Abstract: The present invention relates to a dye of formula (I) where R1, R2, X, Y and t are each as defined in claim 1, to its preparation and to its use.

Abstract: The present invention relates to the dyestuff of the formula I ##STR1## modifications of this dyestuff which are stable during dyeing, processes for the preparation thereof and their use for dyeing and printing synthetic fiber materials.

Abstract: The present invention relates to polycondensates of the general formula I ##STR1## in which X stands, at least once, for a group of the formula VII ##STR2## and, at least once, a group of the formula VIII ##STR3## and the other variables are defined as indicated in claim 1, processes for their preparation and their use.

Abstract: The present invention relates to polycondensates of the general formula I ##STR1## in which ##STR2## and the other variables are defined as indicated in claim 1, processes for their preparation and their use.

Abstract: Process for dyeing and printing blended fabrics made from polyester and natural fibre materials, characterized in that the dye baths, padding liquors or printing pastes contain compounds of general formula (I). Dye preparations containing one or more compounds of general formula (I).

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: Disclosed is a nonwoven, textile sponge for use in medical and hygienic applications consisting of at least one outer, thermally consolidated, moisture-repellent fiber layer containing at least 80% synthetic heterofil filaments and at least one layer of absorbent fibers. The sponge is perforated, but does not have any substantial fiber entanglement, and contains no binding agent of any kind. Also disclosed is a method for the manufacture of the sponge, in which the fiber nonwovens are laid one on the other, hydraulically perforated without fiber entanglement, and then thermally consolidated through heterofil filaments.

Abstract: There are produced 2-isocyanato-2,3-dehydrocarboxylic acid esters of the general formula: ##STR1## in which R.sup.1 is a straight chain or branched C.sub.1 -C.sub.4 -alkyl group, a phenyl group or a benzyl group, R.sup.2 is hydrogen or a methyl group and R.sup.3 is hydrogen, a straight chain or branched C.sub.1 -C.sub.16 -alkyl group, a C.sub.3 -C.sub.8 -cycloalkyl group, a C.sub.1 -C.sub.6 -alkylmercapto group or a phenyl group by reacting a 2-azido-carboxylic acid ester of the general formula: ##STR2## in an inert solvent at a temperature between 0.degree. and 150.degree. C. with phosgene or diphosgene in the presence of a perrhenate. The compounds of general formula (I) can be converted into the corresponding Z- or BOC-protected 2,3-dehydro-2-amino-carboxylic acid ester with benzyl alcohol or with tert. butyl alcohol, which esters in turn are valuable building blocks for the synthesis of dehydropeptides.