| abstract |
Compounds of formula I, wherein R¹ and R² are independently methyl, ethyl, isopropyl, isobutyl, C₅-C₂₀-alkyl branched on the α-C atom, unsubstituted or substituted by C₁-C₄-alkyl C₅-C₈-cycloalkyl, benzyl or phenyl and R³ is methyl or Ethyl means, on the condition that the compound 3,3ʹ-dihydroxy-2,2ʹ, 4,4ʹ, 6,6ʹ-hexamethyl-diphenylmethane is excluded, are suitable for stabilizing organic material against thermal, oxidative and / or actinic degradation . |