A hindered piperidine compound represented by the formula of ##STR1## wherein R.sup.1 is a 2,2,6,6-tetramethyl-4-piperidyl group of which the N-position is substituted or not, a hydrogen atom, a C.sub.1 -C.sub.18 alkyl group which may contain a cyclic portion, or a C.sub.7 -C.sub.18 arylalkyl group, R.sup.2 is a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group which may contain a cyclic portion, a C.sub.1 -C.sub.18 alkyloxy group which may contain a cyclic portion, or a hydroxyl group, and n is an integer of 2 to 8, effectively stabilizes organic materials having a property to deteriorate by the action of light. A method for producing the compound represented by the above formula is also disclosed.
                            本发明提供了一种以公式##STR1##表示的受阻胺基化合物,其中R.sup.1是2,2,6,6-四甲基-4-
哌啶基团,其N-位置被取代或未被取代,氢原子,C.sub.1-C.sub.18烷基,其可能包含一个环状部分,或C.sub.7-C.sub.18芳基烷基,R.sup.2是氢原子,C.sub.1-C.sub.10烷基,其可能包含一个环状部分,C.sub.1-C.sub.18烷氧基,其可能包含一个环状部分,或羟基,并且n是2到8的整数,能够有效稳定有光降解性质的有机材料。本发明还公开了一种制备上述公式所表示的化合物的方法。