Abstract: Monoazo dyestuffs, free of carboxylic acid moieties or sulphonic acid moieties, of the formula ##STR1## wherein A and A' independently of one another are linear or branched alkylene having 2 to 6 carbon atoms;R is hydrogen, alkyl having 1 to 4 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, alkenyl having 3 to 5 carbon atoms, phenyl, benzyl, phenethyl, alkylcarbonyl having 1 to 4 atoms or benzoyl;m is a number from 1 to 5 and n is a number from 0 to 1.

Abstract: Water-insoluble azo dyestuffs, their manufacture and use, which have the formula ##STR1## wherein D is a substituted phenyl or heterocyclic moiety which are free from ionic substituents and R.sup.1 is methyl or ethyl.

Abstract: In a process known per se for the preparation of white patterns or patterns of various colors on a colored substrate on textile materials comprising hydrophobic synthetic fibres or on textile materials based on mixed fibres composed of polyester and cellulose comprising discharge printing wherein a discharge reserving agent based on an alkali or on sulphites, the improvement which comprises employing as the dischargeable disperse dyestuffs having the formula I ##STR1## in which R and K have the meanings given in claim 1.

Abstract: Monoazodyestuffs free from water solubilizing moieties and which are useful in dyeing and printing polyester materials, mixtures of polyesters with natural materials or cellulose triacetate materials have the formula ##STR1## wherein X.sup.1 is nitro, cyano or methylsulphonyl and R.sup.1 is of the formula ##STR2## wherein Y.sup.1 is hydrogen, methyl or ethyl; Y.sup.

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: A dyeing process has been found which enables to dye uniformly polyacrylonitrile fiber materials, by using as dyestuffs basic azo dyestuffs being non-quarternized and containing neither cationic quaternary ammonium groups nor cationic N-substituted or N-unsubstituted iminium groups, said azo dyestuffs containing on the other hand at least one unsubstituted or substituted amino group, hydrazino group, amidino group or guanidino group capable of forming salts. The very dyeing process as such is carried out according to usual processing data for dyeing polyacrylonitriles in a slightly acid medium. Especially with the use of several of these dyestuffs for polychromic dyeing, such as trichromic dyeing, special advantages are obtained, insofar that even at cut-rate dyeing periods and for preparing light color shades, there are obtained even dyes with constant color shades, when using these dyestuffs having good migrating properties.

Abstract: Process for the dyeing and printing of synthetic fibrous materials, wherein the said fibrous materials are treated with an aqueous dispersion, an aqueous padding liquor or with a solution in an organic solvent of at least one dyestuff of the formula ##STR1## in which R.sub.1 represents hydrogen, chlorine, lower alkyl or --NH--CO-lower alkyl, R.sub.2 represents hydrogen, lower alkyl or lower alkoxy, R.sub.3 represents lower alkyl, lower alkylene-OH, lower alkylene-CN, --CH.sub.2 --CBr.dbd.CH.sub.2, ##STR2## or lower alkylene-COO-lower alkyl, R.sub.4 represents hydrogen, bromine or lower alkyl, and R.sub.5 represents hydrogen, lower alkyl or phenyl, this process yielding violet to bluish-green, preferably reddish to greenish dark blue dyeings and prints of high tinctorial strength and excellent fastness properties on the said fibrous materials, such as fibers of linear polyesters, cellulose esters and polyamides.