N-substituted hindered amine stabilizers

Abstract From the Canadian patent

Hindered amines based on various 2,2,6,6-tetraalkylated nitrogen-containing heterocyclic moieties wherein the hindered nitrogen atom on the ring is substituted with OR1 substituents and the 4-position of the ring is substituted with a variety of groups, are effective as light stabilizers in diverse substrate systems. Some of them are new compounds. These hindered amines contain the group, wherein R is hydrogen or methyl and R1 is C1-C18 alkyl C2-C18, alkenyl, C2-C18 alkinyl, C5-C12 cycloalkyl C6-C10 bicycloalkyl, C5-C8 cycloalkenyl C6-C10 aryl, C7-C9 aralkyl or C7-C9 aralkyl substituted by C1-C4 alkyl or phenyl.