| abstract |
Disclosed are compounds of the formula (I) wherein R1 is C1-4 n-alkyl, R2 is C4-18 tert-alkyl or alpha, alpha-dimethylbenzyl, R3 is C1-28 alkyl, and R4 s methyl or ethyl, with the proviso that the -CHR3R4 group contains at least 4 carbon atoms, are suitable for stabilising organic material which is susceptible to degradation induced by heat, oxidation or actinic light. |