Method for producing polysulfones and polysulfones

Producing polysulfone polymer comprises (a) reacting a component A comprising at least one aromatic dihydroxy compound, preferably 4,4 '-dihydroxybiphenyl or bisphenol S with a component B1 comprising bis-(haloaryl)sulfone, preferably 4,4'-dichlorodiphenyl sulfone in the presence of a base, which reacts with 0-12 wt.% reaction mixture containing entraining agent with a boiling point of greater than 130[deg] C to form water, and (b) adding at least one controller (component D1), which is monohydric phenol, during and/or after the reaction of the component A with component B1. Producing polysulfone polymer comprises (a) reacting a component A comprising at least one aromatic dihydroxy compound, preferably 4,4'-dihydroxybiphenyl or bisphenol S with a component B1 comprising bis-(haloaryl)sulfone, preferably 4,4'-dichlorodiphenyl sulfone in the presence of a base, which reacts with 0-12 wt.% reaction mixture containing entraining agent with a boiling point of greater than 130[deg] C to form water, where greater than 0.99 to less than 1.01 equivalents component A is used based on 1 equivalent component B1, and the reaction is carried out in a solvent comprising N-alkylated pyrrolidones, and (b) adding at least one controller (component D1), which is monohydric phenol, during and/or after the reaction of the component A with component B1. An independent claim is also included for the polysulfone polymer obtained by the above mentioned method. Die vorliegende Erfindung betrifft ein verbessertes Verfahren zur Herstellung von Polysulfonen, insbesondere zur Herstellung von Polyethersulfonen (PESU) und Polyphenylensulfonen (PPSU) wobei das Lösungsmittel N-Methylpyrrolidon (NMP) oder/und N-Ethylpyrrolidon (NEP) ist. Ebenso sind die hergestellten Polysulfone, die eine erhöhte Glasübergangstemperatur aufweisen, hieraus hergestellte Formkörper und Verwendungszwecke Gegenstand der Erfindung.