Abstract: A new class of water-soluble monoazo cationic dyestuffs free from sulphonic or carboxylic acid groups is disclosed. A process for preparing the new dyestuffs, which are derived from 1-phenyl-3-aminopyrazoles, is also disclosed.

Abstract: There are provided new pigments of the "bismethinic" type having the formula ##STR1## where A is benzene, 2,5-dimethoxy-benzene, 2,5-dichlorobenzene, naphthalene, diphenyl or anthracene, and B is azobenzene, azotoluene, 2-methoxy-5-benzanilide, 2-methoxy-3',4'-chloroazobenzene, 2-hydroxy-5-methyl-benzene, 2-methoxy-5-benzoylamino-benzene, 2-methoxy-5-ureido-benzene, 2-chloro-5-carboxybenzene, 2,4-dichloro-benzene, 2,5-dimethoxy-4-chloro-benzene, benzothiazole, 1-(3-chlorophenyl)-pyrazole, 1-(3,4-dichlorophenyl)-pyrazole, indazole, 2,4-dimethoxy-benzene, 4-dimethylamino-benzene, benzimidazolone, 2-methoxy-5-acetylamino-benzene or 2-methoxy-benzene.

Abstract: 3-Diazonium salts of pyrazole, useful as intermediates in the preparation of azo dyes are obtained by an oxidative diazotization of 3-amino-pyrazolines with nitrous acid or with nitrosyl-sulphuric acid. The 3-diazonium salts of pyrazole have the following structure: ##STR1## wherein: X is a radical --CO-- or --COO--,n is 0 or 1,R is hydrogen (in such case n is always 0), a normal or ramified alkyl C.sub.1 --C.sub.4, an aromatic or heterocyclic, optionally substituted, radical, in particular a phenyl radical having the structure: ##STR2## in which m may vary from 0 to 3 and substituents R.sub.3, either like or unlike one another for m>1, are alkyls C.sub.1 --C.sub.4 with linear or ramified chain, halogens, a cyano, nitro, sulphonic or carboxylic group, carboxyesters having a linear or ramified chain C.sub.1 --C.sub.4, alkoxyls having a linear or ramified chain C.sub.1 --C.sub.4, trifluoro-methyl groups, acylamino groups having a linear or ramified aliphatic chain C.sub.1 --C.sub.

Abstract: A new class of hydrosoluble monoazoic cationic dyes free of sulphonic or carboxylic groups and derived from 1-phenyl-3-aminopyrazoles is disclosed, as are, also, processes for preparing the new dyes and use thereof in the dyeing and printing of synthetic fibers.

Abstract: The present invention concerns a new class of pigments derived from cumarin and, more particularly, of bis-iminocumarinic and bis-cumarinic pigments having the following formula I described hereinlater. The present invention also includes novel processes for making the cumarinic pigments of the invention. Also, the invention relates to the use of the novel pigments of the invention for the preparation of paints, storing enamels, inks and pastes for the printing of fabrics. Also, included in this invention is the dyeing of plastic materials with the novel cumarinic pigments.

Abstract: New yellow mono-azo dyes which are insoluble in water are disclosed. The dyes are derived from 1-phenyl-3-aminopyrazoles and are particularly effective in dyeing synthetic hydrophobic fibers to intense yellow shades.

Abstract: 1-PHENYL-3-AMINO-2-PYRAZOLINES ARE CATALYTICALLY OXIDIZED TO 1-PHENYL-3-AMINOPYRAZOLES, USING OXYGEN AND/OR AIR AS THE OXIDIZING AGENT AND IN THE PRESENCE OF COPPER SALTS, OPTIONALLY ASSOCIATED WITH METALLIC COPPER AND/OR AN AROMATIC, HETEROCYCLIC ORGANIC BASE SELECTED FROM N-dialkyl anilines, pyridines, piperidine, and ethanolamine, or equivalents thereof, in an inert reaction medium and at a temperature of from about 20.degree. C. to about 40.degree. C.

Abstract: There is provided a new azoic dye having the general formula ##STR1## wherein: A is an aromatic radical of the benzene class which has been substituted with at least one group selected from among alkyl, alkoxyl, N-dialkylamine, halogen, cyano and nitro;X is selected from the group consisting of NH and O;R.sub.1 is selected from the group consisting of H, CH.sub.3, OCH.sub.3 and Cl;R.sub.2 is selected from the group consisting of H, CH.sub.3, OCH.sub.3, Cl;R.sub.3 is selected from the group consisting of CH.sub.3 and C.sub.2 H.sub.5 ; andR.sub.4 is the same as R.sub.3, such dye being useful in the printing and dyeing of the textiles, particularly hydrophobic synthetic fibers such as polyester fibers.

Abstract: Hydrosoluble, cationic, azo dyes of the formula: ##SPC1##Wherein:R is an alkyl or aralkyl group;R' is an alkyl group having from 1 to 4 carbon atoms;R" is H, an alkyl group having from 1 to 4 carbon atoms or a halogen;R'" is an alkyl group having from 1 to 4 carbon atoms or a C.sub.1 -C.sub.4 alkyl group substituted by a halogen, cyano, hydroxy, alkoxy or acyloxy group;Y is a cyano, amido, acyloxy or carboalkoxy group; andX is an anion, are obtained by:A. diazotizing a 2-amino-6-alkoxybenzothiazole of the formula (II): ##SPC2##b. coupling the resultant diazo compound in an acid solution with a tertiary amine of the formula (III): ##SPC3##wherein R', R", R'" and Y are as defined above; andC. quaternizing the resultant dye.