Method of making aromatic bis(ether ortho phthalic acid)s

Details Method of making aromatic bis(ether ortho phthalic acid)s Method of making aromatic bis(ether ortho phthalic acid)s

1974-12-06

1976-05-18

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30789

Patent

active

039578623

ABSTRACT:
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.

REFERENCES:
patent: 3787475 (1974-01-01), Heath et al.

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