Ciba-geigy Corporation

Paul Hugelshofer

Heinz Abel

Roger Lacroix

Arthur Buhler

Beat Bruttel

Zdenek Koci

Heinz Pfenninger

Peter Zbinden

The invention relates to solid formulations of dyes which are insoluble or sparingly soluble in water, which formulations contain a dialkyl sulfosuccinate having 3 to 8 carbon atoms in each alkyl moiety, or a C.sub.3 -C.sub.6 alkylnaphthalenesulfonate and/or a branched or unbranched acetylene glycol containing 8 to 20 carbon atoms, in addition to the dye and one or more anionic dispersants, optionally together with further auxiliaries conventionally employed in powdered formulations. These formulations are characterized by very good wettability, excellent dispersibility and good redispersibility. The dyebaths and padding liquors prepared with these formulation are non-foaming or only low foaming and are in addition stably disperse. They are suitable for dyeing and printing natural and synthetic fibres.

Solid formulations of dyes which are sparingly soluble or insoluble in

A process for the preparation of storage-stable concentrated fluid dye compositions of water-soluble dyes, wherein an aqueous solution or suspension of at least one anionic crude dye is passed over a semi-permeable membrane containing ionic groups and having a pore diameter of 1 to 500 .ANG., to remove salts and synthesis by-products of molecular weights less than 500 and to partially remove water, optionally dried, and mixed with a water-miscible organic solvent and, if desired, further additives, before and/or after passage over the semi-permeable membrane. The fluid dye compositions obtained are particularly suitable for use in spray solutions for dyeing leather, as well as for the dying and printing of textile materials, in particular cellulosic fibres.

Process for the preparation of concentrated fluid dye compositions

The invention relates to a process for the preparation of storage stable compositions of sparingly soluble or water-insoluble colorants, which process comprises mixing an aqueous suspension of at least one sparingly soluble or water-insoluble colorant with at least one surface-active substance, subjecting the mixture to ultrafiltration through an asymmetrical membrane which contains ionic groups and has a pore diameter of 1 to 500 .ANG. and a cut-off level in the molecular weight range from 300 to 500, subsequently subjecting the resultant concentrate to wet grinding and, if desired, drying, in particular spray drying the dispersion so obtained. The colorant compositions are particularly suitable for preparing padding liquors, dyebaths and printing pastes for coloring and printing textile materials, especially those made from cellulose and synthetic polyester.

Process for the preparation of storage stable colorant compositions by

Concentrated fluid formulations of textile dyes, leather dyes or paper dyes, comprising

Stable concentrated fluid formulations of metal-free dyes, process for

Stable concentrated liquid preparations of metal complex dyes are provided. These preparations contain (1) a metal complex dye, (2) a non-ionic compound having a hydrotropic action and at least one of components (3) or (4), component (3) being a reaction product of a fatty acid having 8 to 22 carbon atoms and 1 to 2 mols of diethanolamine and component (4) being a compound of the formula ##STR1## in which R is an aliphatic hydrocarbon radical having 8 to 22 carbon atoms or a cycloaliphatic, aromatic or aliphatic-aromatic hydrocarbon radical having 10 to 22 carbon atoms, R.sub.1 is hydrogen or methyl, A is --O-- or ##STR2## X is the acid radical of an inorganic, oxygen-containing acid, the acid radical of a polybasic carboxylic acid or a carboxyalkyl radical and m is a number from 1 to 50, and (5) water, a water-soluble organic solvent having a boiling point of at least 80.degree. C. or a mixture of the two and (6) optionally conventional formulating agents. The preparations have a good stability on storage over a broad temperature range and can be diluted with water and/or organic solvents without precipitating the dye or producing other inhomogeneities. The preparations are useful for preparing padding liquors, dye baths printing pastes and spray solutions.

Stable concentrated liquid preparations of metal complex dyes

Stable concentrated solutions of sulfogroup-containing azo-dyestuff-metal complexes in water-miscible organic solvents.

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Muttenz, Switzerland

Paul Hugelshofer