Abstract: Water-soluble sulphur dyes can be applied to cellulose without reducing agents, without added salt and without oxidising agents if the cellulose has been grafted with a polymer obtained by polymerisation of at least one N-containing basic monomer.

Abstract: Use of water-insoluble monoazo dyestuffs of the formula I ##STR1## wherein R.sup.1 denotes alkyl having 1 to 6 C atoms, cyclopentyl, cyclohexyl, fluorine, chlorine, bromine, alkoxy having 1 to 4 C atoms or trifluoromethyl,R.sup.2 denotes alkyl having 1 to 7 C atoms andR.sup.3 and R.sup.4 independently of one another denote alkyl having 1 to 4 C atoms,for the sublimation transfer process.

Abstract: The present invention relates to hydrophilic, swellable graft copolymers composed, in random distribution, of 0.5 to 20% by weight of radicals of the general formula I ##STR1## of 79 to 99% by weight of radicals containing an acidic group, of the general formula II ##STR2## and of 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers having at least two olefinically unsaturated double bonds, and the radicals X, Z, m, n, z and also R.sup.1 to R.sup.4 are defined as given in the description, a process for the preparation of these graft copolymers and also their use as absorbents for water and aqueous solutions.

Abstract: The .beta.-modification, which is stable under dyeing conditions, of the dyestuff of the formula ##STR1## is prepared by heating the .alpha.-modification, which is unstable under dyeing conditions, at temperatures of 60.degree. to 180.degree. C. and the .beta.-modification is useful in printing and dyeing fiber materials of cellulose esters, synthetic linear polyesters or mixed fabrics of the polyester fiber material with wool or viscose staple.

Abstract: The present invention relates to hydrophilic, swellable graft copolymers composed, in random distribution, of 0.5 to 20% by weight of radicals of the general formula I ##STR1## 79 to 99% by weight of radicals containing an acidic group, of the general formula II ##STR2## and 0.1 to 2% by weight of crosslinking structures which are derived from monomers having at least two olefinically unsaturated double bonds, where the radicals X, Y, R.sup.1 to R.sup.4 and n have the meanings given in claim 1, and which are used as absorbents for water and aqueous solutions.

Abstract: A valuable starting material for the manufacture of tetrachlorothioindigo pigments is 2,5-dichlorophenylthioglycollic acid which is prepared by:(a) diazotizing 2,5-dichloroaniline with aqueous alkali metal nitrite at acidic pH to produce 2,5-dichlorophenyl-diazonium salt,(b) reacting the 2,5-dichlorophenyl-diazonium salt from (a) with thiourea in an aqueous medium at acidic pH in the presence of a catalyst to produce 2,5-dichlorophenyl-isothiuronium salt of the formula ##STR1## wherein X.sup..crclbar. is an anion of a mineral acid, (c) hydroloyzing the 2,5-dichlorophenylisothiuronium salt from (b), without intermediate isolation, at alkaline pH to produce 2,5-dichlorothiophenol and(d) condensing the 2,5-dichlorothiophenol with monochloroacetic acid to produce 2,5-dichlorophenylthioglycollic acid.

Abstract: Physiologically-acceptable 3-aminosydnonimines 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 formulation for brightening synthetic fibers or mixtures of synthetic fibers and natural fibers, which is an aqueous dispersion comprising at least one finely divided optical brightener and a dispersing agent, wherein the improvement comprises the dispersing agent being a water-soluble or water-dispersible polyester containing at least one phosphonic acid ester moiety.