Patent ID: 6849706

Claim:
A copolyetherimide having a glass transition temperature of at least about 218° C., said copolyetherimide comprising structural units of the formulas (I) and (II): and optionally structural units of the formula (III): wherein R 1 comprises an unsubstituted C 6-22 divalent aromatic hydrocarbon or a substituted C 6-22 divalent aromatic hydrocarbon comprising halogen or alkyl substituents or mixtures of said substituents; or a divalent radical of the general formula (IV): group wherein the unassigned positional isomer about the aromatic ring is either meta or para to Q, and Q is a covalent bond or a member selected from the consisting of formulas (V): and an alkylene or alkylidene group of the formula C y H 2y , wherein y is an integer from 1 to 5 inclusive, and R 2 is a divalent aromatic radical; the weight ratio of units of formula (I) to those of formula (II) being in the range of about 99.9:0.1 and about 25:75.