| 摘要 |
Compositions comprising an organic material liable to thermal, oxidative and/or actinic degradation and at least one compound of the formula (I) <IMAGE> (I) are described in which R is hydrogen, C1-C18alkyl, C1-C18alkoxy, halogen, nitro, phenyl-C1-C4alkoxy, C2-C18alkanoyl, benzoyl, (C1-C6alkyl)benzoyl, C2-C18alkenoyl, -N(R7)(R7a), -OH or -CO-A, R1 has the same possibilities of meaning as R, R2 is hydrogen or C1-C4alkyl and R3 is hydrogen or halogen, A is hydroxyl, C1-C18alkoxy, C5-C12cycloalkoxy, benzyloxy or benzyloxy substituted by C1-C4alkyl and/or halogen, -N(R7)(R7a), -NH-NH-R8 or leads to di-, tri- or tetrameric ring systems containing rings of the formula I via a bridging member, and in which R5 and R6 form the completion of a fused, substituted or unsubstituted, mononuclear to trinuclear ring system comprising at least one N, O or S atom as a ring member. Some of these compounds are novel. They are particularly suitable for the stabilization of lubricating oils, metal processing fluids and hydraulic fluids, and of thermoplastics.
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