| 摘要 |
The invention relates to polyethers containing recurring units of the formula I <IMAGE> (I) in which A is -CH2- or -CO-, and, when A is methylene, E is <IMAGE> and when A is carbonyl, E is <IMAGE> R1 is hydrogen, and R2 is likewise hydrogen or an aromatic, aliphatic or araliphatic carbonyloxy radical or a corresponding radical of an ether or tertiary amine, or R1 and R2 together are a=O substituent or together with the carbon atom to which they are bonded are a five- or six-membered, substituted, oxygen- and/or nitrogen-containing heterocyclic ring, and R17 is a hydrocarbon radical having a maximum of 18 carbon atoms. The polyethers according to the invention can advantageously be employed for the stabilization of organic material against the harmful effect of light, oxygen and/or heat.
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