Ciba-geigy Corporation

Ciba-geigy Ag

Hans Mollet

Roland Haberli

Martin Holer

Zdenek Koci

Fridolin Babler

Roger Lacroix

Horst H Jager

Paul Dussy

Suresh C Agarwal

Gunther Zwahlen

Christel Tempel

Urs Buchel

Nitya G Podder

Wolfgang Rehmann

Gustaaf Scherer

Alberto Rabassa

Storage-stable, non-sedimenting emulsions comprising

Aqueous antioxidant emulsions

Storage-stable, non-sedimenting emulsions containing

Aqueous emulsions containing antioxidants

Aqueous antioxident emulsions

The invention describes a process for the HT dyeing of polyester fibre material with dyes which are sparingly soluble in water, which process comprises the use of a dyebath which contains at least one block polymer of ethylene oxide and propylene oxide having a molecular weight higher than 5000. The use of such a polymeric non-ionic dispersant ensures, even in low concentration, the stability of the dye dispersion under HT conditions, with at the same time substantial to complete bath exhaustion.

Process for the HT dyeing of polyester materials with ethylene oxide

The invention relates to dyestuff preparations comprising water, a water-insoluble or sparingly water-soluble dye, a dispersant, a humectant, and optionally further additives, wherein said humectant is a compound of the formula I ##STR1## wherein R is a C.sub.1 -C.sub.16 alkyl group which is unsubstituted or substituted by OH, CN, halogen or --N(C.sub.1 -C.sub.4 alkyl).sub.2, and R' is hydrogen or the --CH.sub.2 --CHOH--CH.sub.2 OH group. These preparations are suitable for use in aqueous or aqueous-organic dye liquors or printing inks or also for obtaining printing pastes. After partial or complete dehydration they are also very readily redispersible.

Liquid dyestuff preparations

New solid dyestuff preparations are disclosed consisting of an anionic dyestuff having a particle size of less than 10.mu., a dispersing agent, a basic component, especially sodium bicarbonate, a solid acid component, preferably tartaric acid, as well as, optionally, further additives. The new dyestuff preparations are stable in storage, and have good solubility in water, they are therefore extremely suitable for the preparation of aqueous dye liquors.

Process for the production of dyestuff preparations

Aqueous dye preparations having a migration-regulating action and containing at least one dye insoluble in water, a dispersing agent and at least one further additive, which preparations are characterized in that they contain at least one water-soluble polymerization product containing carboxyl groups.

Aqueous dye preparations

Stable dust-free commercial preparations of organic substances are described, which preparations comprise an organic substance especially a dyestuff or optical brightener in dry powder form enclosed in a covering, particularly in a sack or bag sealed on all sides, made from polyethylene oxide having a molecular weight of more than 200,000 and a thickness of 10 to 80.mu., which covering is soluble in the same medium as the content.

Commercial preparations of dry organic substances

Described is a process for agglomerating a substance from a liquid system with subsequent separation and drying, which liquid system is composed of at least two liquids, which at 20.degree. C. are completely miscible with one another.

Process for agglomerating a substance from a liquid system

Stable, highly concentrated dyestuff solutions which are miscible with water in any proportion are described and which contain at least one azo or nitro dyestuff containing sulphonic acid groups or at least one anthraquinone dyestuff dissolved in a solvent mixture consisting of an aprotic solvent or a mixture of aprotic solvents, a glycol ether and optionally water, e.g. N-methylpyrrolidone/diethylene glycol monomethyl ether which mixture exhibits a pronounced synergetic effect with regard both to the solubility of the dyestuffs and to the stability of the dyestuff solution. These dyestuff solutions are suitable for the production of dye solution for the dyeing or printing of in particular, natural or synthetic nitrogen containing organic fibers especially polyamide carpets.

Stable, highly concentrated dyestuff solutions miscible with water in

An improved process for the production of granules, comprising application of a granulating liquid to a pulverulent substance being subjected to a rotating movement in such an amount that the point of equilibrium between the moisture content of the substance and that of the air is exceeded, and subsequently drying this moist substance until its moisture content falls to or below this point of equilibrium.

Process for the production of granules

A novel process for the complete isolation and rapid drying of a solid, or mixtures of solids, from a suspension, is described in that there is added to the aqueous or organic suspension containing said solid an additional liquid, or a mixture of such liquids, which is a solvent for the solid contained in the suspension, and which liquid is insoluble, or soluble to only a limited extent, in the suspension liquid, in such a way that a multiphase system is formed; and the mixture is maintained in a state of intense turbulence until agglomerates of the solid are formed; and this is then seperated from the multiphase system and optionally dried.

Novel process for the complete isolation and rapid drying of solids from

The present invention concerns new fluid and stable dispersions of anionic dyestuffs, containing

Fluid and stable dispersions of anionic dyestuffs

Disclosed is a solid preparation containing at least one anionic dye or optical brightener, at least one anionic compound having hydrotropic activity, and/or at least one anion-active solubilising agent as well as optionally further additives, such as and preferably a anti-dust agent, whereby this preparation has a very good solubility especially in cold water compared with that of equally strong dyes diluted with customary fillers and can be used for producing aqueous dye preparations useful for dyeing and printing materials dyeable with anionic dyes or optical brighteners.

Dye preparation soluble in cold water

A process for the manufacture of an easily isolatable, dustless, readily dispersible pigment granulate which comprises subjecting a suspension of a finely dispersed organic pigment or pigment preparation, in the presence of water-insoluble granulating assistants belonging to the class of natural, synthetic or semi-synthetic resins, esters of dicarboxylic acids, of arylcarboxylic acids, of arylsulphonic acids, of phosphoric and phosphorous acid, phenylsulphonamides or the alkaline salts of fatty acids containing 12 to 14 carbon atoms, but in the absence of wetting agents, in a two-phase system consisting of an aqueous phase and a second liquid phase which consists substantially of an organic solvent that is virtually insoluble in water and in which the granulating assistant is at least partially soluble, to a turbulent mixing until a granulate has formed, then isolating said granulate, which consists substantially of pigment or pigment preparation, granulating assistant and organic solvent, and removing the solvent therefrom.

Growing community of inventors

Reinach, Switzerland

Hans Mollet