Fatty aromatic copoly(ether sulfones)

Film-forming fatty aromatic copoly(ether sulfones), processable by injection molding, are obtained from 2,2-di-(4-oxyphenyl)-propane and from phenolphthalein and a mixture of 4,4'-(dichlorodiphenyl sulfone) and α,α'-p-(xylylene dichloride). The dependence of copoly(ether sulfone) properties on the dihaloid derivative residue content in macromolecules is established