Abstract: 4-Isopropyl-4'-nitrobenzophenone and other benzophenones of the formula ##STR1## wherein R is hydrogen, alkyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, alkyl having 2 to 20 carbon atoms interrupted by oxygen, or alkoxy having 2 to 20 carbon atoms interrupted by oxygen, are prepared by reacting a substituted benzene compound of the formula ##STR2## with p-nitrobenzoyl halide at temperatures of 10.degree. to 140.degree. C. in the presence of a Friedel-Crafts catalyst and an inert solvent which is an aliphatic hydrocarbon, a chlorinated aliphatic hydrocarbon or chlorinated aromatic hydrocarbon.

Abstract: Azo dyestuffs free from groups imparting solubility in water are used in the process for the production of white or variously colored designs on a colored substrate on textile materials containing hydrophobic, synthetic fibers by impregnating the materials with dye liquors containing dyeing auxiliaries and padding auxiliaries as well as dyestuffs which are dischargeable to white, drying or incipiently drying the impregnated materials, printing the materials with an alkaline discharge reserve paste which contains a discharging agent, and subsequently subjecting the materials to a heat treatment at temperatures from 100.degree. to 230.degree. C., wherein said discharging agent is a base which produces a pH value of at least 8 in a 5% strength aqueous solution and the dyestuffs which are dischargeable to white are of the formulaD--N.dbd.N--K--NHSO.sub.

Abstract: New sulphur dyestuffs are prepared by reacting sulphur with a 4-hydroxydiphenylamine of the formula ##STR1## wherein R and R.sup.1 denote hydrogen or alkyl having 1 to 4 carbon atoms and the nucleus A has at least one free ortho-position in relation to the imino group, in a first stage at an elevated temperature to form a thiazine compound which is then sulphurized in a second stage in a water-soluble solvent at an elevated temperature to produce the sulphur dyestuff, and wherein a molar ratio of first stage reactants of 1:(2 to 2.4) between the 4-hydroxydiphenylamine compound and sulphur is maintained.

Abstract: An improved process for preparation of arylisocyanide dichloride by chlorinating N-arylformamide in the presence of thionyl chloride wherein the improvement comprises preparing the N-arylformamide by formylation of an arylamine having 6 to 12 aryl carbon atoms with a formylating agent in an inert solvent.removing excess formylating agent and by-products of the formylation thereby leaving the N-arylformamide in the form of a solution or suspension in the inert solvent and chlorinating the N-arylformamide in solution or suspension with a chlorinating agent in the presence of thionyl chloride.

Abstract: In the process for production of discharge reserve prints on textile material comprised of water-repellent fibers or water repellent fibers mixed with cellulose fibers, wherein a disperse dyestuff which is dischargeable to white is applied in the form of a dye liquor or printing paste to the textile material after which said material is dried or incipiently dried, and a discharge reserve printing paste is printed on the material in the desired pattern, and the thus treated material is subsequently subjected to a heat treatment at temperatures of 100.degree. to 230.degree. C., the improvement comprises said disperse dyestuff which is dischargeable to white is a dyestuff of the formula ##STR1## as more fully defined herein and wherein said discharge reserve printing paste contains, as the discharging agent, a base which produces a pH value of at least 8 in a 5% strength aqueous solution.

Abstract: An improved process for producing discharge reserve prints on textile materials comprising water-repellent fibers or mixed water-repellent and cellulose fibers wherein a disperse dyestuff which is dischargeable to white is applied to the textile material in the form of a dye liquor or dye printing paste, at least partially drying the textile material, applying a discharge reserve printing paste to the material by printing on the material in the desired pattern and subsequently heating the printed material at temperatures from 100.degree. to 230.degree. C., with the improvement comprising (a) the discharge reserve printing paste containing, as the discharging agent, an alkaline material which produces a pH value of at least 8 in 5% strength aqueous solution and (b) the disperse dyestuff which is dischargeable to white is a disperse dyestuff of the formula ##STR1## as more fully defined herein.

Abstract: An azo dyestuff of the formula ##STR1## wherein R is linear alkyl having 2 to 4 carbon atoms and R' is linear alkyl having 3 to 5 carbon atoms and isopropyl.

Abstract: Low viscosity, aqueous impregnating resin solution with improved stability containing 30-70% by weight of solid resin which comprises:(A) 80-98% by weight of a melamine-formaldehyde precondensate and(B) 2-20% by weight of a water soluble copolymer.

Abstract: A dyestuff useful for dyeing and printing synthetic, hydrophobic fibers or mixtures thereof with cellulose fibers and stable under dyeing conditions is a .beta.-modification of a compound of the formula ##STR1## having an X-ray diffraction pattern under Cu-K.alpha.-radiation with high intensity lines at a diffraction angle in .theta. degrees of 3.75, 6.40 and 12.35;medium intensity lines at a diffraction angle in .theta. degrees of 6.60, 7.30, 7.60, 7.90, 8.10, 8.35, 9.30, 9.70, 9.90, 10.20, 10.50, 12.70 and 13.90;and low intensity lines at a diffraction angle in .theta. degrees of 5.65, 8.75, 11.25, 11.70, 13.35, 15.10 and 15.55; which is prepared by heating at 50.degree.-150.degree. C. the .alpha.-modification of said compound, which is unstable under dyeing conditions.

Abstract: Carbazoleazomethines are prepared and sulfur dyestuffs are prepared by sulphurizing a carbazoleazomethine of the formula ##STR1## wherein R.sup.1 is hydrogen, hydroxyl, halogen, nitro, alkyl having 1 to 8 carbon atoms, alkoxy having 1 to 8 carbon atoms, dialkylamino having 1 to 4 carbon atoms per alkyl, alkanoyloxy having 1 to 8 carbon atoms, benzoyloxy, alkanoylamino having 1 to 8 carbon atoms or benzoylamino;R.sup.2 is hydrogen, hydroxyl, halogen, alkyl having 1 to 8 carbon atoms or alkoxy having 1 to 8 carbon atoms;R.sup.3 is hydrogen or alkyl having 1 to 7 carbon atoms;R.sup.4 is hydrogen or halogen; andR.sup.5 is hydrogen or alkyl having 1 to 8 carbon atoms.

Abstract: Outstandingly suitable drilling mud additives are water soluble copolymers consisting essentially of a random distribution of(a) 5 to 95% by weight of units of the formula ##STR1## (b) 5 to 95% by weight of units of the formula ##STR2## and (c) 0 to 80% by weight of units of the formula ##STR3## wherein R.sup.1 and R.sup.2 are the same or different and each is hydrogen methyl or ethyl; andX.sup..sym. is a cation.

Abstract: Pharmacologically-valuable 3,4-(bis-substituted)-1,2,5-oxdiazole 2-oxides of formula I ##STR1## [wherein R denotes --NHR.sup.1, --NR.sup.2 R.sup.3, --NHR.sup.4 OR.sup.2, --NHR.sup.5 COR.sup.6 or ##STR2## R.sup.1 denotes alkyl having from 1 to 6 C atoms or cycloalkyl having 4 to 7 ring C atoms, R.sup.2 and R.sup.3 denote alkyl having from 1 to 4 C atoms, R.sup.4 denotes an alkylene radical of the formula --C.sub.n H.sub.2n --(wherein n denotes 2, 3 or 4), R.sup.5 denotes an alkylene radical of the formula --C.sub.m H.sub.2m -- (wherein m denotes 1, 2 or 3), R.sup.6 denotes --OR.sup.2, --NHR.sup.1, --NR.sup.2 R.sup.3 or --NH.sub.2, X denotes --(CH.sub.2).sub.p --, --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 -- or ##STR3## and p is 4, 5 of 6] and their pharmacologically-acceptable acid-addition compounds are prepared by elimination of hydrogen chloride from a hydroxamoyl chloride of the formulaR--CO--C(Cl).dbd.NOH (II)and dimerization.

Abstract: Improved textile materials are produced having white or variously colored designs on a colored substrate on textile materials containing hydrophobic, synthetic fibers by impregnating the materials with dye liquors containing dyeing and padding auxiliaries as well as dyestuffs dischargeable to white, drying or incipiently drying the impregnated materials and then printing a desired pattern onto the materials with a discharge reserve paste containing a discharging agent, and subsequently subjecting the materials to a heat treatment at temperatures from 100.degree. to 230.degree. C., the improvement comprises the dyestuffs dischargeable to white being dyestuffs of the formula ##STR1## wherein n is a number from 1 to 9; and said discharging agent being a base which produces a pH value of at least 8 in a 5% strength aqueous solution.

Abstract: The aqueous dyestuff formulation of an tetrakisazo direct dyestuff which is stable to alkali and contains at least one aromatic hydroxyl group and/or enol group and at least one group conferring solubility in water, or a mixture of such azo direct dyestuffs, is characterized in that it has a pH value equal to or greater than 12 and is prepared by mixing an azo direct dyestuff which is stable to alkali, water and a tertiary alkali metal phosphate and/or alkali metal metasilicate and/or alkali metal hydroxide, and by choosing the proportions such that the dyestuff formulation contains 5 to 50% by weight of dyestuff and has a pH value equal to or greater than 12. The dyestuff formulation is used, after dilution with water, for dyeing and printing natural or synthetic materials containing hydroxyl groups.

Abstract: In the process for the manufacture of the organic pigment of the formula ##STR1## by condensing and cyclizing 3-amino-9-ethylcarbazole with excess tetrachlorobenzoquinone in an organic solvent in the presence of acid acceptors, the improvement comprises carrying out the condensation reaction in the presence of 0.1 to 4% of water, relative to the total weight of the reaction mixture.

Abstract: The process for manufacture of an N-hydroxyalkylcarbazole of the formula ##STR1## wherein R is H, CH.sub.3 or C.sub.2 H.sub.5 and n is a number from 0 to 4 which comprises reacting carbazole with an epoxide of the formula ##STR2## or a chlorohydrin of the formula ##STR3## at temperatures from 20.degree. to 150.degree. C. in the presence of a base and a phase transfer catalyst, in an organic solvent which is immiscible with water.

Abstract: A 1-acyl-8-[2,3-epoxypropoxy]- and/or 1-acyl-8-[3-halo-2-hydroxypropoxy]-1,2,3,4-tetrahydroquinoline are reacted with primary and secondary amines to obtain corresponding physiologically-active 1-acyl-8-[3-amino-2-hydroxypropoxy]-1,2,3,4-tetrahydroquinolines and pharmacologically-acceptable acid-addition salts thereof. These compounds are useful as such or in conventional medicament compositions for treating those afflicted with heart ailments and/or hypertension.

Abstract: Physiologically-acceptable 3-aminosyndnonimines of the formula ##STR1## and their pharmacologically-acceptable acid-addition salts, when formulated into medicament dosage forms, are useful for reducing systemic blood pressure, pulmonary artery pressure and left ventricular end diastolic pressure when orally administered to patients in need of such pressure reduction. These compounds are prepared by cyclizing a compound which, in its free-base state, is of the formula ##STR2## to a corresponding product which, in its free-base state, is of the formula ##STR3## and, when R.sup.2 is other than --H, acylating that product.

Abstract: The process of reducing 2,4-dinitrophenol to 2-amino-4-nitrophenol by reduction with a hydrosulfide in aqueous alkaline solution at temperatures from 20.degree.-100.degree. C. is improved by maintaining the pH at 7 to 9.5 during the reduction.

Abstract: A melamine-formaldehyde resin useful for making coated wood-based materials and laminates and having a prolonged pot life comprises (a) melamine-formaldehyde precondensation product wherein the molar ratio of melamine:formaldehyde is 1:1.4 to 1:2.6 (b) 0.1 to 1.0% by weight based on total solids, of an amine of the formula ##STR1## wherein R.sup.1 and R.sup.2 are each identical or different alkyl having 1 to 4 carbon atoms and R.sup.3 is 2-hydroxyethyl, 2-(2-hydroxyethoxy)-ethyl, 3-hydroxy-1-propyl, 3-hydroxy-2-propyl, 2,3-dihydroxypropyl or--CH.sub.2 CH.sub.2 --NR.sup.1 R.sup.2,wherein said amine may be present entirely or partially in the form of its reaction product with the melamine-formaldehyde pre-condensation product.