| abstract |
The present invention provides (A) a dihalogeno compound represented by formula (I), (B) a dihydric phenol represented by formula (II), and (C) an alkali metal carbonate, represented by formulas (1) to (3). The present invention relates to a method for producing a thermoplastic aromatic polysulfone resin that undergoes a polymerization reaction in an organic solvent using a charged molar ratio that satisfies the above. (1) 0.900 <(A) / (B) <0.990, (2) {(A) / (B)} − 0.02 <(C) / (B) <{(A) / (B)} + 0.01, (3) (C) / (B) <1.00 [Chemical 1] [In the formulas (I) and (II), R 1 to R 4 are an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X and X ′ are halogen atoms, and Y is —SO 2 2- , —C (CH 3 ) 2 —, —CH 2 —, —O—, and —CO— are one or more groups or single bonds, n1, n2, n3, and n4 are 0 to Represents an integer of 4. ] |