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US 3,956,320 AGranted
Aromatic bis(ether phthalis anhydride) compounds
AssigneeGeneral Electric Company
InventorsDarrell R. Heath, Joseph G. Wirth
Life of this patent
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Abstract
Aromatic bis(ether anhydride)s are prepared from the hydrolysis of the reaction product of a nitro-substituted phenyl dinitrile with a metal salt of a dihydroxy aryl compound in the presence of a dipolar aprotic solvent.
Claims9
The compound ##SPC31##
The compound ##SPC32##
The compound ##SPC33##
The compound ##SPC34##
The compound ##SPC35##
The compound ##SPC36##
An aromatic bis(ether anhydride) of the formula ##SPC37##
- where R.sup.1 is a member selected from the class consisting of 4,4'-diphenyl and 4,4'-diphenylsulfide.
Dependencies are inferred from the claim text.