Abstract: The invention relates to novel polyalkyl piperidine derivatives and use thereof as stabilizers for polymers.More particularly the invention relates to compounds having the general formula I ##STR1## where R denotes hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl or aryl; R.sub.1 and R'.sub.1 denote hydrogen, alkyl, alkenyl or aralkyl;R.sub.2 and R'.sub.2 denote hydrogen or methyl;X and X' denote oxygen or NR.sub.3 ;R.sub.3 denotes hydrogen, alkyl, cycloalkyl or aralkyl;A and A' denote (CH.sub.2).sub.m X";m equals 2 or 3;X" has the same meaning as X and X', and n can be 0 or 1.

Abstract: The invention relates to novel polypiperidine compounds which give polymer materials high stability against oxidation and degradation when exposed to light, and to the process for the production thereof.