Preparation of aromatic ketone-sulfone, copolymers

Abstract From the Canadian patent

26775-27, Abstract of the Disclosure, A process for producing aromatic ketone-sulfone copolymers which comprises polymerizing appropriate monomers by a Friedel-Crafts polymerization reaction using a Lewis acid catalyst. A controlling agent such as a Lewis base is added to the reaction medium. The reaction medium comprises for example, aluminum trichloride as the Lewis acid an organic Lewis base such, as N,N-dimethlformamide or an inorganic Lewis base such as sodium or lithium chloride as the controlling agent and a diluent such, as methylene chloride as the controlling agent and a diluent such, as methylene chloride or 1,2-dichloroethane. The amount of Lewis acid, the amount of Lewis base, …