Process for photochemical stabilization of undyed and dyed polyamide fibre material and blends thereof with other fibres: copper complex and light stabilizer treatment

DETAILED DESCRIPTION What we claim is: 1.
A process for the photochemical stabilization of undyed and dyed polyamide fiber material or blends thereof with other fiber material, which comprises treating the fiber material with a mixture of (A) a non-dyeing copper complex of an alkylene bisazomethine, cycloalkylene bisazomethine, acylhydrazone, semicarbazone or thiosemicarbazone of an aromatic aldehyde or ketone, or an oxime, (B) a light stabilizer and, if desired, (C) an antioxidant.
2.
A process according to claim 1, wherein the components (A) used is a copper complex of the formula (1) ##STR44## in which R is hydrogen or a substituted or unsubstituted alkyl or aryl radical, Q is a substituted or unsubstituted alkylene or cycloalkylene radical and n is 0, 1, 2 or 3, and the benzene rings A and B can be substituted independently of one another.
3.
A process according to claim 2, wherein the component (A) used is a bisazomethine complex of the formula (2) ##STR45## in which R' is hydrogen, or C.
sub.
1 -C.
sub.
3 -alkyl, R.
sub.
1, R.
sub.
2, R.
sub.
3 and R.
sub.
4 are each hydrogen, halogen, hydroxy, hydroxyalkyl, alkyl, alkoxy, alkoxyalkoxy, alkoxyalkoxyalkoxy, carboxymethoxy, alkylamino, dialkylamino, --SO.
sub.
2 NH.
sub.
2, --SO.
sub.
2 NHR.
sub.
o or --SO.
sub.
2 N(R.
sub.
o).
sub.
2, R.
sub.
o being alkyl or alkoxyalkyl, and alkyl or alkoxy each being understood as meaning groups having 1-4 carbon atoms, or R.
sub.
1 and R.
sub.
2 or R.
sub.
2 and R.
sub.
3 or R.
sub.
3 and R.
sub.
4 together with the carbon atoms, to which they are linked, form a benzene radical, and Q.
sub.
1 is a C.
sub.
2 -C.
sub.
4 -alkylene radical, a C.
sub.
2 -C.
sub.
8 -alkylene radical interrupted by a oxygen or nitrogen or a ##STR46## bridge, in which X and Y each are C.
sub.
1 -C.
sub.
4 -alkyl or an aromatic radical or X and Y, together with the carbon atoms to which they are linked, form a cycloaliphatic radical having 5-7 carbon atoms.
4.
A process according to claim 1, wherein the component (A) used is an acylhydrazone of an aromatic aldehyde or ketone, of the formula (3) ##STR47## in which R