| abstract |
(57) [Summary] [Structure] Bisphenols with a specific structure and 4, In the method for producing polyether sulfone from 4'-dichlorodiphenyl sulfone, 1,3-dimethyl-2-imidazolidinone as shown in formula (3) is used as a polymerization solvent. Method. [Effect] The method for producing a polyether sulfone of the present invention is much easier to handle than conventional polymerization solvents, A streamlining of the manufacturing process is achieved, and furthermore, there are no side reactions in the polymerization, and the quality of the obtained polyether sulfone is improved. |