Isoindolinone compounds as stabilizers for organic materials

US5250592A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventor

• Peter Nesvadba · Marly, CH

Key dates

• Filing date: Dec 23, 1992
• Grant date: Oct 5, 1993
• Expiry date: Dec 23, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3417
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compositions comprising an organic material liable to thermal, oxidative and/or actinic degradation and at least one compound of the formula (I) ##STR1## are described in which R is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.18 alkoxy, halogen, nitro, phenyl-C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.18 alkanoyl, benzoyl, (C.sub.1 -C.sub.6 alkyl)benzoyl, C.sub.2 -C.sub.18 alkenoyl, --N(R.sub.7)(R.sub.7a), --OH or --CO-A, R.sub.1 has the same possibilities of meaning as R, R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl and R.sub.3 is hydrogen or halogen, A is hydroxyl, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.12 cycloalkoxy, benzyloxy or benzyloxy substituted by C.sub.1 -C.sub.4 alkyl and/or halogen, --N(R.sub.7)(R.sub.7a), --NH--NH--R.sub.8 or leads to di-, tri- or tetrameric ring systems containing rings of the formula I via a bridging member, and in which R.sub.5 and R.sub.6 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 flu…