| 摘要 |
Stabilizers for organic polymeric materials are provided, comprising a 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester having the general formula: <IMAGE> wherein: R1 is selected from the group consisting of <IMAGE> +TR <IMAGE> Y is selected from the group consisting of hydrogen and O.; R6 is lower alkyl having from one to two carbon atoms; n is selected from the group consisting of 1, 2, 3 and 4; and Z is an organic radical having a valence from 1 to 4, the valence positions being taken by <IMAGE> groups, and from one to about twenty carbon atoms, and selected from the group consisting of alkyl, alkenyl, alkylene, alkenylene, alkylidene; aryl, arylene, aralkyl, aralkylene, aralkylidene, alkaryl, alkarylene, alkarylidene; heterocycloalkyl, heterocycloalkylene, heterocycloalkylidene; cycloalkyl, cycloalkenyl, cycloalkylene, cycloalkenylene, cycloalkylidene, alkcycloalkyl, alkcycloalkenyl, alkcycloalkenylene, alkcycloalkylene, cycloalkalkylene, cycloalkalkyl, cycloalkalkenyl, and cycloalkalkenylene, and amino- and hydroxy-substituted such radicals; a phosphonic acid ester, and a phenolic antioxidant.
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