| 摘要 |
There are disclosed compositions comprising a) an organic material which is susceptible to oxidative, thermal and/or light-induced degradation, and b) at least one compound of formula I or/and II <CHEM> wherein Q is a direct bond or -CR1R2- wherein each R1 and R2 independently represents hydrogen, straight chain alkyl of 1 to 18 carbon atoms, branched chain alkyl of 1 to 12 carbon atoms, phenyl, tolyl or anisyl; each Y1, Y2, Y3, Y4, Z2, Z3, Z4 and Z5 independently represents hydrogen, a straight or branched chain alkyl of 1 to 18 carbon atoms, bicycloalkyl of 7 to 10 carbon atoms, phenyl, benzyl, 1-phenylethyl, cyclohexyl, 1-methylcyclohexyl, cyano, halogen, nitro, trifluoromethyl, hydroxy, amino, alkanoyl of 2 to 18 carbon atoms, alkoxy of 1 to 18 carbon atoms or E1E2E3Si- where E1, E2 and E3 are independently hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; each Z independently represents alkyl of 1 to 18 carbon atoms, phenyl or said phenyl mono- or di-substituted by alkyl of 1 to 8 carbon atoms or 1-phenylethyl; or by cyano, halogen, nitro, trifluoromethyl, hydroxy, amino, alkanoyl of 2 to 18 carbon atoms, alkoxy of 1 to 18 carbon atoms or E1E2E3Si- where E1, E2 and E3 are independently hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; and Z6 and Z7 are independently hydrogen, a straight or branched chain alkyl of 1 to 18 carbon atoms, phenyl, said phenyl substituted by alkyl of 1 to 8 carbon atoms; or are independently benzyl, 1-phenylethyl, cyclohexyl, 1-methylcyclohexyl, cyano, halogen, -NR3R4 or -SR5 where R3, R4 and R5 are independently hydrogen, a straight or branched chain alkyl of 1 to 18 carbon atoms, phenyl, benzyl, cyclohexyl or 1-methylcyclohexyl.
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