Oligoesters containing polyalkylpiperidine groups

Claim 1

An oligomeric ester of the formula I or II ##STR23## in which n has a value from 1 to 3, R 1 and R 2 are divalent organic radicals at least one of which contains a polyalkylpiperidine radical, R 1 is C 2 -C 18 -alkylene, C 4 -C 8 -alkenylene, C 4 -C 20 -monooxaalkylene, C 4 -C 20 -polyoxaalkylene, C 5 -C 8 -cycloalkylene, C 7 -C 10 -cycloalkane-dialkylene, C 8 -C 20 -arene-dialkylene or a divalent radical of the formulae ##STR24## in which m is 2 to 10, X is a group --O-- or --NR 5 --, Y is C 2 -C 12 -alkylene, C 4 -C 12 -alkylene which is interrupted by one or two --O-- or --NH-- groups, cyclohexylene, cyclohexane dimethylene, C 6 -C 12 -arylene or -phenylene-Z-phenylene- in which Z is --O--, --CH 2 --, or --SO 2 --, R 2 is a direct bond, C 1 -C 18 -alkylene, C 2 -C 6 -alkenylene, C 5 -C 8 -cycloalkylene, C 5 -C 8 -cycloalkenylene, C 6 -C 12 -arylene, C 7 -C 12 -aralkylene or a divalent radical of the formulae ##STR25## in which p is 1 or 2, E is hydrogen, C 1 -C 8 -alkyl, cyclohexyl, benzyl or an acyl group of the formula R 7 --CO--, R 8 --O--CO-- or (R 9 )(R 10 )N--CO-- and E' is a group R 11 O-- or (R 12 )(R 13 )N-- and wherein R 3 is hydrogen, C 1 -C 6 -alkyl, C 2 -C 7 -alkoxymethyl, phenoxymethyl or tolyloxymethyl, R 4 is hydrogen, C 1 -C 8 -alkyl, C 2 -C 8 -alkanoyl, C 3 -C 6 -alkenoyl, C 7 -C 12 -phenylalkyl or C 3 -C 5 -alkenylmethyl, R 5 is hydrogen, C 1 -C 12 -alkyl, cyclohexyl, phenyl, benzyl, phenylethyl, C 2 -C 8 -alkanoyl, C 3 -C 6 -alkenoyl or benzoyl, R 6 is C 2 -C 12 -alkylene, C 4 -C 8 -alkenylene or xylylene, R 7 is C 1 -C 12 -alkyl, C 2 -C 5 -alkenyl, C 5 -C 8 -cycloalkyl, C 6 -C 10 -aryl, C.sub. 7 -C 12 -phenylalkyl or a group of the formula ##STR26## R 8 is C 1 -C 12 -alkyl, allyl, cyclohexyl or phenyl, R 9 is hydrogen, C 1 -C 8 -alkyl, allyl, cyclohexyl, phenyl or C 7 -C 10 -alkylphenyl and R 10 is C 1 -C 8 -alkyl, allyl, cyclohexyl, phenyl or C 7 -C 10 -alkylphenyl, or R 9 and R 10 , together with the N atom to which they are attached, form a pyrrolidine, piperidine, morpholine, 4-methylpiperazine or 4-(2-cyanoethyl)piperazine ring, R 11 is C 1 -C 12 -alkyl, C 3 -C 5 -alkenylmethyl, C 5 -C 8 -cycloalkyl, phenyl, C 7 -C 10 -alkylphenyl, C 7 -C 12 -phenylalkyl, C 3 -C 12 -alkoxyalkyl, a group --(CH 2 CH 2 O) m --CH 3 , a group of the formula IV or a group of the formula V ##STR27## R 12 is C 1 -C 12 -alkyl, allyl, cyclohexyl, phenyl, benzyl, C 3 -C 12 -alkoxyalkyl, C 4 -C 12 -dialkylaminoalkyl, a group of the formula IV or a group of the formula VI ##STR28## and R 13 is hydrogen, C 1 -C 12 -alkyl, allyl, cyclohexyl or a group of the formula IV, and to co-oligomers thereof, said oligomeric ester being formed by the polycondensation of a dicarboxylic acid ester and a diol, one of which components being in a molar excess of 33 to 100% of the other.