POLYSULFONE IONOMERS

摘要

TITLE Polysulfone Ionomers INVENTORS Michael D. Guiver Oleh Kutowy John W. ApSimon Aromatic ionomeric copolymers having arylether and arylsulfone linkages have been prepared by condensation of both: (a) The alkali metal bisphenate salts of 9, 9-bis ( 4-hydroxyphenyl)-fluoren-4-carboxylic acid, optionally with another bisphenol in a proportion of 0-99 mol percent based on the combined bisphenates in the mixture; and (b) dihalodiphenylsulfones where the halogen is selected from chlorine or fluorine. The copolymers are useful as ion exchange materials and permselective membranes among other things. A process of preparing and purifying the carboxylic acid containing bisphenol monomer is described.