Abstract:
Mixtures of monoazo compounds which are obtainable by diazotizing 0.75 to 0.85 molar equivalent of 5-nitro-2-amino-anisol and 0.25 to 0.15 molar equivalent of 3-nitro-4-amino-anisol and coupling onto 2-acetoacetylamino-anisol are pigments of high tinctorial strength, transparency, gloss and fastness to light having good rheological properties.
Abstract:
A water-soluble monoazo-dyestuff of the formula (1) ##STR1## in which X represents --CH=CH.sub.2 or --CH.sub.2 --CH.sub.2 --Z, the radical Z stands for hydroxyl, sulfato, chlorine, bromine, lower alkyl-sulfonyloxy, lower alkyl-sulfonylamino, phenyl-sulfonyloxy, lower alkyl-phenyl-sulfonyloxy, phenyl-sulfonylamino, lower alkyloyloxy, monosulfobenzoyloxy, phenoxy, di-(lower alkyl)-amino, tri-(lower alkyl)-ammonium, thiosulfato or phosphato, and A is a radical of a coupling component of the aminobenzene, hydroxybenzene amino-naphthalene, hydroxynaphthalene, N-naphthyl- or N-phenyl-amino-pyrazole, N-naphthyl- or N-phenyl-pyrazolone or of the acetoacetanilide series, the coupling component containing at least one water-solubilizing group, and a process for preparing these dyestuffs which are very suitable for the dyeing and printing of native and synthetic carbonamide-groups containing and native, regenerated or synthetic hydroxy-groups containing material, and yield, especially on cellulose fibrous materials in the presence of alkaline agents dyeings and prints of good to very good fastnesses to light and to wet-processing and of good stability to alkalis. The novel dyestuffs also have a very good color-build-up and yield dyeings and prints of high tinetorial strength.
Abstract:
Novel valuable, water-insoluble disazo pigments of the general formula 1 ##SPC1##Wherein R is hydrogen, methyl, methoxy or halogen, preferably chlorine or bromine, and X also represents hydrogen or halogen, preferably chlorine. The disazo compounds are obtained by bisdiazotizing a 2,7-diaminodiphenylenesulfone and coupling it on an acetoacetylbenzimidazolone. These pigments are suitable for preparing printing inks, color lakes and dispersion paints, for dyeing rubber, plastics and natural or synthetic resins. Furthermore, they are suitable for the printing of pigments on substrates, especially textile fibre materials or other flat articles such as paper.The pigments may be used for other purposes, for example in a finely divided form for dyeing rayon of viscose or cellulose ethers or esters, polyamides, polyurethanes, polyglycolterephthalate or polyacrylonitriles in the spinning mass or for dyeing paper. The pigments may be processed well in the mentioned media. The dyeings have a good color intensity as well as good fastnesses to light and to migration and are resistant to the influence of heat and chemical products, above all solvents.
Abstract:
The invention relates to 4,4'-diaminodiphenyl compounds of the formula I ##STR1## in which X denotes the n-propyl, isopropyl, n-butyl, isobutyl, 1-methylpropyl, n-propoxy, isopropoxy, isobutoxy, 1-methylpropoxy or 2-methoxyethoxy radical and A is 0 or the equivalent of an inorganic acid.The preparation is effected by reducing ortho-X-substituted nitrobenzene and benzidine rearrangement of the resulting hydrazobenzene derivative. The compounds of the formula (I) are suitable for use as components in the preparation of dyes and pigments.
Abstract:
An improved process for the manufacture of a monoazo acetoacetylaminobenzimidazolone pigment of the formula ##STR1## by coupling the components in an aqueous medium in the presence of an oxethylation product of an alcohol or alcohol mixture having from 8 to 14 carbon atoms and 3 to 10 mols of ethylene oxide, and heating the aqueous pigment suspension after complete coupling. The pigment thus obtained avoids an after-treatment in anhydrous organic solvents and has good tinctorial strength, high hiding power and good properties with respect to flow and dispersibility.
Abstract:
Disazo compounds of the formula I ##STR1## in which X and Y are identical or different and denote hydrogen, bromine, chlorine, methyl, methoxy, ethoxy, nitro, trifluoromethyl, carbomethoxy or carboethoxy, A.sup.1 and A.sup.2, independently of each other, represent hydrogen, methyl or ethyl and Z.sup.1 and Z.sup.2 in the 6- or 7-position of the heteroaromatic ring system, independently of each other, represent hydrogen, bromine, chlorine, methyl, methoxy, ethoxy, carbomethoxy, carboethoxy or nitro, are obtained by coupling a monodiazotized p-diaminobenzene substituted by X and Y analogously to the formula I with a 5-acetoacetylaminobenzimidazolone which carries the radicals A.sup.1 and Z.sup.2 analogously to the formula I, and reacting the resulting aminoazo compound after another diazotization with a 5-acetoacetylaminobenzimidazolone which carries the radicals A.sup.2 and Z.sup.2 analogously to the formula I, to give the disazo compound of the formula I. The crude product is subsequently thermally aftertreated at 80.degree. to 200.degree. C.In the case where X, Y or Z.sup.1 does not denote a nitro group, it is possible to use as an alternative to the p-diaminobenzene derivative a corresponding p-aminonitrobenzene derivative. In this case, analogous diazotization and coupling is followed by reduction of the resulting nitroazo compound to the aminoazo compound, which is converted into the compound of the formula I as described above.The symmetrical or asymmetrical disazo compounds of the formula (I) are obtained in a particle size of .ltoreq.0.25 .mu.m and are suitable for use as pigments in printing inks, lakes and emulsion paints, for coloring plastics, rubber, natural and synthetic resins or spinning compositions and for pigment printing on, for example, textile fiber materials and paper. The pigments are tinctorially very strong and have very high solvent, migration, light and weathering fastness properties and a high thermostability.
Abstract:
A water-soluble monoazo-dyestuff having in form of the free acid the formula ##STR1## WHEREIN A represents as a radical of a diazo component phenyl; phenyl substituted by lower alkyl, lower alkylsulfonyl, lower alkoxy, carboxyl, trifluoromethyl, cyano, fluorine, chlorine, bromine, sulfonamido and carbonamido; naphthyl, nitronaphthylene, ##STR2## X represents hydrogen; phenyl; nitrophenylene or naphthyl, R represents as a bridging member --SO.sub.2 --, --CO--, --S--, --CO--NH--, --NH--CO--, --SO.sub.2 --NH--, --NH--SO.sub.2 --, --CH.sub.2 --, --NH-- or --N(lower alkyl)--; B represents as the radical of a coupling component N,N-di(lower alkyl)amino-phenylene, N,N-di (lower alkyl)amino-chloro-phenylene; hydroxyquinoline; diphenylamine; hydroxynaphthylene; hydroxynaphthylene substituted by acetylamino, benzoylamino or ##STR3## aminonaphthylene; ##STR4## substituted on the benzene nucleus by lower alkyl, lower alkoxy, chlorine and bromine; Z represents hydrogen, --COOH or --SO.sub.3 H, Y represents a direct linkage or one of the groupings --CH.sub.2 --, --CH.sub.2 13 CH.sub.2 --, --NH-- or --N(lower alkyl)--, the said groupings --Y--SO.sub.2 --CH.sub.2 --CH.sub.2 --O--PO.sub.3 H.sub.2 and Z being linked to A, B or X, n stands for an integer from 1 to 3 and m stands for an integer from 1 to 5, said dyestuffs being suitable for the dyeing or printing of leather or fibrous materials consisting of native or regenerated cellulose, wool, silk or polyamides, the dyeings and prints obtained on said materials being distinguished by deep tints and very good fastness properties to light and wetting.
Abstract:
Condensing of 1-formyl-2-hydroxy-3-naphthalenecarboxylic acid arylamides with ammonia or aromatic amines yields novel azamethines which are useful as coloring matters, especially as pigments.
Abstract:
A highly covering disazo pigment having the chemical constitution ##SPC1##Which is characterized by a specific surface of 12 - 30, preferably 15 to 25, m.sup.2 /g, a maximum of the grain size distribution of between 250 and 500 nm and a proportion of these grain sizes in the total distribution of 35 - 65 percent, preferably 45 - 60 percent. This new pigment form is obtained by heating the pigment obtained after coupling with a solvent which is immiscible with water or miscible with water to a limited degree only to temperatures above 100.degree.C.
Abstract:
The disazo pigment of the formula ##SPC1##Characterized by a specific surface of 12 - 20, preferably 13 - 18 m.sup.2 /g, a maximum of the distribution of the grain sizes of between 500 and 1000 nm and a proportion of these grain sizes in the total distribution of between 35 and 65 %. This disazo pigment is obtained by isolating the pigment, after coupling, by stirring it out with alkali and, after having filtered it and washed it to neutrality, heating it to temperatures above 100.degree. C in a mixture of water and a solvent which is immiscible with water or miscible with water to a limited degree only.