Polyimide compositions

Details Polyimide compositions Polyimide compositions

C - Chemistry, Metallurgy

08

G

402/221

C08G 73/10 (2006.01)

Patent

CA 1240438

ABSTRACT A soluble polyimide derived from dehydration of a polyamic acid which is the liquid phase condensation reaction product of a solution in aprotic solvent of approximately equimolar amounts of aromatic dianhydride and aromatic diamine. At least 50 mole % of the dianhydride must have ring linkages which prevent conjugation between the rings and at least 20 mole % of the diamine must contain electron withdrawing groups.

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