Ciba-geigy Corporation

Ciba-geigy Ag

Walter Lang

Peter Loew

Gert Hegar

Remy Jeanneret

Anton Kaiser

A process for producing solutions of salts of water-soluble carboxylic acids of cationic dyes or optical brighteners, the solutions of cationic dye salts or brighteners salts which are obtained by this process and which are miscible with water in any proportion, and the use of these solutions for preparing dye liquors and printing pastes for dyeing, optical brightening and printing of, in particular, synthetic textile materials, which process comprises reacting the halide of a cationic dye or brighteners, in an aqueous or anhydrous medium, with at least one water-soluble carboxylic acid in the presence of an epoxide compound having a minimum of 13 carbon atoms.

Process for producing solutions of salts of water-soluble carboxylic

The invention relates to a dispersion of a water-soluble basic dyestuff in an organic solvent that is at least partially miscible with water or in a mixture of such a solvent with water.

Stable, concentrated dispersions of basic dyestuffs

A process for producing solutions of salts of lower aliphatic carboxylic acids of cationic dyestuffs which consists essentially of converting the halide, especially the chloride, of a cationic dyestuff into the salt of a lower aliphatic carboxylic acid by reacting the halide with the corresponding carboxylic acid in the presence of an epoxide compound having a maximum of 12 carbon atoms.

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Pfeffingen, Switzerland

Walter Lang