3879428 is referenced by 50 patents and cites 1 patents.

Aromatic bis(ether anhydride)s can be made by a nitro displacement of an N-substituted nitrophthalimide with an alkali (diphenoxide to produce an intermediate aromatic bis(etherphthalimide). Hydrolysis of the aromatic bis(etherphthalimide) to the corresponding tetra-acid salt followed by acidification and dehydration, results in the production of the aromatic bis(ether anhydride). These anhydrides can be used as intermediates for making polyimides. The intermediate aromatic bis(etherphthalimide) can be employed as a plasticizer in polyimide resins.

Title
Method for making aromatic bis(ether anhydride)s
Application Number
05/346,473
Publication Number
3879428
Application Date
March 30, 1973
Publication Date
April 22, 1975
Inventor
Takekoshi Tohru
Heath Darrell R
Agent
Squillaro Jerome C
Cohen Joseph T
Teoli William A
Assignee
General Electric Company
IPC
C07c 63/00
C07c 63/48
C07D 209/48
C07D 209/00
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