Polyamide acid composition for preparing polyimide

Details Polyamide acid composition for preparing polyimide Polyamide acid composition for preparing polyimide

1984-01-13

1985-05-07

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 86, 524 99, 524104, 524600, C08L 7908

Patent

active

045159157

ABSTRACT:
A polyamide acid composition for preparing a polyimide which is improved in the stability in a form of solution and can extend the pot life of the composition comprising a solution of a polyamide acid in an organic solvent, the polyamide acid being a precursor of the polyimide, and an N-substituted heterocyclic compound as a chemical treating agent which can lower a rate of conversion of the polyamide acid to the polyimide. The pot life can be extremely extended to give the composition an enough flowability for a long time without reducing the excellent properties such as a heat resistance of the obtained polyimide.

REFERENCES:
patent: 3179630 (1965-04-01), Endrey et al.
patent: 3179632 (1965-04-01), Hendrix et al.
patent: 3179634 (1965-04-01), Edward et al.
patent: 3410826 (1968-11-01), Endrey et al.
patent: 3541036 (1970-11-01), Libackyi
patent: 3898199 (1975-08-01), Biensan et al.
patent: 4183835 (1980-01-01), Yamaguchi et al.
patent: 4454276 (1984-06-01), Uda et al.

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