发明授权
US4107139A 1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against UV light with these compounds 失效
1-氧杂-4,8-​​二氮杂螺[{8,45} {9癸烷和用这些化合物对UV光进行稳定的聚合物

1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against UV
light with these compounds
摘要:
New 1-oxa-4,8-diazaspiro[4,5]decanes are prepared by reacting a dimethyl-dialkyl-piperidone with an .alpha.-hydroxyamide in the presence of a condensation catalyst. The compounds can be used as UV stabilizers for polymers.
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