CHLOROSULFONATED POLYARYLETHER-SULFONE RESIN AND METHOD OF PREPARATION BY CHLOROSULFONATION OF DIFFICULTLY SULFONATABLE POLY(ETHER SULFONE)AND DERIVATIVES AND ION EXCHANGE RESINS FORMED FROM IT

摘要

A chlorosulphonated polyaryl ether sulphone resin, in which the polyaryl ether sulphone is linear or branched and comprises a plurality of repeating units of the formula… -Ar1-SO2-Ar2-L-… wherein L is a linking radical and Ar1 and Ar2 are the same or different phenylene radicals optionally substituted with non-deactivating groups; and in which some at least of the same or different phenylene radicals are substituted with hydroxysulphonyl groups and chlorosulphonyl groups, the ratio of chlorosulphonyl groups to hydroxysulphonyl groups is from 0.01:1 to 20:1, and the combined contents of hydroxysulphonyl and chlorosulphonyl groups are from 0.05 to 4 meq/g of dry resin. …??The resin may be prepared by reaction of a polyaryl ether sulphone with chlorosulphonic acid. The resin may be hydrolysed to form a sulphonated polysulphone, or reacted with an amine, haloalkane or alcohol, to give an ion-exchange resin material.