METHODS FOR THE PREPARATION OF POLY(ETHERIMIDES)S

摘要

A new method for the synthesis of poly(etherimide)s comprises transimidation of bis(imide) (IV), formula (IV), in the presence of a substituted phthalic anhydride or 4-substituted tetrahydrophthalic anhydride to yield dianhydride (V), formula (V), which may then be reacted with a diamine to produce poly(etherimide)s. By-product substituted N-alkylphthalimide or 4-substituted N-alkyltetrahydrophthalic anhydride may be recycled or converted to 4-substituted N-alkylphthalimide for use in the formation bisimide (IV), obviating the need for a nitration step.