Polar aprotic solvent-soluble poly:arylene sulphide sulphonic acids

摘要

Polyarylene sulphide-sulphonic acids which are soluble in polar aprotic solvents are new. Also claimed is the prepn. of the acids, comprising completely dissolving the polyarylene sulphide in chloro sulphonic acid, opt. adding oleum or acetic anhydride, and then precipitating the prod. in an aq. medium.