Ciba-Geigy Corporation

Ciba-Geigy Ag

Ciba Specialty Chemicals Corporation

Stefan Koller

Raymond Defago

Urs Karlen

Rudolf Zink

Peter Loew

Peter Aeschlimann

Peter E Eugster

Dieter Reinker

Hans Rudolf Schwander

Werner Kneubuhler

Marielise Pacher

Kurt Burdeska

Jean C Petitpierre

Hansrudolf Schwander

Peter Scheibli

Mickael Mheidle

Peter Moser

Andres Schaub

Josef Koller

Hans Wilhelm Liechti

Véronique Hall-Goulle

Paul Dussy

Arnulf Ruediger Lapple

Suresh C Agarwal

Hans Scheidegger

Karl Emmenegger

Alain Vantillard

The invention relates to an ink composition containing (a) a compound of formula (I), L&#x2212;Ln(Ch)(I), wherein Ln represents a lanthanide, CHis a negatively charged ligand containing at least one UV absorbing double bond, n denotes 3 or 4, m denotes a number from 1 to 4, in case n is 3, m denotes a number from 1 to 4 and L is a neutral monodentate or polydentate nitrogen-, oxygen- or sulfur-containing UV absorbing ligand with the exception of 2,2'-bipyridyl or, in case n is 4, m denotes 1 and L is a single-charged cation; and (b) a liquid ink carrier, which can be used for applying hidden mark on objects which can only be revealed under UV exposure.

Ink compositions containing lanthanide complexes

Process for the staining of wood with aqueous wood stains

By the slow stepwise heating up of an aqueous suspension of the crystallographically amorphous dye of the formula ##STR1## which dye is unstable to dyeing, to a temperature of 90.degree.-100.degree. C. with a halting point at 40.degree.-60.degree. C., this dye can be transformed completely into the crystalline .alpha.-modification. The novel dye modification can be easily converted, without increase of viscosity, into thinly liquid formulations which are readily pourable, which form no sediment, and which are excellently suitable for producing printing pastes, for example for printing polyester fabric.

Disperse dye stable to dyeing, and its use for dyeing and printing

By suspension of the melt of the known crystallographically amorphous dye of the formula ##STR1## which is unstable to dyeing, in water at a temperature of 90.degree. to 130.degree. C., this dye can be caused to crystallize. There is obtained a crystalline granulate in which the dye is completely in the novel .epsilon.-modification. The novel dye modification is stable in dispersion under dyeing conditions, and has no tendency to flocculate.

It is possible by heating at temperatures of between 65.degree. and 200.degree. C. to convert the known .alpha.-modification of the azo dye of the formula ##STR1## which is unstable to dyeing, completely into the .beta.-modification which is stable to dyeing. The modification transformation can be performed either with the solid dye or with a suspension thereof in an organic, preferably aromatic, solvent. The novel dye modification is stable in dispersion under dyeing conditions, and shows no tendency to flocculate.

Disperse dye stable to dyeing, and its use for dyeing synthetic and

An azo dyestuff which is free from groups conferring solubility in water and has the general formula I ##STR1## in which R denotes hydrogen, halogen, a hydrocarbon radical with up to 18 carbon atoms which is bonded by means of a direct bond or a sulphur or oxygen atom and can be substituted, trifluoromethyl, cyano, dichlorocyanomethyl, chlorodicyanomethyl, tribromomethyl or trichloromethyl or denotes a heterocyclic radical containing nitrogen, Hal is a halogen atom, R.sub.1 is an optionally substituted alkyl group and 'acyl' denotes the acyl radical of an organic carboxylic acid, carbamic acid, carbonic acid or sulphonic acid with, preferably up to 0.18 carbon atoms. The new dyestuffs dye polyester fibers in fast red shades.

Azo compounds, containing a 1,2,4-thiadiazole moiety

There are described new cationic dyes of the formula ##STR1## wherein R 's independently of one another each represent a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms,

Cationic dyes

Process for the pad-dyeing and printing of textile material made from mixed fibres of cellulose and polyester, which process comprises impregnating of printing the textile material with a dispersion of a disperse dye containing at least one hetero atom which can be alkylated; treating the textile material, before, during or after the impregnating or printing operation, with a compound containing at least two epoxy groups or groups convertible into epoxy groups; and subjecting the material impregnated or printed with dye and epoxy compound to a heat treatment.

Process for the pad-dyeing and printing of textile material made from

There are described new styryl compounds of the formula ##STR1## in which X is .dbd.CH.sub.2, --O--, --S-- or the grouping .dbd.NR.sub.3 wherein R.sub.3 is hydrogen or an alkyl group having 1 to 4 carbon atoms,

Styryl compounds

New yellow cationic dyes of the formula ##STR1## ARE DISCLOSED WHEREIN X represents hydrogen or halogen,

1,3,3-Trimethyl-2-methylene indoline cationic n-methyl azo dyes

A class of dispersible phenyl-azo-aniline dyestuffs corresponding to the formula ##STR1## wherein A is phenyl substituted by halogen, cyano, nitro, lower alkylsulphonyl, lower alkoxycarbonyl, di-lower-alkyl-carbamoyl or di-lower-alkyl-sulfamoyl,

Method of dyeing with dispersible azo anilino dyestuffs

Cationic azo dyes of formula ##STR1## wherein R represents a substituted or unsubstituted alkyl radical, each of R.sub.1 and R.sub.2 represents hydrogen or a substituted or unsubstituted alkyl or aryl radical, X.sup..crclbar. is the charge equivalent of an anion, and wherein the benzene ring A and the pyridine ring B are unsubstituted or substituted by non-ionogenic substituents, and wherein the cationic component does not contain any groups which exhibit acid dissociation in water.

Pyridyl-azo-indolyl cationic dyes

A dry heat process for dyeing and printing and optically brightening organic material which can be dyed with cationic dyes, which process comprises the use of electroneutral, deprotonized cationic dyes or fluorescent brighteners together with at least one indicator dye.

Dry heat process for dyeing and printing organic material which can be

A process for dyeing polyacrylonitrile materials in clear, neutral blue shades, which comprises the use of a mixture of an oxazine dye of the formula ##STR1## and a naphtholactam dye of the formula ##STR2## in the ratio of 1:3 to 3:1, in which formulae R.sub.1 and R.sub.2 represent low molecular alkyl radicals, R.sub.3 represents a low molecular alkyl radical or an aryl radical, R.sub.4 represents hydrogen or a low molecular alkyl radical, each of R.sub.5 and R.sub.6 represents a low molecular alkyl radical, Y represents a halogen atom and X.sup..crclbar. represents an anion and a dyestuff preparation which contains an oxazine dye of the formula (1) and a naphtholactam dye of the formula (2) in the ratio 1:3 to 3:1.

Dyeing preparations and process for dyeing polyacrylonitrile material in

The present invention provides useful new fibre-reactive disperse dyes of the formula (1) ##STR1## wherein R.sub.1 represents hydrogen or alkyl,

Growing community of inventors

Ramlinsburg, Switzerland

Stefan Koller