发明授权
US5302729A Dibenzo crown monomers and polymers formed therefrom 失效
二苯基冠单体和由其形成的聚合物

Dibenzo crown monomers and polymers formed therefrom
摘要:
Novel bis(extraannular functionally-substituted phenylene) crown compounds, useful as chelating agents or in the synthesis of condensation polymers containing large semi-rigid macrocycles in the polymer backbone, are described. A broad range of functional groups (preferably in the 5-position) can be used in the 1,3-phenylene varieties. Carboxy functional groups are used in certain novel 1,2-phenylene crowns.
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