The present invention relates to novel compounds corresponding to the formula:
wherein R₁ and R₄ may be the same or different, and each is a lower alkyl radical; R₂ and R₃ may be the same or different, and each is a substituted piperidine radical; M is equal to the total number of monomer units in the polymer chain, and is of a magnitude sufficient to provide a polymer having a molecular weight of at least 500; W is equal to at least 0.5, X is equal to at least 0.1 but not greater than 0.2, Y is equal to at least 0.1, Z is equal to at least 0.05 but not greater than 0.2, and W plus X plus Y plus Z is equal to 1.
These novel compounds are useful as stabilizers for a wide variety of organic materials and are prepared by transesterification of a suitable acrylate-methacrylate copolymer.
本发明涉及与式相应的新型化合物:
其中R₁和R₄可以相同或不同,且各自为低级烷基;R₂和R₃可以相同或不同,且各自为取代的
哌啶基;M等于聚合物链中单体单元的总数,其大小足以提供分子量至少为500的聚合物;W等于至少0.5,X 至少等于 0.1 但不大于 0.2,Y 至少等于 0.1,Z 至少等于 0.05 但不大于 0.2,W 加 X 加 Y 加 Z 等于 1。
这些新型化合物可用作各种有机材料的稳定剂,并通过适当的
丙烯酸酯-
甲基丙烯酸酯共聚物的酯交换反应制备。