5 di tert butyl 4 hydroxybenzyl malonate and di 4 1 1 3 3 tetramethylbutyl phenyl 2 2 bis 3 5 di tert butyl 4 hydroxybenzyl malonate 1 7 hydroxybenzyl aromatic compounds such as for example 1 3 5 tri 3 5 di tert butyl 4 hydroxybenzyl 2 4 6 trimethylbenzene 1 4 di 3 5 di tert butyl 4 hydroxybenzyl 2 3 5 6 tetramethylbenzene and 2 4 6 tri 3 5 di tert butyl 4 hydroxybenzyl phenol 1 8 s triazine compounds such as for example 2 4 bis octylmercapto 6 3 5 di tert butyl 4 hydroxy anilino s triazine 2 octylmercapto 4 6 bis 3 5 di tert butyl 4 hydroxyanilino s triazine 2 octylmercapto 4 6 bis 3 5 di tert butyl 4 hydroxyphenoxy s triazine 2 4 6 tris 3 5 di tert butyl 4 hydroxyphenoxy s triazine 2 4 6 tris 3 5 di tert butyl 4 hydroxyphenylethyl s triazine and 1 3 5 tris 3 5 di tert butyl 4 hydroxybenzyl isocyanurate 1 9 amides of u03b2 3 5 di tert butyl 4 hydroxyphenyl propionic acid such as for example 1 3 5 tris 3 5 di tert butyl 4 hydroxyphenyl propionyl hexahydro s triazine and n n 39 di 3 5 di tert butyl 4 hydroxyphenyl propionyl hexamethylenediamine n n 39 bis u03b2 3 5 di t butyl 4 hydroxyphenyl propionyl hydrazine 1 10 esters of u03b2 3 5 di tert butyl 4 hydroxyphenyl propionic acid with monohydric or polyhydric alcohols such as for example with methanol.