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    • 96. 发明授权
    • Polymers containing both imidazole and imidazolone structural units
    • 含有咪唑和咪唑啉酮结构单元的聚合物
    • US5120825A
    • 1992-06-09
    • US631557
    • 1990-12-21
    • Rohitkumar H. VoraPaul N. Chen, Sr.
    • Rohitkumar H. VoraPaul N. Chen, Sr.
    • C08G73/06C08G73/18
    • C08G73/0672C08G73/18
    • The present invention provides for hybrid polybenzimidazole and polybenzimidazolone polymers which are characterized as containing both imidazole and imidazolone structural units in the polymer chain. These polymers are characterized as containing at least one recurring monomer unit containing the structure of the formula: ##STR1## wherein Ar is a tetravalent aromatic moiety derived from an aromatic tetraamine and Ar.sub.1 is a trivalent aromatic moiety derived from a trifunctional acid, an acid anhydride or amine-reactive derivatives thereof, said polymers further characterized by an inherent viscosity of at least about 0.01 dl/g measured as a 0.5% solution in N-methyl pyrrolidone at 25.degree. C.The polymers of this invention exhibit many of the advantageous properties of both polybenzimidazole and polybenzimidazolone polymers. They are characterized as being extremely resistant to chemical attack such as by solvents, acids and bases. Their high thermal stability and excellent electrical properties (low dielectric constant) render them useful in electrical and electronic applications.
    • 本发明提供了混合聚苯并咪唑和聚苯并咪唑酮聚合物,其特征在于在聚合物链中含有咪唑和咪唑啉酮结构单元。 这些聚合物的特征在于含有至少一个含有下式结构的重复单体单元:其中Ar是衍生自芳族四胺的四价芳香部分,Ar 1是衍生自三官能酸的三价芳族部分,酸酐 或其胺反应性衍生物,所述聚合物的特征还在于其在25℃下作为N-甲基吡咯烷酮中的0.5%溶液测量的至少约0.01dl / g的特性粘度。本发明的聚合物显示出许多有利的性质 的聚苯并咪唑和聚苯并咪唑酮聚合物。 它们的特征是具有极强的耐化学腐蚀性,如溶剂,酸和碱。 它们的高热稳定性和优异的电性能(低介电常数)使其在电气和电子应用中非常有用。