Abstract: Aqueous ammonium thiocyanate solutions are prepared continuously by reaction of ammonia with carbon disulfide in the presence of water using activated carbon as catalyst at pressures of from 2 to 7 bar. In this way, a very pure product can be obtained. The process can be carried out at very low cost, because both the addition of ammonia to carbon disulfide and the decomposition of the resulting ammonium dithiocarbamate can be carried out in a reactor in one step under identical conditions.

Abstract: A process for the preparation of aromatic N,N'-disubstituted guanidines is described in which the corresponding aromatic N,N'-disubstituted thioureas are reacted with ammonia and oxygen or with an oxygen-containing gas, in the presence of a solvent and elements acting as catalysts having atomic numbers 21 through 30 in the Periodic Table or the lanthanides or the salts, oxides or complexes thereof.

Abstract: This invention relates to a process for the production of benzothiazolyl sulphenamides corresponding to the following general formula: ##STR1## in which a corresponding 2-mercaptobenzothiazole or a dibenzothiazolyl-2,2'-disulphide is reacted with a primary or secondary amine at temperatures of from 0 to 100.degree. C. in the presence of ammonia, oxygen, a copper-containing catalyst and a reaction medium containing an excess of the primary or secondary amine or of a mixture of that amine with water and/or a water-miscible organic solvent.Benzothiazolyl sulphenamides are valuable vulcanization accelerators.

Abstract: A laminate comprising an insoluble, intractable relatively thick layer of a polyimide bonded tightly onto a metallic substrate without the necessity for an intermediate adhesive bonding layer and a process for preparing such by directly extruding a polyamic acid polyimide-precursor onto said substrate and converting said polyamic acid to the polyimide in a single pass in at least two heating stages.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: Water-containing water glass fibers are disclosed, substantially free from non-alkaline compounds and having a water content of from about 15 to 30% by weight, a tear strength of from about 5 to 30 cN/tex, a ratio of alkaline oxide to silicon dioxide of from about 1:3 to 1:1.9, an amorphous structure and a density of from about 2 g/cm.sub.3 to 2.5 g/cm.sup.3. The fibers are preferably cut into lengths of from 1 to 40 mm. They may be used for subsequent production of silica fibers, a technique more advantageous than producing the latter from a melt containing SiO.sub.2 or by acid-leaching of glass fibers. The silica fibers are useful for producing wet webs, filter linings and reinforcing material.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans-cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: Thermoplastically workable polyurethane-elastomers are disclosed which are obtained through polyaddition of substantially pure trans-cyclohexane-1,4-diisocyanate, macrodiols of average molecular weight from 800 to 4000 and bisethoxylated Bisphenol A or mixtures thereof with short-chain diols customarily employed as chain lengtheners. The polyurethanes possess the advantage that their softening points lie in a very favorable temperature range which makes possible their thermoplastic workability at below the decomposition temperature, and also guarantees outstanding mechanical-elastic characteristics as well as excellent long-term light stability. As a result the polyurethanes according to the present invention are outstandingly suitable as material for shaped bodies to be employed in areas of use placing high requirements on the employed materials. For example, highly valuable elastomer fibers can be manufactured from these polyurethanes by means of melt spinning.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a transcyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: Process for the production of silica fibers of the type in which alkali water glass is dry spun into water-containing alkali silicate fibers which are then contacted with solutions containing hydrogen ions for transforming into silica fibers, the improvement being dry-spinning glass free from non-alkaline compounds having a molar ratio of alkaline oxide to silic dry dioxide of from about 1:3 to 1:1.9 and a viscosity of about 10-700 Pa measured at 30.degree. C., at 10.degree.-50.degree. C. in a drying funnel of a temperature of more than 100.degree. C., at a discharge velocity of minimum 5 m/min.

Abstract: Process for the production of water containing water glass fibers of the type in which alkali water glass is dry spun into water containing fibers, the improvement being dry-spinning water glass free from non-alkaline compounds having a molar ratio of alkaline oxide to silicon dioxide of from about 1:3 to 1:1.9 and a viscosity of about 10-700 Pa measured at 30.degree. C., at 10.degree.-50.degree. C. in a drying funnel of a temperature of more than 100.degree. C., at a discharge velocity of minimum 5m/min.

Abstract: An improved process for the preparation of nitrosobenzene by catalytically reducing nitrobenzene is disclosed. The improvement comprises performing the reduction in the absence of a reducing agent.

Abstract: An improved process for the preparation of nitrosobenzene by catalytically reducing nitrobenzene with the use of a reducing agent selected from the group consisting of aliphatic compounds containing from about 1 to about 20 carbon atoms, cycloaliphatic compounds containing from about 4 to about 12 carbon atoms, benzene, naphthalene, and ethylenically unsaturated compounds containing from about 2 to about 10 carbon atoms is disclosed. The improvement comprises performing the reduction in the presence of from about 0.05 to about 4.0 moles of water per mole of nitrobenzene.

Abstract: This disclosure relates to a novel process for preparing a class of dithiazolyl-(2,2')-disulfides by the catalytic oxidation of 2-mercaptothiazoles. In particular the present invention involves a process for preparing dibenzothiazyl-disulfides upon the oxidation of a 2-mercaptobenzothiazole in the presence of a tertiary amine.

Abstract: This invention relates to a polyfunctional isocyanate which is an acrylamide or methacrylamide homopolymer or interpolymer having 20 to 100% of its secondary .alpha. and tertiary .alpha. carbon atom amide groups converted to isocyanate groups, said polyfunctional isocyanate being free of alkali and urea groups.The polyfunctional isocyanates are prepared by reacting the N-chloramide derivative of the acrylamide or methacrylamide polymer, in an inert solvent, with a tertiary amine having a pK.sub.a value of more than 7.The polyfunctional isocyanates are useful for forming coating compositions.

Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.

Abstract: Polyurethanes prepared from macrodiols with an average molecular weight between about 800 and 4000, lower molecular weight chain extenders with at least two labile hydrogens, and cyclohexane-1,4-diisocyanate with a trans-isomer content of at least 90%, are described. These polyurethanes exhibit exceptional mechanical properties, high softening temperatures, and remarkable stability to light and to many common solvents.Methods for preparation of the novel polyurethanes, as well as for their use, are also disclosed.

Abstract: A process for the preparation of derivatives of aliphatic, cycloaliphatic, and araliphatic compounds containing from 1 to 3 isocyanate groups bonded to from 1 to 3 secondary or tertiary carbon atoms, or a combination thereof, is disclosed. The process comprises reacting a compound of the formula R--(CO--NHCl).sub.n, wherein R represents an aliphatic, cycloaliphatic, or araliphatic radical, with a tertiary amine having a pK.sub.a greater than 7, at a temperature from about 20.degree. to about 180.degree. C., in an inert solvent, to form a compound of the formula R--(N.dbd.C.dbd.O).sub.n, wherein the isocyanate groups are bonded to secondary or tertiary carbon atoms.