Process for the photochemical stabilization of dyed polyamide fi

Details Process for the photochemical stabilization of dyed polyamide fi Process for the photochemical stabilization of dyed polyamide fi

1990-12-26

1991-12-03

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Color protecting process for dyed product

8477, 8575, 8602, 8607, 8608, 8624, 8924, D06P 502

Patent

active

050696815

ABSTRACT:
There is disclosed a process for the photochemical stabilization of dyed polyamide fibre materials, which comprises treating the dyed material with an aqueous foamed composition which contains at least a non-dyeing copper complex of bisazomethines, acylhydrazones, semicarbazones or thiosemicarbazones of aromatic aldehydes or ketones or oximes.
By means of the process of this invention it is possible to prevent wastewater from being contaminated with copper-containing impurities.

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