Isoindolo[2, 1-a]quinazoline derivatives for stabilization of organic materials

Abstract

The present invention relates to a composition, which comprises a) an organic material susceptible to oxidative, thermal or light-induced degradation, which is a polymer, an oligohydroxy compound, a wax, a fat or a mineral oil, with the proviso that the polymer is not a polypeptide, agar-agar or a component of agar-agar and the oligohydroxy compound is not glucose or a component of agar-agar; and b) a compound of formula (I) n is 1, 2, 3 or 4; when n is 1, Ris H, C-C-alkyl, C-C-cycloalkyl, C-C-aryl, which is unsubstituted or substituted by C-C-alkyl, C-C-alkoxy, halogen or one phenyl, C-C-aralkyl, C-C-alkenyl, C-C-alkinyl, OH, C-C-alkyloxy, C-C-cycloalkyloxy, C-C-aryloxy, C-C-aralkyloxy, hydroxy-C-C-alkyl, carboxy-C-C-alkyl, C-C-alkoxycarbonyl-C-C-alkyl, C-C-alkyl, which is interrupted by one or more oxygen atoms, C-C-alkyl, which is interrupted by one sulfur atom, or NR'R′; when n is 2, Ris C-C-alkane-diyl, C-C-arylene, C-C-cycloalkane-bis-(C-C-alkylene), C-C-arene-bis-(C-C-alkylene), C-C-alkane-diyl, which is interrupted by one or more oxygen atoms, C-C-alkane-diyl, which is interrupted by one or more —NH—, —N(C-C-alkyl)- or —N(hydroxy-C-C-alkyl)-, piperazine-N,N′-bis-(C-C-alkylene) or C-C-alkane-diyl, which is interrupted by one sulfur atom; Rto Rand Rto Rare each independently from each other H, C-C-alkyl, C-C-cycloalkyl, C-C-alkenyl, C-C-alkoxy, C-C-alkylsulfanyl, hydroxy- C-C-alkyl, halogen, NR″R″, NO, CN, phenyl, phenyloxy or Rand Ror Rand Ror Rand Ror Rand Ror Rand Ror Rand Rare linked together to form a five- or 6-membered alicylic, aromatic or heterocyclic ring together with their 2 corresponding carbons atoms, to which they are attached.