申请人:The United States of America as represented by the Administrator of the
公开号:US05410012A1
公开(公告)日:1995-04-25
Novel poly(N-arylenebenzimidazole)s (PNABIs) are prepared by the aromatic nucleophilic displacement reaction of novel di(hydroxyphenyl-N-arylene benzimidazole) monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The polymerizations are carried out in polar aprotic solvents such as N-methyl-2-pyrrolidinone or N,N-dimethylacetamide using alkali metal bases such as potassium carbonate at elevated temperatures under nitrogen. The di(hydroxyphenyl-N-arylenebenzimidazole) monomers are synthesized by reacting phenyl-4-hydroxybenzoate with bis(2-aminoanilino)arylenes in diphenylsulfone. Moderate molecular weight PNABIs of new chemical structures were prepared that exhibit a favorable combination of physical and mechanical properties. The use of the novel di(hydroxyphenyl-N-arylenebenzimidazole)s permits a more economical and easier way to prepare PNABIs than previous routes.
新型聚酰亚胺类化合物(PNABIs)通过新型双(羟基苯基-N-芳基苯并咪唑)单体与活性芳香二卤化物或活性芳香二硝基化合物进行芳香亲核取代反应而制备。聚合反应在极性无水溶剂(如N-甲基-2-吡咯烷酮或N,N-二甲基乙酰胺)中进行,使用碱金属基(如碳酸钾)在氮气下高温进行。双(羟基苯基-N-芳基苯并咪唑)单体是通过将苯基-4-羟基苯甲酸与双(2-氨基苯基)芳烃在二苯基砜中反应合成的。制备了新型化学结构的中等分子量PNABIs,具有良好的物理和机械性能的有利组合。使用新型双(羟基苯基-N-芳基苯并咪唑)单体比以前的方法更经济,更容易制备PNABIs。