Ciba-geigy Corporation

Pierre Perrin

Gert Hegar

Herbert Seiler

Ulrich Horn

Gerald Siegrist

Raymond Defago

Andres Schaub

Arthur Schmutz

A process for improving the color yield and the wetfastness properties of dyeings produced on cellulose fibre material with anionic dyes, which process comprises treating the cellulose material before, during or after dyeing, with a cationic fibre-reactive compound of the formula ##STR1## wherein B represents a mono- or polynuclear heterocyclic radical,

Process for improving the color yield and fastness properties of dyeings

A process for improving the color yield and the wet-fastness properties of dyeings produced on cellulose fibrous material with anionic dyes which process comprises treating the cellulose material before, during or after dyeing, with a fluorine-containing cationic compound of the formula ##STR1## WHEREIN B represents a triazine or pyrimidine radical,

Described is a process for the semi-continuous or continuous dyeing and printing or optical brightening of cellulose materials by impregnation of the material with an aqueous liquor or printing paste containing at least one fibre-reactive dyestuff or fibre-reactive optical brightener, wherein subsequent to impregnation, fixing of the dyestuff or optical brightener is performed in a salt-free single-phase bath containing at least one alcohol and alkali and optionally water. By this process there are obtained dyed or optically brightened cellulose materials having fastness properties equivalent to those obtained in the conventional manner. An advantage of the present process, in contrast to the usual processes, is that the waste water is not polluted by large amounts of salt.

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Basel, Switzerland

Pierre Perrin