Method of salvaging aromatic bisimide values

Details Method of salvaging aromatic bisimide values Method of salvaging aromatic bisimide values

1980-02-26

1982-09-14

Berch, Mark L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260326S, 260326C, C07D40312, C07B 2900, C07D40306, C07D48704

Patent

active

043494790

ABSTRACT:
A method of recovering aromatic bis(N-alkylimide)s from aqueous aromatic polyimide-alkyl amine aminolysis mixtures is provided by heating the aromatic polyimide in the presence of water and alkyl amine. The resulting aromatic bis(N-alkylimide)s can be converted to aromatic dianhydride by aromatic bisimide-organic amine exchange reactions.

REFERENCES:
patent: 3529017 (1970-09-01), Izard
patent: 3847870 (1974-11-01), Takekoshi
patent: 3850885 (1974-11-01), Takekoshi
patent: 4128574 (1978-12-01), Markezich

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