Crosslinkable polyimides from bis (aminophenoxy) benzonitriles

Details Crosslinkable polyimides from bis (aminophenoxy) benzonitriles Crosslinkable polyimides from bis (aminophenoxy) benzonitriles

1989-05-18

1992-03-31

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528188, 528229, 528352, 528353, 4273855, C08G 6300, C08G 6926, C08G 6942

Patent

active

051010054

ABSTRACT:
The present invention provides cross-linkable polyimide polymers having at least one repeating unit of the sturcture of: ##STR1## wherein n is the number of repeating groups and A is a tetravalent aromatic organic radical wherein each pair of carbonyl groups are attached to adjacent carbons in the ring moiety A.
It has been found that polyimides having the structure of formula I may be crosslinked at surprisingly low temperatures when heated from about 75 to about 110.degree. C. to form infusible and solvent resistant shapes, thereby rendering them useful in the preparation of films, laminates and composites where inertness to solvents is a prerequisite.

REFERENCES:
patent: 3763211 (1973-10-01), Heath et al.
patent: 4742152 (1988-05-01), Scda
patent: 4877653 (1989-10-01), Vora et al.
T. M. Keller, Polymer Communications, 28, 1987, pp. 337-339.
W. B. Alston, in "Bicentennial of Materials," Eighth Annual SAMPE Technical Conference, 8, 1976, pp. 114-131.

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