Polyimide molecular weight enhancement by solvent extraction

Details Polyimide molecular weight enhancement by solvent extraction Polyimide molecular weight enhancement by solvent extraction

C - Chemistry, Metallurgy

08

G

402/216

C08G 69/26 (2006.01)

Patent

CA 1302630

TITLE POLYIMIDE MOLECULAR WEIGHT ENHANCEMENT BY SOLVENT EXTRACTION ABSTRACT OF THE DISCLOSURE Extraction of polyamic acid-polyimide gel in bipolymerized polyimide manufacturing process with a solvent containing an extraction-enhancing agent, which is a pyridine, picoline, or guinoline, leads to a polyimide film having increased molecular weight. Polyimides are valuable materials used in fabricating articles which must withstand high temperatures, especially in aerospace applications, and in the manufacture of electronic circuit boards.

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