The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.
本发明涉及一种从其相应的立体位阻型亚硝基自由基通过与醛和
过氧化氢反应制备特定立体位阻型亚硝基醚的新工艺。此亚硝基醚的形成可以从不同的起始亚硝基自由基中进行,并随后进一步反应以得到所需的化合物。通过此工艺制备的化合物可用作聚合物稳定剂,以防止聚合物受到光、氧和/或热的有害影响,并可用作聚合物的阻燃剂。