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Polycondensation Dyes. A New Principle for the Preparation of Wash-Fast Cotton Dyeings

โœ Scribed by Dr.-Ing. K. Schimmelschmidt; Dr. Hermann Hoffmann; Dr. E. Baier

Publisher
John Wiley and Sons
Year
1963
Tongue
English
Weight
210 KB
Volume
2
Category
Article
ISSN
0044-8249

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โœฆ Synopsis

Abstract

Dyes which contain only thiosulfate residues as waterโ€solubilizing groups are readily polycondensed on cellulose under mild conditions in the presence of condensing agents such as sodium sulfide to give insoluble, high molecularโ€weight dyes. This type of fixation leads to washโ€fast dyeings and, in contrast to reactive dyes, involves no reaction with the fiber. The preparation and application of the dyes are described.

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