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 OR.sub.1 substituents and the 4-position of the ring is substituted with a variety of groups, are effective as light stabilizers in diverse substrate systems.
The present invention relates to an intermediate of the formula
, wherein R1 is linear C1-C7alkyl, and
to a process for the preparation of said intermediate.
Further, the present invention relates to a compound of the formula (A) which can be prepared by using said intermediate, and to an organic material stabilized with said compound.
wherein
X is a group of the formula (A-1) or (A-2)
and the radicals R1 are independently of one another linear C1-C7alkyl;
Y1 is C10-C20alkyl; and
Z1 is a direct bond or C2-C12alkylene uninterrupted or interrupted by sulfur.