| abstract |
Novel compounds of formula (1) <IMAGE> (1) wherein R1 is hydrogen, alkyl or alkaryl, R2 to R5 are independently hydrogen, chloro, alkyl phenylalkyl, aryl, cycloalkyl, alkoxy, alkylthio, hydroxy, amino or substituted amino, R6 is hydrogen, R7 and R8 are hydrogen or alkyl, R9 and R9' are hydrogen, alkyl or phenyl, and R10 is hydrogen or alkyl, are disclosed as stabilisers for protecting organic materials against thermal, oxidative or light-induced degradation. |