Production of poly(arylene sulfide sulfone) with excess water to alkali metal sulfide

摘要

An improved process for producing poly(arylene sulfide sulfone) of increased molecular weight is provided. The process employs an Li salt of C.sub.1 -C.sub.20 carboxylic acid as a polymerization auxiliary and is carried out in an organic amide solvent by reacting a dihalogenated aromatic sulfone with an alkali metal sulfide in the presence of 10-15 moles of water per mole of the alkali metal sulfide at temperatures within the range of from 160 C. to 230 C.