| 主权项 |
1. A method for the production of polysulfone polymers, in which a component A, comprising at least one aromatic dihydroxy compound, selected from the group consisting of 4,4′-dihydroxybiphenyl and/or bisphenol S, is converted with a component B, comprising at least one bis-(haloaryl)sulfone in the presence of a base which reacts with the reaction mixture under formation of water, wherein
0.95 to 0.99 or 1.01 to 1.05 equivalents of component A are used relative to 1.0 equivalent of component B, the conversion is implemented in a solvent, comprising N-alkylated pyrrolidones, and at least one entrainer with a boiling point of greater than 130° C. is added to this reaction mixture. |
