Process for photochemical stabilization of non-dyed and dyed polyamide fibre material and mixtures thereof
AssigneeCiba-Geigy Corporation
InventorsGerhard Reinert, Helmut Huber-Emden, Gerhard Back
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Abstract
A process for photochemical stabilization of non-dyed and dyed polyamide fibre material and mixtures thereof with other fibres which comprises treating the fibre material with a fibre-reactive copper complex of bisazomethines prepared from, for example, salicylaldehydes and aliphatic diamines is described. Some of these copper complexes used are novel compounds. The polyamide fibre material, for example textile material, thus treated largely retains its extensibility and elasticity even after relatively prolonged exposure to light. In addition, a clear improvement in light-fastness is achieved in dyed material by treatment with the metal complex.
Claims8
A process for photochemical stabilisation of polyamide fibre material or a mixture thereof with another fibre material, which comprises treating the polyamide fibre material with a copper complex of the formula ##STR17## in which A.sup.1 is hydrogen or C.sup.1 -C.sup.3 -alkyl, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen, halogen, hydroxyl, hydroxyalkyl, alkyl, alkoxy, alkyoxyalkoxy, alkoxyalkoxyalkoxy, carboxymethoxy, alkylamino, dialkylamino, --SO.sub.2 NH.sub.2, --SO.sub.2 NHR or --SO.sub.2 NR.sub.2, in which R is alkyl or alkoxyalkyl and alkyl or alkoxy is in each case to be understood as a group with 1-4 C atoms, or R.sup.1 and R.sup.2 or R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4, together with the C atoms to which they are bonded, form a benzene radical, and X.sup.1 and Y.sup.1 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or an aromatic radical, or X.sup.1 and Y.sup.1, together with the C atoms to which they are bonded, form a cycloaliphatic radical with 5-7 C atoms.
Dependencies are inferred from the claim text.