Piperidine compounds for use as light stabilizers, heat stabilizers and oxidation stabilizers for organic material

Claim 1

A compound of the formula (I) ##STR56## in which n is 1 or 2, R 1 is hydrogen, O.sup.., OH, NO, CH 2 CN, C 1 -C 8 -alkyl, allyl, benzyl, OH-monosubstituted C 2 -C 4 -alkyl, C 1 -C 18 -alkyloxy, C 5 -C 12 -cycloalkyloxy or C 1 -C 8 -acyl, R 2 is C 1 -C 18 -alkyl, C 5 -C 12 -cycloalkyl, C 7 -C 12 -phenylalkyl, C 1 -C 12 -alkoxy-monosubstituted C 2 -C 4 -alkyl, tetrahydrofurfuryl or a group of the formula (II) ##STR57## in which R 1 is as defined above, and, when n=1, A is a group of the formula (III) ##STR58## in which R 1 is as defined above, R 3 is as defined for R 2 and p is an integer from 1 to 5, or, when n=2, A is a group of the formula (IV), (V), (VI) or (VII) ##STR59## in which p is as defined above, R 4 is as defined above for R 2 , R 5 is C 2 -C 12 -alkylene, C 6 -C 15 -cycloalkylene or xylylene, Z is a group of the formula (VIII) ##STR60## in which R 1 , R 2 and p are as defined above, R 6 and R 8 which are identical or different are C 1 -C 8 -alkyl, cyclohexyl, benzyl or a group of the formula (II) and R 7 is C 2 -C 12 -alkylene, C 6 -C 15 -cycloalkylene or xylylene, or the group ##STR61## is a heterocyclic radical of the formula (IX) or (X) ##STR62## in which each R 9 independently is hydrogen or methyl, r is zero or 1 and R 2 is as defined above.