Process for treating natural polyamide fibres of asymmetric stru

Details Process for treating natural polyamide fibres of asymmetric stru Process for treating natural polyamide fibres of asymmetric stru

1975-02-04

1977-06-21

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

8 97, 8128R, D06M 118

Patent

active

040308839

ABSTRACT:
This invention relates to a process for treating natural polyamidic fibres of asymmetric structure, particularly wool, with liquid ammonia, in which a nucleophilic substance is added to said liquid ammonia. The treatment time is thus reduced and the dye affinity is improved.
An acetate, such as ammonium acetate is preferably used and excellent results are obtained on wool.

REFERENCES:
patent: 3666398 (1972-05-01), Tratnyek
patent: 3802835 (1974-04-01), Prieto
patent: 3824076 (1974-07-01), Ortheil
patent: 3905763 (1975-09-01), Dalle
Chemical Abstracts, vol. 60, 69 and 81, 10951f, 20271s and 171037u respectively.
Fierz-David, H. E. et al., Fundamental Processes of Dye Chemistry, N. Y., 1949, p. 377.

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