Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Dierk Knittel

Eckhard Schollmeyer

Hans-Jürgen Buschmann

Wolfgang Saus

Hans-Jurgen Buschmann

The invention relates to a process for the preparation of reactive cyclodextrins, in which process the cyclodextrins CD are reacted with a bifunctional alkyl compound X&#x2014;(CH)&#x2014;Y, wherein X is a group which reacts with CD, n is an integer from 2 to 20 and Y is a group which reacts with a group Z or is a group-Reactive which is capable of reaction with cellulosic or proteinic materials and, optionally, in a further step, insofar as Y is a group which reacts with a group Z, the resulting product is reacted with a reactive anchor compound Z-Reactive to form the reactive cyclodextrin, and also to reactive cyclodextrins prepared in accordance therewith, to materials dressed therewith and to the use thereof.

Method for producing reactive cyclodextrins, textile material provided with same, and use of said cyclodextrin derivatives

Dyeing polyester textile material with disperse dyes from supercritical CO.sub.2 gives stronger dyeings by carrying out the subsequent pressure reduction in a plurality of steps.

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Krefeld, Germany

Dierk Knittel