Process for oxidizing polyarylene compounds containing thioether groups
AssigneeHoechst Aktiengesellschaft
InventorsDietrich Fleischer, Heinz Strutz, Ju/ rgen Kulpe, Andreas Schleicher
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Abstract
Process for preparing a polyarylene sulfone by oxidizing a polyarylene thioether in acetic acid with hydrogen peroxide, the reaction being carried out in the presence of catalytic amounts of concentrated sulfuric acid and/or with the addition of equilibrium per-acids. The reaction products are suitable for producing molded parts having high temperature resistance and high resistance to chemicals.
Claims15
A process for preparing a polyarylene sulfone by oxidizing a polyarylene thioether, which comprises carrying out the reaction a) in acetic acid with hydrogen peroxide in the presence of catalytic amounts of concentrated sulfuric acid and/or b) in acetic acid with addition of equilibrium per-acids.
Dependencies are inferred from the claim text.