Aluminum ion-containing polyimide adhesives
OwnerRobert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Anne K. St. Clair +2inventors
InventorsRobert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Anne K. St. Clair, Larry T. Taylor, Terry L. St. Clair
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Abstract
A method for preparing an aluminum ion-filled polyimide adhesive wherein a meta-oriented aromatic diamine is reacted with an aromatic dianhydride and an aluminum compound in the presence of a water or lower alkanol miscible ether solvent to produce an intermediate polyamic acid; and thereafter converting the polyamic acid to the thermally stable, metal ion-filled polyimide by heating in the temperature range of 300.degree. C. to produce a flexible, high temperature adhesive.
Claims6
A method for preparing an aluminun ion-containing polyimide adhesive solution which comprises:
- reacting an aromatic dianhydride with an equimolar quantity of a meta-oriented aromatic diamine followed by the addition of 2-3 percent by weight of an aluminum ion-containing metal complex;
- the dianhydride and diamine reactants being previously dissolved in a solvent or mixture of solvents, at least one of which is selected from the group consisting of,
- 1,2-dimethoxyethane,
- bis(2-methoxyethyl)-ether,
- 1,2-bis(2-methoxyethoxy)ethane, and
- bis-[2-(2-methoxyethoxy)-ethyl]ether.
Dependencies are inferred from the claim text.