abstract |
Synthetic polymers which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizer at least a compound of the formula I n n nwhereinn R 1 and R 2 are each independently of one another hydrogen or C 1 -C 8 alkyl, R 3 and R 4 are each independently of one another C 1 -C 12 alkyl, and R 5 is C 1 -C 7 alkyl. |