Abstract: Isocyanates are prepared by a continuous process by reacting appropriate primary amines with phosgene in the presence of an isocyanate as solvent, the primary amine optionally dissolved in an inert organic solvent being reacted with phosgene, which is dissolved in the isocyanate, at temperatures of 60 to 150.degree. C. and at pressures of 1 to 30 bar (10.sup.5 to 3.10.sup.6 Pa) to obtain the corresponding isocyanate, wherein the molar ratio of phosgene to amine used is 4:1 to 1:1, and the isocyanate used as solvent is solids-free and has a value for hydrolysable chlorine of less than 2%.

Abstract: Ether-linked amine-terminated polyesters are produced by reacting (1) a polyester polyol in which substantially all of the hydroxyl groups have been replaced with good leaving groups with (2) an aminoalcohol and/or aminothiol and (3) a deprotonating agent. The aminopolyesters obtained by this process are characterized by excellent reactivities over a wide range of molecular weights and functionalities.

Abstract: A continuous process for the preparation of isomeric mixtures of dinitrotoluene by a single stage nitration of toluene under adiabatic conditions. The reaction enthalpy is used for the removal by distillation of the water of reaction formed during nitration. In this process, toluene is reacted with a nitrating acid having from about 80 to about 100% by weight of an inorganic component having a specified composition and from about 0 to about 20% by weight of an organic component having a specified composition.

Abstract: The invention relates to pyrazolooxazines, pyrazolothiazines and pyrazoloquinolines defined herein by Formula I. The invention also includes compositions containing said Formula I compounds and methods for the use of said compounds and compositions for their lipoxygenase-inhibiting properties. Also included in the invention are methods for the manufacture of said compounds of Formula I.

Abstract: A process for the preparation of N,O-disubstituted urethanes. Urea or polyurets, primary amines and alcohols are reacted at 120.degree.-350.degree. C. in the presence of N-substituted urethanes and/or N-mono- or N,N'-disubstituted ureas or polyureas. In a preferred embodiment, the reactants further include catalysts known to be useful in esterification of carboxylic acids. The urethanes produced in accordance with this process are particularly useful as starting materials for preparation of isocyanates.

Abstract: Polyisocyanates are prepared by thermally splitting a carbamate corresponding to the formula:R.sup.1 (NH--CO--O--R.sup.2).sub.nin which R.sup.1, R.sup.2 and n are as defined herein into the corresponding isocyanate and alcohol. The splitting reaction is carried out at a temperature of from 150.degree. to 350.degree. C., at a pressure of from 0.001 to 20 bar and in the presence of an auxiliary agent. Suitable auxiliary agents are hydrogen chloride, organic acid chlorides, compounds having an alkylating effect and organotin (IV) chlorides. Inert solvents and catalysts may also be employed in the splitting products. The thus-produced isocyanate and alcohol are then separated, if necessary.

Abstract: The present invention relates to novel, substantially insoluble and infusible plastics which are cross-linked by way of triazine rings and, optionally, by way of tri-substituted bis-oxymethylene urea groups or urethane groups.

Abstract: The instant invention is directed to storage stable liquid, partially carbodiimidized methylenebis(phenyl isocyanate) and to the method of manufacture thereof. The products of the instant invention are produced by heating methylenebis(phenyl isocyanate) at a temperature of from 150.degree. to 300.degree. C. in the presence of from 1 ppb to 10 ppm of a phospholine oxide catalyst. The reaction mixture is then cooled once the desired isocyanate content has been reached. The resultant product can be used to produce a variety of isocyanate-addition reaction products, including polyurethanes, polyureas and the like.

Abstract: Tris-(2-hydroxyaryl) esters of cyanuric acid, useful as cross-linking agents and UV absorbers, of the formula ##STR1## WHEREIN ##STR2## IS AN AROMATIC RADICAL WITH A HYDROXYL GROUP IN THE 2-POSITION TO THE ETHER OXYGEN,R is alkyl, phenyl, halogen, nitro, hydroxyl, alkoxy or phenoxy, andN is 0 or 1 or is 2, 3 or 4 in which case one R has the above-defined meaning and the or each further radical R is alkyl, the radicals R optionally being different.

Abstract: A polytrimerizable mixture of30 to 99.9% by weight of at least one aromatic, polyfunctional cyanic acid ester or a prepolymer thereof, and0.1 to 70% by weight of at least one high-boiling ester with a boiling point above 250.degree. C at 760 Torr,Said mixture results in polytriazines having a significant improvement in elasticity, flexibility and resistance to hydrolysis.

Abstract: Non-inflammable, high molecular weight polytriazines are obtained by condensing less than 3 mols of polyfunctional (amino)phenols with 1 mol phosphorus (oxy) trihalide in the presence of a base, subsequently reacting the still free primary amino or phenolic hydroxyl groups with cyanogen halide in the presence of a base to form cyanamide or organic ester groups and polymerizing thereafter the reaction product at a temperature of up to 350.degree. C, optionally in the presence of polymerization promoters. The polytriazine may be used as plastics and lacquers.

Abstract: High molecular weight temperature-resistant polymers of polytriazine structure obtained by heating cyanamides of the formula Ir -- (nh-cn).sub.nin which R represents an aliphatic, cycloaliphatic, heterocyclic or aromatic radical, optionally interrupted by oxygen and n is a number from 2 to 5, with polyfunctional, aromatic cyanic acid esters into a fusible or in organic solvents soluble polymeric N-cyano-isourea ether and completing the reaction at elevated temperatures and optionally in the presence of a catalyst to form said polymer of polytriazine structure.

Abstract: Aromatic cyanic acid esters having a free hydroxyl group which is not sterically hindered are prepared by reacting aromatic dihydroxy and polyhydroxy compounds with cyanogen halide in aqueous solution in the presence of a water-immiscible organic solvent and an inorganic base. Aromatic cyanic acid esters prepared by the process have the formula ##STR1## wherein Ar is optionally substituted aromatic and n and m are the same or different and are one of the numbers from 1 to 5, with the sum m and n being not greater than the number of replaceable hydrogen atoms in the radical Ar.

Abstract: Polyfunctional aminophenols or amino(alkyl)phenols are converted with cyano halide in the presence of a base at temperatures below 65.degree. C into the corresponding aromatic cyanic acid esters containing cyanamide groups and thereafter at 65.degree. C to 150.degree. C into prepolymers which are soluble in organic solvents and highly stable in storage. The prepolymers may be converted into high molecular weight polymers of triazine structure by heating to 150.degree. C to 350.degree. C. The end products are insoluble in solvents and are infusible. The prepolymers may be used for the production coatings, shaped articles or laminates.

Abstract: Process for the preparation of s-triazine prepolymers which comprisesA. condensing a hydroxy compound which has 2 or more alcoholic hydroxyl groups;B. condensing the resulting condensation product with an aromatic hydroxy compound; andC. thereafter reacting the free hydroxyl groups of the condensation product obtained from (b) with cyanogen halide and in the presence of a base.

Abstract: Highly pure aromatic polyfunctional cyanic acid esters having a high stability in storage and being extraordinary suitable for use as starting compound for the production of plastics by cyclopoly-trimerization are obtained by a special process. Alkaline earth and/or alkali metal salts of polyfunctional aromatic hydroxy compounds said alkaline earth and/or alkali metal compound capable of phenolate formation are used in excess of up to 0.1 mol per mol of aromatic hydroxy group are reacted with an excess of cyanogen halide. The cyanogen halide excess comprises up to 1 mol per mol of aromatic hydroxy group plus excess mol of the metal compound used for salt production.

Abstract: S-Triazine prepolymers with aromatic cyanate groups are obtained by condensation of aromatic di- or polyhydroxy compounds with 0.01 to 0.5 mol of 4,6-dichloro-s-triazine per one hydroxy group. Subsequently the condensation products are reacted with cyanogen halide in the presence of a base. s-Triazine prepolymers may be polymerized to form hard plastics with resistance to high temperature.

Abstract: Nitroderivates of aromatic compounds which are difficult to nitrate, can readily be obtained by nitration providing that the aromatic compound is treated with nitric acid or another nitrating agent in the presence of aliphatic or cycloaliphatic hydrocarbons monosubstituted or polysubstituted by halogen, the nitro group or an alkyl sulphonyl group, and the nitro derivative formed subsequently isolated.

Abstract: Mixtures of aliphatic, cycloaliphatic or aromatic polyfunctional N-cyanosulfon amides and aromatic polyfunctional cyanic acid ester are converted at 30.degree. to 150.degree. C into fusible prepolymers or prepolymers soluble in organic solvents (polymeric N-organo-isourea ethers). Said prepolymers are highly stable in storage and react at 150.degree. - 350.degree. C to high molecular weight polymers of of triazine structure which are insoluble in solvents and infusible. The prepolymers may be used for the production of coatings or shaped articles or laminates.

Abstract: Highly pure aromatic polyfunctional cyanic acid esters having a high stability in storage and being extraordinarily suitable for use as starting compound for the production of plastics by cyclopoly-tri-merization are obtained by a special process.A di- or polytrialkyl ammonium phenolate of the formula: ##STR1## in which Ar represents an optionally substituted aromatic radical,R.sub.1, r.sub.2 and R.sub.3 are the same or different and each represents a linear or branched alkyl radical, andn is a number from 2 to 6,Is reacted at a temperature in the range of from -40.degree. to +65.degree. C in the presence of a trialkyl amine and an organic solvent with an excess of cyanogen halide.The excess of cyanogen halide is up to 80% by weight, based on the total weight of the phenolate and the trialkyl amine.