Abstract: A process for the production of thiuram polysulfides substituted by aliphatic, araliphatic and/or cycloaliphatic hydrocarbon radicals is disclosed. In this process, correspondingly substituted secondary amines having a pKa value of .gtoreq.8 are reacted with carbon disulfide and sulfur in a solvent at 0.degree. to 150.degree. C. in the presence of a metal-containing catalyst and oxygen or an oxygen-containing gas.By virtue of its high purity, the thiuram polysulfide obtainable in this way may be directly used for its intended purpose, for example as a vulcanization accelerator or sulfur donor.This process is particularly desirable for the substantially quantitative yields and selectivities and also for its high economy arising from the reaction being carried out in a single stage without expensive auxiliaries and from the elimination of an additional purification step.

Abstract: A process for the preparation of ethane and ethylene by oxidation of methane with oxygen at a temperature of 600.degree. to 900.degree. C., in which lead (II) oxide is used as catalyst (a) dispersed on a carrier of pumice, silicon carbide, zinc oxide, zirconium dioxide, and/or oxides of alkaline-earth elements, or (b) in a mixture with manganese (II) oxide dispersed on a carrier of pumice, silicon carbide, silicon dioxide, titanium dioxide, zirconium dioxide, zinc oxide, and/or oxides of alkaline-earth elements, or (c) without a carrier in a mixture with sodium silicate alone or in combination with silicon dioxide, titanium dioxide, zirconium dioxide, manganese (II) oxide, zinc oxide, and/or oxides of alkaline-earth elements. Ethane and ethylene are obtained with this process in high selectivities with good catalyst activities.

Abstract: A printed circuit element in which the outer conductor layers of the electrical components arranged on the outer conductor layers are provided with a cover layer. The cover layer includes a heat-sealable high-temperature adhesive joined to a layer of intractable fully aromatic polyimide.The described circuit elements show very good mechanical, thermal and electrical properties and may be used advantageously inter alia in electronics, radio technology, computer technology, electric motors, aircraft and aerospace and telecommunications.

Abstract: A multilayer laminate having at least one layer of a no longer formable fully aromatic polyimide and at least one layer of substrate material, the layer of no longer formable polyimide adhering directly on one side to the layer of substrate material with a peel strength of at least 4.0 N.cm. The layer of no longer also formable polyimide is also insoluble in phenolic solvents, has a tensile strength of from 100 to 150 N.mm.sup.2, a breaking elongation of from 15 to 100%, a dielectric dissipation factor of from 1.5.times.10.sup.-3 at 1 Khz. Additionally, a layer of heat-sealable high-temperature adhesive selected from the class of polyacrylates, polysulfone resins, epoxy resins, fluoropolymer resins, silicone resins or butyl rubbers is joined to that side of the polyimide layer which is remote from the substrate material.

Abstract: A multilayer laminate having at least one layer of a no longer formable fully aromatic polyimide and at least one layer of substrate material, the layer of no longer formable polyimide adhering directly on one side to the layer of substrate material with a peel strength of at least 4.0 N/cm. The layer of no longer also formable polyimide is also insoluble in phenolic solvents, has a tensile strength of from 100 to 150 N/mm.sup.2, a breaking elongation of from 15 to 100%, a dielectric dissipation factor of from 1.5.times.10.sup.-3 to 5.times.10.sup.-3 at 1 kHz. Additionally, a layer of heat-sealable high-temperature adhesive selected from the class of polyacrylates, polysulfone resins, epoxy resins, fluoropolymer resins, silicone resins or butyl rubbers is joined to that side of the polyimide layer which is remote from the substrate material.

Abstract: A process for the preparation of dithiazolyl disulfides by the catalytic oxidation of a 2-mercaptothiazole with ammonia and either oxygen or an oxygen-containing gas at a temperature of between 0.degree. and 150.degree. C.

Abstract: Method for the crosslinking of cathodically depositable coating agents, optionally containing pigment, dyestuff, filler, solvent, varnish adjuvant or additional crosslinking components, based upon a water-soluble or -dispersible nitrogen based cationic resin, at least partially present as salt, in which a cationic resin of molecular weight greater than 1000, containing 2 to 20 equivalents of double bonds per 1000 g, is contacted with sulfur and/or one or more sulfur-containing vulcanization acceleration. The coating mixture is then electrophoretically deposited upon an object, and hardened at temperatures above 120.degree. C. The resin may contain tertiary atoms of carbon, and also one or more sulfur-free vulcanization accelerators may be used.

Abstract: Blocked isocyanates of the general formula ##STR1## are obtained by converting terephthalic dialdoxime, isophthalic dialdoxime or an aliphatic, cycloaliphatic or aromatic ketoxime or an aromatic aldoxime of the general formula ##STR2## in the presence of 10-100 Mol % sodium, potassium or calcium hydroxide, with the sodium, potassium or calcium salt of a bis-N-chloramide of the general formulaCl-NH-CO-R-CO-NH-Clin water or a mixture of water and an aprotic solvent. Preferred first components include terephthalic dialdoxime, benzaldehyde-, cyclohexanone-, acetone- and acetophenoneoxime. Preferred aprotic solvents include dimethyl acetamide, dimethylformamide, sulfolan and tetramethylurea.

Abstract: Polyfunctional N-chloramide derivatives of homo-or copolymers of acrylamide or methacrylamide. These may be copolymers of methacrylamide and acrylamide; or of either of these with any of styrene, methylstyrene, dimethylstyrene, chlorostyrene and alkylacrylate. Preferred alkylacrylate include methyl-, methylmeth-, ethyl-, ethylmethyl-, butylmeth-, hexyl-, hexylmeth-, decyl-, decylmeth-, dodecyl- and dodecylmeth- species. The derivatives may be cross-linked by divinylbenzene or divinylether.

Abstract: A process is disclosed for making polyfunctional N-chloramide derivatives of homo--or copolymers of acrylamide or metharylamide wherein a homo--or copolymer of acrylamide or methacrylamide is chlorinated by means of chloride in a dilute aqueous suspension of a mineral acid at a temperature of 0.degree. to 40.degree. C.

Abstract: Bis-N-chloramides of saturated aliphatic dicarboxylic acids are prepared by chlorinating a saturated aliphatic dicarboxylic diamide, the aliphatic residue of which has 4 to 40 carbon atoms, in an aqueous inorganic acid medium, at a temperature between 0.degree. and 40.degree. C.; the chlorination is advantageously carried out in presence of an inorganic salt.

Abstract: A process for the preparation of 2-mercaptobenzothiazole is disclosed. The process comprises heating a reaction mixture comprising nitrosobenzene, hydrogen sulfide and carbon disulfide in a molar ratio of about 1:1.5 to 4:1 to 3, respectively, to a temperature from about 200 to about 300.degree. C., for a time sufficient to convert at least a portion of the reactants into 2-mercaptobenzothiazole. In an alternative process, there is first reacted nitrosobenzene with hydrogen sulfide in a molar ratio of about 1:1.5 to 4, at a temperature from about 20 to about 100.degree. C. for a period of time sufficient to substantially reduce the nitrosobenzene, and subsequently reacting the resulting product mixture with from about 1 to about 3 mole equivalents of carbon disulfide per mole of originally charged nitrosobenzene, at a temperature from about 200.degree. C. to about 300.degree. C.

Abstract: Mixtures hardenable under the influence of air moisture are provided. They comprise at least one organic polyisocyanate or an polyepoxide and as a moisture activated hardener an N,N'-substituted imidazolidine derivative or an N,N'-substituted hexahydropyrimidine derivative, which show at no nitrogen atom a --CO--NH-- grouping and which are present in sufficient amount to provide for cross-linking. The mixtures for example provide lacquers and adhesives having various touch dry times.

Abstract: Novel Bis-N-chloramides of aromatic dicarboxylic acids, such as alkyl-isophthalic or alkyl terephthalic acid, or of cycloaliphatic dicarboxylic acids such as cyclohexane dicarboxylic acid, are obtained by chlorinating the corresponding diamides, in an aqueous acid medium at a temperature of about 0.degree. to 40.degree. C.

Abstract: Phloroglucinol is prepared by chlorinating benzenetricarboxylic acid-(1,3,5)-triamide in an aqueous, inorganic acid medium to form benzene-tricarboxylic acid-(1,3,5)-tri-N-chloramide, which is a new compound; the latter is converted by treatment with ammonia into 1,3,5-triureido-benzene, which is hydrolyzed in inorganic acid solution to phloroglucinol.

Abstract: Phloroglucinol is prepared by chlorinating benzenetricarboxylic acid-(1,3,5)-triamide in an aqueous, inorganic acid medium to form benzene-tricarboxylic acid-(1,3,5)-tri-N-chloramide, which is a new compound; the latter is converted by treatment with ammonia into 1,3,5-triureido-benzene, which is hydrolyzed in inorganic acid solution to phloroglucinol.

Abstract: Preparation of N,N'-dichloro-terephthalamide or N,N'-dichloro-isophthalamide by chlorination of an aqueous suspension of the corresponding terephthalamide or isophthalamide under acid conditions in which the dilution of the reaction mixture is sufficient to maintain the hydrogen chloride being produced as a by-product of the chlorination substantially completely dissolved in the reaction mixture up to the end of the reaction. The compound N,N'-dichloro-terephthalamide has been discovered to be a very stable mild oxidizing agent useful as an antiseptic. Both compounds obtained by the disclosed preparation are valuable intermediate compounds.

Abstract: A two-stage process for producing para-aminobenzoic acid by first reacting certain lower alkyl or glycol monoesters of terephthalic acid or specific salts thereof or mixtures thereof with ammonia in liquid phase at elevated temperatures and pressures to obtain a terephthalic acid monoamide intermediate, removing substantially all ammonia from this intermediate and then converting it into the para-aminobenzoic acid product by the Hofmann reaction, preferably using a sodium hypochlorite solution. The para-aminobenzoic acid, either as the free acid or in the form of its salts or esters is a known product having many uses.