Polymeric compounds containing piperidine radicals and their use as stabilizers for synthetic polymers

Claim 1

A compound of the formula (I) ##STR23## in which R 1 and R 2 can be identical or different and are hydrogen, C 1 -C 18 -alkyl, C 2 -C 12 -alkyl substituted by --OH, a C 1 -C 18 -alkoxy group or a C 2 -C 18 -dialkylamino group, C 3 -C 18 -alkenyl, C 5 -C 18 -cycloalkyl, C 6 -C 18 -aryl, C 7 -C 18 -aralkyl or a radical of the formula ##STR24## where R 6 is hydrogen, C 1 -C 12 -alkyl, C 3 -C 12 -alkenyl or -alkynyl, C 7 -C 12 -aralkyl or C 1 -C 12 -acyl, or R 1 and R 2 , together with the nitrogen atom to which they are bonded, are a heterocylic radical, such as pyrrolidin-1-yl, piperidin-1-yl, hexahydroazepin-1-yl, morpholin-4-yl or 4-methylpiperazin-1-yl, R 3 and R 5 can be identical or different and are radicals of the formula (III), (IV), (V) or (VI) ##STR25## and R 5 additionally can be radical of formula VII ##STR26## wherein R 7 is hydrogen, C 1 -C 6 -alkyl or phenyl, X is a group --O--CH 2 ) n O-- or --N(R 8 )--C(O)--CH 2 ) n C(O)--N(R 8 )--, n is a number between 1 and 6, R 8 has the same meaning as R 1 or R 2 and Y is C 2 -C 12 -alkylene, C 3 -C 12 -alkylene substituted by one hydroxyl or containing an oxgen atom in the chain, C 4 -C 12 -alkenylene or C 8 -C 12 aralkylene, R 4 is C 2 -C 18 -diacyl or a radical of the formula (VIII) ##STR27## in which R 1 and R 2 are as defined above, a is a number between 0.2 and 1, and b is a number between zero and 0.8; the compounds of the formula (I) have a number average molecular weight Mn between 1,000 and 20,000.