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.
一种用于纯化
双酚A二酐组合物的方法包括将
双酚A二酐组合物与卤代溶剂接触以形成溶液,以及通过以下一种或多种方法来过滤溶液以去除离子物种:过滤溶液以去除离子物种;用
水介质洗涤溶液以去除离子物种;从溶液中结晶出
双酚A二酐以去除离子物种;以及将溶液与吸附剂接触以去除离子物种。还描述了一种纯化的
双酚A二酐组合物。
双酚A二酐组合物可用于制备聚醚
酰亚胺,由
双酚A二酐组合物制成的聚醚
酰亚胺可用于形成各种物品。