abstract |
Compounds containing substituted piperidine groups, of the general formula (I) <IMAGE> (I) in which n is e.g. 1, 2 or 3, R1 is e.g. hydrogen or methyl, R2 is e.g. ethylene or trimethylene and if n is 1, A is e.g. hydrogen, -COOC18H37-n or -COC11H23-n, if n is 2, A is e.g. CO(CH2)4OC or <IMAGE> and if n is 3, A is e.g. <IMAGE> are effective stabilizers for organic materials, especially synthetic polymers, which are subject to the action of light, heat and oxidation. |