PROCESS FOR THE PRODUCTION OF POLYETHERIMIDES

摘要

A process for preparing polyetherimides at higher production rates and a liquid reaction mixture are disclosed.

主权项

1. A process for preparing a polyetherimide resin comprising charging a reactor with a liquid reaction solvent, bisphenol A dianhydride, meta-phenylene diamine and a chain stopper selected from phthalic anhydride and aniline, introducing a stream of dry inert gas below the surface of the liquid reactor contents and selectively removing water from the reactor by dispersing the inert gas within the liquid reactor contents and drawing off the inert gas and water from the headspace of the reactor, thereby preparing the polyetherimide resin.