Abstract: Compounds of the formula ##STR1## wherein A represents N or C-Cl,and, in the case where A.dbd.N, their quaternization products of the formula ##STR2## in which R represents an alkyl, cycloalkyl or aralkyl radical andX denotes an inorganic or organic acid radical, and it being possible, in the formulae I and II, for the cyclic and acyclic radicals to carry non-chromophoric substituents customary for whiteners,are suitable for the whitening of organic materials, as scintillators and laser dyestuffs.

Abstract: Stable concentrated solutions of basic dyestuffs of the formula ##STR1## wherein R denotes the remaining part of a 5- or 6-membered heterocyclic ring,R.sub.1 denotes optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl,R.sub.3 denotes alkyl andA denotes an aromatic or heterocyclic radicalare prepared by reacting bases of the formula ##STR2## with dialkyl sulphates of the formula(R.sub.3 -O-).sub.2 SO.sub.2in organic solvents which are completely or partially miscible with water and which do not react with the dialkyl sulphates or react with these more slowly than the dye bases.

Abstract: A pressure-sensitive and heat-sensitive recording material contains color-forming agents of the formula ##STR1## wherein R.sub.1 denotes hydrogen or a non-ionic radical which is free from amino groups,R.sub.2 denotes hydroxyl, alkylamino, dialkylamino, acylamino, aralkylamino, arylamino, a saturated heterocyclic radical, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy or a direct bond to R.sub.4,R.sub.3 denotes hydroxyl, alkoxy, aralkoxy, alkenyloxy, cycloalkoxy, aryloxy, alkylthio, arylthio or a radical of the formula ##STR2## wherein R.sub.5 and R.sub.6 independently of one another denote hydrogen, alkyl, aralkyl, cyloalkyl or aryl or, together with the nitrogen atom, form a ring, or R.sub.5 forms a ring with the ring B in the o-position relative to the nitrogen atom, andR.sub.4 denotes an aryl radical which is free from amino groups or a heterocyclic radical.

Abstract: Dyestuffs of the formula ##STR1## IN WHICH R denotes hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl, alkoxy, aralkoxy, aryloxy, alkylamino, aralkylamino, arylamino, acylamino, carboxylic acid ester, carbonamido, acyl, halogen or nitrile,R.sub.1 denotes hydrogen, alkyl or aralkyl,R.sub.2 denotes hydrogen, alkyl, alkenyl, carbonamide or nitrile,R.sub.3 denotes alkyl, alkenyl or aralkyl,R.sub.4 denotes hydrogen, alkyl, alkenyl, aralkyl, alkoxy or aralkoxy, alkylamino, aralkylamino, acylamino, carbonamido, nitrile, nitro or halogen,R.sub.5 and R.sub.6 denote hydrogen, alkyl, aralkyl or a cycloaliphatic 5-membered or 6-membered ring, or R.sub.6 together with R.sub.1 forms a hydroaromatic 6-membered ring andAn.sup.(-) represents an anion, andProcesses for their preparation and their use for dyeing and printing natural and synthetic materials.

Abstract: Triaryl-methane dyestuffs which are free from sulfonic acid and carboxylic acid groups and are selected from the group consisting of dyestuffs having one of the following four formulae: ##STR1## wherein R is alkyl, aralkyl, cycloalkyl or aryl; R.sub.1 is hydrogen, alkyl, aralkyl or cycloalkyl; R.sub.2 is alkyl, aralkyl, cycloalkyl or aryl; R.sub.1 and R.sub.2 additionally including divalent alkylene when joined together with the nitrogen or with a carbon atom in the o-position in the ring A to form a heterocyclic ring; R.sub.3 is hydrogen, alkyl, aralkyl, aryl, aralkoxy, aryloxy, halogen, carboxylic acid ester radical, carbonamido, sulfonamido, cyano, nitro, alkylsulfonyl, aryalkylsulfonyl, arylsulfonyl or acyl; and X is the radical of an anion; ##STR2## wherein R is alkyl or cycloalkyl; R.sub.1 is hydrogen, alkyl, aralkyl, cycloalkyl or aryl; R.sub.2 is alkyl, cycloalkyl, aralkyl or aryl, halogen or cyano; R.sub.1 and R.sub.

Abstract: Dyestuffs of the formula ##STR1## WHEREIN R.sub.1 is a straight-chain alkyl, alkenyl, or alkinyl of 3-6 carbon atoms or aralkyl; R.sub.2 is aryl; R.sub.3 is hydrogen, straight-chain alkyl of 1-6 carbon atoms, straight-chain alkenyl or alkinyl of 3-6 carbon atoms or aralkyl; An is an anion; and the cyclic and acyclic radicals can be further substituted by non-ionic substituents. These dyestuffs are suitable for dyeing and printing of natural and synthetic materials, particularly of polyacrylonitrile, copolymers of acrylonitrile with other vinyl compounds, of acid modified polyesters and acid modified polyamides.

Abstract: A dye laser employing a solution of: ##STR1## wherein R and R.sub.1 independently of one another represent hydrogen, alkyl, cycloalkyl or aralkyl or can form, with R.sub.2 or R.sub.3, or with R.sub.4 or R.sub.5, a partially hydrogenated 5-membered or 6-membered heterocyclic ring, R.sub.2 - R.sub.5 independently of one another represent hydrogen, alkyl, alkoxy or halogen or can form, with R or R.sub.1, a partially hydrogenated 5-membered or 6-membered heterocyclic ring,Me represents hydrogen, a monovalent or divalent metal cation, or the ammonium, monoalkylammonium, dialkylammonium or trialkylammonium radical, and m and n denote a number between 1 and 4,And whereinThe rings, A, B and C as well as the aliphatic or aromatic radicals present in the formula can also be substituted further,In a concentration which emits laser beams, preferably of 10.sup.-2 to 10.sup.-5 mol litre.

Abstract: Polyaminopolyarylmethanes and a monoarylamine are heated in water in the presence of a solid acid catalyst insoluble in the reaction mixture to convert the polyarylaminopolyarylmethanes into diaminodiarylmethanes.

Abstract: Polyaminopolyarylmethanes and an aromatic monoamine unsubstituted in an ortho or a para position to the amino group are heated in water to produce diaminodiarylmethanes.

Abstract: A dyestuff laser which consists of a reservoir for the dyestuff solution and an energy source, coupled thereto, which is capable of exciting the dyestuff solution to produce an emission, the radiation generated lying in the wavelength range of 550 to 680 nm. The dyestuff is a sulforhodamine.

Abstract: Reactive dyestuffs of the formula ##STR1## wherein W, T, T', n, R, R.sub.1, R.sub.2, p and Z have the meaning given in the description, their preparation and their use for dyeing and printing materials containing N and materials containing hydroxyl groups, especially fibre materials. The dyestuffs are particularly suitable as fluorescent dyestuffs for dyeing or printing natural and synthetic polyamides and natural and regenerated cellulose, especially cotton. They combine a high fixing yield with outstanding wet fastness properties.

Abstract: Coherent monochromatic radiation (laser light) in the wave length range of 450 to 560 nm is obtained by exciting with a pump light source a dyestuff solution containing a dyestuff of the formula ##STR1## wherein R.sub.1 represents hydrogen, alkyl, cycloalkyl, aralkyl, an alkylene radical linked to the 6-position of the coumarin ring system or, together with R.sub.2 and the nitrogen atom to which they are bonded, and optionally with inclusion of further heteroatoms as ring members, represents the remaining members of a heterocyclic ring system, R.sub.2 represents alkyl, aralkyl or an alkylene radical linked to the 8-position of the coumarin ring system and R.sub.3 represents hydrogen or an optionally substituted phenyl radical, the rings A and B can carry further substituents and a carbocyclic 5-membered or 6-membered ring can be fused to the ring B, in a solvent which does not interfere with the emission, at a concentration, which emits laser beams, of, preferably, 10.sup.-.sup.2 to 10.sup.-.sup.4 mol/liter.

Abstract: Dyestuffs of the formula ##STR1## WHEREIN A denotes a ring which contains at least one quaternary nitrogen atom;B denotes an isocyclic or heterocyclic radical;Y denotes a radical for completing a ring;R denotes hydrogen or alkyl;An .sup.- denotes an anion; andk, m and n denote 1 or 2,Are suitable for dyeing and printing of natural and synthetic materials, particularly of polyacrylonitrile, copolymers of acrylonitrile with other vinyl compounds, of acid modified polyesters and acid modified polyamides. The dyestuffs are also useful in writing fluids, rubber stamp inks, ball point pen inks and in inks for flexographic printing.

Abstract: Cationic dyestuffs of the formula ##STR1## WHEREIN R represents an alkyl, alkenyl, cycloalkyl, aralkyl, aryl or heteryl radical or an alkylene radical bonded to A or to a ring fusted with A,R.sub.1 represents hydrogen, an alkyl, aralkyl, aryl or heteryl or nitrile,R.sub.2 represents hydrogen, alkyl, aralkyl or aryl,R.sub.3 represents alkyl,R.sub.4 represents hydrogen, alkyl, aralkyl, aryl, heteryl or alkylene or arylene bonded to R.sub.5,R.sub.5 represents a five- or six-membered aromatic ring,A represents the remaining members of a heterocyclic 5-membered or 6-membered ring andAn.sup.- represents an anion,A process for their preparation and their use for dyeing, printing and bulk dyeing of natural and synthetic materials.

Abstract: Basic azo dyestuffs of the formula ##SPC1##Wherein the radicals have the belov mentioned meaning, are suitable for dyeing and printing of natural and synthetic materials, particularly of polyacrylnitrile, copolymers of acrylnitrile with other vinyl compounds, of acid modified polyesters and acid modified polyamides.

Abstract: A process for the production of aromatic polyamines comprising condensing primary or secondary aromatic amines with formaldehyde or a formaldehyde precursor in the presence of an acid catalyst and liberating the polyamines on completion of condensation by the addition of a basically reacting reagent, wherein a mixture containing amine, catalyst, aldehyde, precondensates formed therefrom, and water, issuing from a mixer at a maximum temperature of about 40.degree.C., is separated intoA. a side stream in which the heat liberated from the reacting mixture is dissipated in a heat exchanger following dilution of the total quantity of mixture of amine and catalyst, cooled to below about 40.degree.C., required for the reaction and the mixture thus obtained is reintroduced at a temperature of at most about 40.degree.C. into the mixer where formaldehyde is added, andB. a main stream which is pumped, through a reaction zone kept at a maximum of about 40.degree.C.