Methods for the preparation of dianhydrides
This invention relates to a method for the manufacture of poly(etherimide)s. More particularly, it relates to a method for the preparation of dianhydrides that can facilitate the manufacture of poly(etherimide)s without an intermediate nitration step. A method for the synthesis of a dianhydride comp...
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | This invention relates to a method for the manufacture of poly(etherimide)s. More particularly, it relates to a method for the preparation of dianhydrides that can facilitate the manufacture of poly(etherimide)s without an intermediate nitration step.
A method for the synthesis of a dianhydride comprises transimidation of bis (imide) (IV) in the presence of a substituted phthalic anhydride or 4-substituted tetrahydrophthalic anhydride to yield dianhydride (V) |
|---|