发明授权
- 专利标题： Di(hydroxyphenyl)-benzimidazole monomers
- 专利标题（中）： 二（羟基苯基） - 苯并咪唑单体
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申请号： US941816申请日： 1992-09-08
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公开(公告)号： US5245044A公开(公告)日： 1993-09-14
- 发明人: John W. Connell , Paul M. Hergenrother , Joseph G. Smith
- 申请人： John W. Connell , Paul M. Hergenrother , Joseph G. Smith
- 申请人地址： DC Washington
- 专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人地址： DC Washington
- 主分类号： C07D235/18
- IPC分类号： C07D235/18 ; C08G73/18
摘要：
Di(hydroxyphenyl)benzimidazole monomers were prepared from phenyl-4-hydroxybenzoate and aromatic bis(o-diamine)s. These monomers were used in the synthesis of soluble polybenzimidazoles. The reaction involved the aromatic nucleophilic displacement of various di(hydroxyphenyl)benzimidazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds in the presence of an alkali metal base. These polymers exhibited lower glass transition temperatures, improved solubility, and better compression moldability over their commercial counterparts.
公开/授权文献
- US5889688A Frequency domain kernel phase processor 公开/授权日：1999-03-30
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