Process for preparing polyimides from derivatives of phthalic an

Details Process for preparing polyimides from derivatives of phthalic an Process for preparing polyimides from derivatives of phthalic an

1974-06-10

1976-04-20

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47CP, 260 775R, 260 78TF, 528 84, 528288, C08G 7510

Patent

active

039519228

ABSTRACT:
The compounds 4-azidocarbonylphthalic anhydride, 4-isocyanatophthalic anhydride, and the lower-alkyl carbamates obtained by reacting the latter isocyanate with a lower-aliphatic alcohol, are described. A process for the preparation of a polyimide by heating these compounds alone or in admixture with other polyisocyanates is also described. The 4-azidocarbonylphthalic anhydride is an intermediate for the 4-isocyanatophthalic anhydride.

REFERENCES:
patent: 3109836 (1963-11-01), Berry

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