Dibenzofuran-2,3,6,7-tetracarboxylic acid dianhydride

Details Dibenzofuran-2,3,6,7-tetracarboxylic acid dianhydride Dibenzofuran-2,3,6,7-tetracarboxylic acid dianhydride

1975-05-30

1977-09-06

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 47CP, 260 78TF, 260326C, 260580, 26034611, C07D49314

Patent

active

040467791

ABSTRACT:
The present disclosure relates to a new composition of matter dibenzofuran-2,3,6,7,-tetracarboxylic acid dianhydride and polymers derived therefrom including polyamic acid or polyimide polymers formed from the reaction of the above dianhydride and a diamine. The claimed dianhydride finds use as an excellent cross-linking moiety. Condensation polymers derived from the dianhydride and diamines are useful in the production of films and fibers with good thermal stability.

REFERENCES:
patent: 2433645 (1947-12-01), Bitler et al.
patent: 3045028 (1962-07-01), Enninga et al.
patent: 3190853 (1965-06-01), Watson
patent: 3891633 (1975-06-01), Berlin et al.

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