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US 4,183,839 AGranted
Polyimide resin-forming composition
AssigneeJohn V. Long
InventorJohn Gagliani
Life of this patent
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Abstract
Polyimides of the formula ##STR1## Methods of making and polymerizing precursors for such polymers. Coating and adhesive compositions including constituents which can be converted into polyimides with the foregoing structure. Methods of making and using the compositions. Adhesion promoters for such compositions which are reaction products of aromatic dianhydrides and cyclic oxoimines, and methods of producing and using the adhesion promoters.
Claims10
A process for preparing a polyimide of the formula:
- ##STR11## wherein A.sub.1 is a divalent aromatic radical selected from the group consisting of ##STR12## A.sub.2 is a tetravalent, aromatic radical of the formula ##STR13## n is a positive integer;
- which comprises heating a homogeneous solution consisting essentially of an inert solvent and a stoichiometric adduct of the formula:
- ##STR14## wherein x is 4-6 and A.sub.1 and A.sub.2 each have the above-indicated values to form said polyimide.
Dependencies are inferred from the claim text.