| 摘要 |
PURPOSE:To facilitate the production of a high-polymerization degree aromatic polyketone, by reacting diphenyl ether with an aromatic dicarboxylic acid dihalide in the presence of a Lewis acid in an aprotic organic solvent at a temperature within a specified range. CONSTITUTION:Diphenyl ether is reacted, with an aromatic dicarboxylic acid dihalide, e.g., terephthaloyl or isophthaloyl dichloride, in the presence of a Lewis acid, e.g., aluminum chloride or tin tetrachloride, under stirring in an aprotic organic solvent, e.g., ethylene chloride or toluene, at a temperature >=-10 deg.C or preferably at a temperature of 0-35 deg.C. In this way, it becomes possible to conduct the reaction within an industrially applicable temperature range and to obtain an aromatic polyketone having a degree of polymerization markedly higher than those of the polymers obtained by the conventional processes. The polymer thus produced can be used for films or fibers which are excellent in heat resistance, strength, etc.
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