Novel 7,7,9,9-tetra-substituted-1,3,8-triazaspiro\x9b4.5!decane-2,4-diones \n' having an alkyl or allyl group at either the 6- or the 10- position are useful for the stabilization of polymers against photo- and thermal- deterioration.
具有烷基或
烯丙基基团位于6-或10-位置的新型7,7,9,9-四取代-1,3,8-三
氮杂螺[4.5]
十二烷-
2,4-二
酮,对稳定
聚合物抵抗光热降解具有有用作用。