Abstract Phthalonitrile-terminated aromatic polyimides and polyimidephthalocyanines are provided. The phthalonitrile-terminated polyimides are prepared by reacting an anhydride end-capped, aromatic polyimide with at least two moles of a dicyano aromatic monoamine to give a polyimide of the structural formula: WHEREIN Ar is a divalent aromatic organic radical, Ar'' is a tetravalent aromatic organic radical, the four carbonyl groups being attached directly to separate carbon atoms and each pair of carbonyl groups being attached to adjacent carbon atoms in the Ar'' radical, R'' is an aromatic organic radical, the two cyano groups being ortho in the aromatic radical and N IS A POSITIVE INTEGER OF AT LEAST 1. The phthalonitrile-terminated polyimides may be chain-extended to higher molecular weight, infusible, insoluble polymers by heating at about 180*C. to about 300*C., or by reaction with polyvalent metals, such as copper, iron, magnesium, etc. or salts of such metals to yield the polyimidemetallo phthalocyanines. The materials described herein are useful as high temperature resistant coatings, molded articles and laminated structures.
A PHTHALONITRILE-TERMINATED AROMATIC POLYIMIDE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
A PHTHALONITRILE-TERMINATED AROMATIC POLYIMIDE HAVING THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
15 words
The phthalonitrile-terminated polyimide of claim 1 wherein Ar is selected from the group consisting of
Claim 4
Dependent Claim
9 words
The phthalonitrile-terminated polyimide of claim 2 wherein R'' is
Claim 5
Dependent Claim
35 words
A process for preparing a phthalonitrile-terminated aromatic polyimide comprising reacting at a temperature of less than 140*C in at least one aromatic phenol solvent and in the presence of an organic azeotroping agent m+1 moles
Claim 6
Dependent Claim
35 words
A process for preparing a phthalonitrile-terminated aromatic polyimide comprising reacting at a temperature of less than 140*C in at least one aromatic phenol solvent and in the presence of an organic azeotroping agent m+1 moles
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein Ar is selected from the group consisting of
Claim 8
Dependent Claim
8 words
The process of claim 5 wherein R'' is
Claim 9
Dependent Claim
24 words
The process of chain-extending the polyimide of claim 1 which comprises heating the polyimide in the temperature range of about 180*C to about 300*C.