| abstract |
Compounds of the formula: ##STR1## wherein R is hydrogen or alkyl (C 1 -C 8 ), R' is hydrogen, hydroxyl or lower alkoxy (C 1 -C 8 ); R" is alkyl (C 1 -C 20 ), alkylene (C 2 -C 12 ), cycloalkyl, wherein the alicyclic ring contains 5- or 6-carbon atoms, cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, alkenyl (C 3 -C 20 ), arylene or aralkylene; n is an integer from 1 to 4, are useful for stabilizing polyolefin polymer against photo and thermal degradation. |