| 摘要 |
A description is given of a process for stabilising an organic polymer against o zone in the ambient air, which comprises adding to the polymer as stabiliser a monomeric ste rically hindered piperidine compound, or an oligomeric or polymeric sterically hindered piperidine compound containing one or several triazine units, or a secondary sterically hin dered piperidine compound, the piperidine compound containing in any case at least one unit of formula I (see fig. I), wherein G is hydrogen or methyl, and G1 and G2 are hydrogen, methyl or, taken to gether, oxygen. With this process it is possible to make a more accurate prediction of the servi ce time of the polymer and it helps to avoid unnecessarily high dosages of the stabiliser.
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