| abstract |
Use of 3-amino-2(benzoylamino)acrylic acid esters (I) in which R<1> is C1 to C20-alkyl which may be interrupted by one or more non-adjacent O atoms or NR<5> groups and may bear one or more hydroxyl groups, C2 to C20-alkenyl, C5 to C8-alkenyl, C5 to C8-cycloalkyl or phenyl which may be substituted by one to three C1 to C4-alkyl groups, C1 to C4-alkoxy groups, C1 to C4-alkoxy groups, halogen atoms, hydroxyl groups, phenoxy groups, phenyl radicals, cyano groups or C1 to C4-alkoxy carbonyl groups; R<2> is hydrogen or C1 to C20-alkyl; R<3> is a five or six-component unsaturated or saturated heterocyclic ring with up to three hetero atoms from the group nitrogen, oxygen and sulphur, which is additionally benzannulated and may be substituted by one to three C1 to C4-alkyl groups, C1 to C4-alkoxy groups, halogen atoms, hydroxyl groups, phenoxy groups, phenyl radicals, cyano groups or C1 to C4-alkoxycarbonyl groups; R<4> is hydrogen, C1 to C12-alkyl, C1 to C12-alkoxy, halogen, hydroxyl, phenoxy, phenyl, cyano or a grouping of the formula -CO-OR<5>, -CO-R<5>, -O-CO-R<5> of -NH-CO-R<5>; R<5> is C1 to C12-alkyl, C5 to C8-cycloalkyl or phenyl; and n is 1 to 3, as stabilisers for organic materials. |