Process for the photochemical stabilization of dyed polyamide fibres with foamed aqueous composition of copper organic complexes
AssigneeCiba-Geigy Corporation
InventorsThys Bouwknegt, Claude Dietz
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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.
Claims24
A process for the photochemical stabilisation of dyed polyamide fibre materials, which comprises treating the dyed material with a foamed aqueous composition which contains at least (a) a non-dyeing copper complex of bisazomethines, acylhydrazones, semicarbazones or thiosemicarbazones of aromatic aldehydes or ketones or oximes.
An aqueous composition comprising
- (a) a non-dyeing copper complex of bisazomethines, acylhydrazones, semicarbazones or thiosemicarbazones of aromatic aldehydes or ketones or oximes
- (b) an anionic or nonionic surfactant or a mixture of said surfactants, and, as optional components,
- (c) a salt of a hydrolysed polymaleic anhydride, and
- (d) a polar organic solvent.
Dependencies are inferred from the claim text.