Patent ID: 9659711
Date: 2017-05-23
CPC Classifications: B29C,B29K,B29L,C08G,C08J,H01G,Y10T

Claim:
1. A uniaxially-stretched, high yield extruded polyetherimide film comprising: an extruded polyetherimide comprising units derived from polymerization of an aromatic dianhydride with a diamine selected from a meta-phenylene diamine, a para-phenylene diamine, and a combination thereof, wherein the polyetherimide is endcapped with a substituted or unsubstituted aromatic primary monoamine selected from substituted and unsubstituted anilines, substituted and unsubstituted naphthyl primary amines, and substituted, unsubstituted heteroaryl primary amines, and a combination thereof, wherein substituents are optionally halogenated C wherein the high yield extruded polyetherimide film comprises at least 90 weight percent of the polyetherimide before extrusion.