| abstract |
Compounds of formula I ##STR1## wherein R 1 is hydrogen, alkyl or alkoxy, --A 1 --R 2 --N(R 3 )-- and --X 1 --(X 2 --X 3 ) m -- are selected linking groups, Y 1 and Y 2 are selected terminal moieties and n is 1 to 50, are effective light, heat and oxidation stabilizers for a variety of organic materials. |