O.sub.4, where A is Ba, Sr, Pb and/or Ca and Me is Zn, Mn, Co, Cu, Fe(II) and/or 1/2(Li(I)+Fe(III)), are prepared by a process wherein iron(II) sulfate hydrate is dehydrated and oxidized and then mixed with sodium carbonate and/or potassium carbonate and salts and/or oxides of other A and/or Me cations required in addition to Fe(III) for ferrite formation, the mixture is heated at from 700.degree. to 1,200.degree. C., and the resulting ferrite is isolated by leaching with water.

Abstract: It has been discovered in accordance with the instant invention that a process which combines a relatively low temperature heat treatment of precipitated Alkali Blue slurry with subsequent freeze drying of the presscake yields a product which exhibits superior tinting strength and dispersion properties as well as excellent texture.

Abstract: Metalized recording papers contain, located on a paper web, a firmly adhering varnish coating in which mineral fillers and/or pigments combined with wax particles are embedded and the external surface of the varnish coating is covered with a metal layer, preferably an aluminum layer obtained by vacuum evaporation.

Abstract: N-Methoxy-N-methylurethanes are prepared by a process in which first (1) hydroxylamine is converted with an alkyl chloroformate to the corresponding N-hydroxyurethane, then (2) this product is reacted with a methylating agent to give the N-methoxy-N-methylurethane, and finally (3) the N-methoxy-N-methylurethane is isolated. In this process, first, (1) while maintaining a certain temperature and a certain pH, (1.1) an aqueous solution of an inorganic hydroxylammonium salt is mixed thoroughly with (1.2) an equimolar amount of an alkyl chloroformate, then (2) while maintaining a certain temperature and a certain pH, (2.1) a mixture comprising (2.1.1) the reaction mixture obtained as described in (1), (2.1.2) a water-insoluble organic solvent and (2.1.3) a phase-transfer catalyst is mixed thoroughly with (2.2) a water-insoluble methylating agent which is soluble in the solvent under (2.1.

Abstract: The oxidation promoting harmful effects of the presence of an alkaline catalyst in a polyoxyalkylene can be eliminated and the product made more resistant to oxidation especially at elevated temperatures by the incorporation therein of soluble salts of certain benzoic acid derivatives. The soluble salts can be formed by reaction with the alkali or alkaline earth metal ion derived from the alkaline catalyst utilized in the polymerization of the polyoxyalkylene.

Abstract: Polypyrrole films are produced by electrochemical polymerization of a pyrrole, or a mixture of a pyrrole with other comonomers, in an electrolyte solvent in the presence of a conductive salt, by a continuous process wherein the pyrrole polymer is deposited in the form of a film on anodic material which has a sheet-like structure and is passed continuously through the electrolyte solution.As shown in FIG. 1, this procedure can be carried out in an electrolysis vessel (1) which contains the electrolyte solution (2), a cathode (3) which dips into this solution, and, as the anode, a rotating cylindrical roller (4) which is partially or completely immersed in the electrolyte solution (2); the polypyrrole film (6) is deposited on the anodic surface (5) of the cylindrical roller (4), and is subsequently removed therefrom.

Abstract: A process for the preparation of a diacyloxyhexadiene of the formula ##STR1## where X is R.sup.9 -CO- and R.sup.1 to R.sup.9 are hydrogen or alkyl of 1 to 3 carbon atoms, by reacting a hexatriene of the formula ##STR2## with oxygen and a carboxylic acid of the formula R.sup.9 COOH in the presence of a catalyst which contains palladium, platinum or a salt of these metals.

Abstract: Polymers which comprise polyene units possessing 5 or more conjugated aliphatic C-C double bonds and contain 1,9-disubstituted phenalenes as chemically bonded side groups are prepared by a process in which acetylene derivatives carrying 1,9-disubstituted phenalene groups are polymerized. The polymers obtained are used in the electrical industry or as reversible redox systems or for the antistatic treatment of plastics.

Abstract: A process for hydrogenating coal which has been mixed with oils, by bringing the coal slurry to the reaction pressure by pumping, heating the slurry and catalytically hydrogenating it with hydrogen, wherein some or all of the hot gases and vapors formed during hydrogenation are intimately re-mixed with the coal slurry in a plurality of stages. After the first mixing stage, the gases are freed from the product, and the product-free gases, especially hydrogen, are used as a thermal medium.

Abstract: Blue iron hexacyanoferrate-III pigments are produced by a process wherein complex iron-II hexacyanoferrate-II (Berlin white) is prepared by electrolysis of an aqueous catholyte solution containing (a) an iron-II salt, (b) an alkali metal salt, an ammonium salt or a mixture of these, and (c) hydrogen cyanide, in an electrolysis cell in which the anode chamber and cathode chamber are separated by an ion exchange membrane, using an electrically conductive aqueous liquid in the anode chamber, and the iron-II hexacyanoferrate-II obtained is then converted to the blue pigment.The process gives Berlin white, which is substantially free from salt, in high yield and high purity. Pollution caused by the process is very low, since only a small amount of salt is produced. Compared with the corresponding blue pigments produced by prior art processes, the pigments obtained give purer colorations with better gloss, and are of higher color strength.

Abstract: The use of a dye of the general formula I ##STR1## where R is a heterocyclic radical, X is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto and Y is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto, and the ring A can be additionally substituted, in an electro-optical display containing liquid crystals, and a liquid-crystal mixture containing a dye of the general formula in claim 1.

Abstract: 3-Alkyl-3-acyloxy-4-hydroxybut-1-enes are prepared by a process in which a 3-alkyl-3,4-epoxybut-1-ene is treated with a carboxylic acid and a copper salt of a carboxylic acid.

Abstract: A process for the preparation of .alpha.,.beta.-unsaturated aldehydes by reacting a 1,4-diacyloxyalk-2-ene, which is substituted in the 2-position by an aliphatic radical, with water in the presence of an acid, and of 2,7-dimethylocta-2,6-dienal.

Abstract: Water-soluble homopolymers and copolymers of di-C.sub.1 -C.sub.3 -alkylaminoneopentyl (meth)acrylates, the homopolymers and copolymers having a K value of from 150 to 300, are used as retention agents, drainage agents and flocculants in papermaking. Increased retention, drainage rate and flocculation are achieved in comparison with the conventional basic polyacrylates.

Abstract: This invention relates to a process for utilizing the sediments in pure MDI which comprises(a) heating the sediments at temperatures of 180.degree. C. to 250.degree. C. for 0.25 hour to 6 hours in the presence of crude MDI; and(b) cooling the product to a temperature of 60.degree. C. or less within 5 minutes.The sediment-free crude MDI which results can then be used for the preparation of polyurethane products.

Abstract: Relief images or resist images are produced by a negative-working process, using a photosensitive resist layer which is applied on a base and contains a compound possessing two or more aromatic and/or heteroaromatic o-nitrocarbinol ester groups as well as a crosslinking compound possessing two or more reactive groups which are capable, under the action of heat, of reacting with carboxyl groups to form a covalent chemical bond. To produce the relief images or resist images, the photosensitive resist layer is first exposed imagewise to actinic light, the exposed areas of this layer are subjected to selective thermal hardening and crosslinking and the resist layer is then post-exposed uniformly to actinic light and finally washed out with an aqueous developer.