Patent ID: 8796399

Claim:
A polyethersulfone having Tg greater than about 235° C. and a notched Izod value greater than about 1 ft-lb/in, said polyethersulfone consisting of from about 10 mol % to less than about 40 mol % structural units of formula 1A; and from greater than about 60 mol % to about 90 mol % structural units of formula 2 wherein R 2 and R 3 are independently at each occurrence a halogen atom, a nitro group, a cyano group, a C 1 -C 12 aliphatic radical, C 3 -C 12 cycloaliphatic radical, or a C 3 -C 12 aromatic radical; and n, m, q are independently at each occurrence integers from 0 to 4.