Piperidine derivatives in which two or three piperidine residues each substituted at the 2- and the 6-position by two methyl groups or by one methyl group and one ethyl group, the piperidine residues being attached by means of substituted alkylene groups, by means of polyoxyalkylene groups (whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups), by means of substituted isocyanurate groups or by means of glyceryl groups, and acid addition salts thereof are valuable as stabilizers for synthetic polymers.
2-和6-位各被两个甲基基团或一个甲基基团和一个乙基基团取代的两个或三个
哌啶残基的
哌啶衍
生物,所述
哌啶残基通过取代的烷基,聚氧烷基(其氧烷链可以被一个或多个苯基或环己基中断),取代的
异氰酸酯基或
甘油基连接,以及其酸加成盐,在合成聚合物的稳定剂方面具有重要价值。