| 摘要 |
2,2,6,6-tetraalkyl-4-piperidyl ketones and ketals are provided, useful as stabilizers for organic polymeric materials, and having the general formula: <IMAGE> wherein n are each 0 or 1 and are each the same; R is selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms, and acryl <IMAGE> R' being alkyl having from one to about eighteen carbon atoms; R1, R2, R3, R4 and R5 are selected from the group consisting of hydrogen and alkyl having from one to about eighteen carbon atoms; R6 is selected from the group consisting of hydrogen and O.; Y is selected from the group consisting of a carbon-to-carbon bond-, oxy -O-; alkylene having from one to about three carbon atoms, and alkyl-substituted alkylene, the alkylene having from one to about three carbon atoms, the alkyl having from one to about six carbon atoms; and Z is selected from the group consisting of: <IMAGE>
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