| abstract |
Isoindolinone compounds as stabilisers for organic materials Abstract Compositions comprising an organic material liable to thermal, oxidative and/or actinic degradation and at least one compound of the formula (I) (I), are described in which R is hydrogen, C1-C18alkyl, C1-C18alkoxy, halogen, nitro,phenyl-C1-C4alkoxy, C2-C18alkanoyl, benzoyl, (C1-C6alkyl)benzoyl, C1C18alkenoyl,-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 stabilisation of lubricating oils, metal processing fluids and hydraulic fluids, and of thermoplastics. |