Dielectric films from water soluble polyimides

Details Dielectric films from water soluble polyimides Dielectric films from water soluble polyimides

1982-04-09

1983-11-29

Lee, Lester L.

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

Synthetic resins

From carboxylic acid or derivative thereof

4284735, C08G 7310

Patent

active

044181906

ABSTRACT:
A dielectric film with improved dielectric strength, mechanical strength, high temperature utility, and moisture resistance is described comprising the reaction product of 1, 2, 3, 4 butane tetracarboxylic acid, a multifunctional amine of the formula: ##STR1## and at least one diamine, the multifunctional amine constituting at least 5% of the total amine equivalents of the reactants. The polyimide dielectric film can be cast out of aqueous solution on a mold release surface.

REFERENCES:
patent: 3673145 (1972-06-01), Minami et al.
patent: 3840495 (1974-10-01), Balme et al.
patent: 3925313 (1975-12-01), Kojima et al.

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