and its mixture with 2 ethoxy 2 39 ethyl 5 4 39 di tert butyloxanilide and mixtures of ortho and para methoxy as well as of o and p ethoxy disubstituted oxanilides 2 8 hydroxyphenyl s triazines for example 2 6 bis 2 4 dimethylphenyl 4 2 hydroxy 4 octyloxyphenyl s triazine 2 6 bis 2 4 dimethylphenyl 4 2 4 dihydroxyphenyl s triazine 2 4 bis 2 4 dihydroxyphenyl 6 4 chlorophenyl s triazine 2 4 bis 2 hydroxy 4 2 hydroxyethoxy phenyl 6 4 chlorophenyl s triazine 2 4 bis 2 hydroxy 4 2 hydroxy 4 2 hydroxyethoxy phenyl 6 2 4 dimethylphenyl s triazine 2 4 bis 2 hydroxy 4 2 hydroxyethoxy phenyl 6 4 bromophenyl s triazine 2 4 bis 2 hydroxy 4 2 acetoxyethoxy phenyl 6 4 chlorophenyl s triazine 2 4 bis 2 4 dihydroxyphenyl 6 2 4 dimethylphenyl s triazine 3 metal deactivators for example n n 39 diphenyloxalic acid diamide n salicylal n 39 salicyloylhydrazine n n 39 bis salicyloylhydrazine n n 39 bis 3 5 di tert butyl 4 hydroxyphenylpropionyl hydrazine 3 salicyloylamino 1 2 4 triazole bis benzylidene oxalic acid dihydrazide 4 phosphites and phosphonites for example triphenyl phosphite diphenylalkyl phosphites.