METHOD FOR PURIFICATION OF A BISPHENOL A DIANHYDRIDE COMPOSITION, BISPHENOL A DIANHYDRIDE COMPOSITION, POLY(ETHERIMIDE) DERIVED FROM THE BISPHENOL A DIANHYDRIDE COMPOSITION, AND ARTICLES PREPARED THEREFROM

摘要

A method for the purification of a bisphenol A dianhydride composition includes contacting the bisphenol A dianhydride composition with a halogenated solvent to form a solution, and one or more of filtering the solution to remove ionic species; washing the solution with aqueous media to remove ionic species; crystallizing bisphenol A dianhydride from the solution to remove ionic species; and contacting the solution with an adsorbent to remove ionic species. A purified bisphenol A dianhydride composition is also described. The bisphenol A dianhydride composition can be used in the preparation of a poly(etherimide), and poly (etherimides) made from the bisphenol A dianhydride composition can be useful for forming a variety of articles.