Basf Aktiengesellschaft

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Basf Aktiengeschaft

Peter Miederer

Peter Schultz

Manfred Gang

Rudolf Kruger

Albert Hettche

Johannes Dehnert

Stefan Weiss

Eberhard Beckmann

Manfred Gaeng

Rudolf Kr&uuml;ger

Lutz Goethlich

Eberhard Michaelis

Juergen Ciprian

Manfred G&auml;ng

Manfred R Wolf

Harald Schluter

Concentrated leuco indigo solutions useful for dyeing cellulosic textile material consist essentially of from 25 to 55% by weight of leuco indigo in the form of the leuco indigo salt, an amount which is essentially stoichiometrically sufficient to convert the leuco indigo into the neutral leuco indigo salt of a mixture of at least two alkali metal hydroxides wherein none of the alkali metal hydroxides accounts for more than 70 mol %, and water.

Concentrated leucoindigo solutions

Leuco vat dye preparations in granule form

Leuco vat-dye preparations in granule form

Leucoindigo preparatations in granule form

1,4-Diaminoanthraquinone-2-sulfonic acid or salts thereof are reacted with cyanide ions at pH 8-11 in the presence of oxidizing agents in a mixture of water and 1-methoxy-2-propanol, 2-methoxy-1-propanol, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropionamide, dimethyl sulfoxide, dioxane, N-methylpyrrolidone or mixtures thereof, the ratio water: organic liquid being .gtoreq.3:1, the reaction proceeding at higher concentrations than in a purely aqueous medium and producing appreciably purer products in a high space-time yield.

Preparation of 1,4-diamino-2,3-dicyanoanthraquinone

A process for the preparation of water-emulsifiable polyethylene by oxidizing high density polyethylene, at below the softening point of the polyethylene, in the presence of oxygen, wherein the oxidation is carried out in a fluidized bed reactor, using a polyethylene which beforehand has been heated, with exclusion of oxygen, in the presence of a compound which forms free radicals.

Preparation of emulsifiable polyethylene by oxidizing polyethylene in a

Uniformly dyed water-swellable cellulosic fibers obtained by dyeing cellulosic fibers in the swollen state with a dye of the formula ##STR1## in which D is the radical of a diazo component and R is an aliphatic, cycloaliphatic or araliphatic radical. The fibers are eminently suitable as textile material.

Uniformly disperse dyed water-swellable cellulosic fibers

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Hassloch, Germany

Peter Miederer