Amino compounds as processing stabilizers for thermoplastic materials

A process for stabilizing thermoplastic materials during processing, which comprises using compounds of the formula (I) or (II) ##STR20## where m is 2 or 3,

• n is an integer from 1 to 6,
• R.sup.1 and R.sup.2 are, independently of one another, hydrogen, C.sub.1 - to C.sub.18 -alkyl, C.sub.3 - to C.sub.8 -alkenyl or C.sub.5 - to C.sub.12 -cycloalkyl, R.sup.4 and R.sup.5 are, independently of one another, hydrogen, C.sub.1 - to C.sub.18 -alkyl, C.sub.3 - to C.sub.8 -alkenyl, C.sub.5 - to C.sub.12 -cycloalkyl or C.sub.7 - to C.sub.12 -phenylalkyl, in which the phenyl ring is unsubstituted or substituted by up to 3 C.sub.1 - to C.sub.12 -alkyl or C.sub.1 - to C.sub.12 -alkoxy groups,
• X is oxygen or NR.sup.3,
• R.sup.3 is an R.sup.1 radical or a group of the formula ##STR21## B completes a 3- to 12-membered saturated or unsaturated mononuclear or polynuclear heterocycle, which from 0 to 2 additional hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, wherein the further nitrogen atoms are unsubstituted or carry as substituents hydrogen, C.sub.1 - to C.sub.8 -alkyl or a group of the formula ##STR22## and for the heterocycle in addition to contain up to 3 carbonyl groups, C.sub.1 - to C.sub.8 -alkyl, phenyl, C.sub.7 - to C.sub.12 -phenylalkyl or C.sub.5 - to C.sub.12 -cycloalkyl substituents, and
• A when n=1 is hydrogen, C.sub.3 - to C.sub.24 -alkenyl, C.sub.1 - to C.sub.60 -alkyl, which is uninterrupted or interrupted by up to 29 oxygen atoms or NR.sup.3 and is unsubstituted or substituted by up to 6 hydroxyl or amino groups, C.sub.3 - to C.sub.12 -cycloalkyl, which is unsubstituted or substituted by up to 3 C.sub.1 - to C.sub.12 -alkyl radicals, C.sub.7 - to C.sub.20 -bicycloalkyl or a group of the formula ##STR23## A when n>1 is C.sub.2 - to C.sub.24 -alkylene, C.sub.4 - to C.sub.60 -alkylene, which is uninterrupted or interrupted by up to 5 NR.sup.3 groups or by up to 28 oxygen atoms, C.sub.3 - to C.sub.12 -alkylene, which carries up to 6 hydroxyl, C.sub.1 - to C.sub.4 -alkoxy, amino or C.sub.1 -to C.sub.3 -hydroxyalkyl groups, C.sub.5 - to C.sub.12 -cycloalkylene or C.sub.7 -to C.sub.24 -bicycloalkylene or polycycloalkylene, and when n>1 the alkylene radicals are divalent or higher valence, as processing stabilizers for thermoplastic materials.