Process for forming end-capped polyamic acids polyimides

Details Process for forming end-capped polyamic acids polyimides Process for forming end-capped polyamic acids polyimides

C - Chemistry, Metallurgy

08

G

402/221, 402/238

C08G 69/28 (2006.01) C08G 73/10 (2006.01)

Patent

CA 2016266

PROCESS FOR FORMING END-CAPPED POLYAMIC ACIDS POLYIMIDES ABSTRACT This invention discloses a process where a portion of an amine terminated polyamic acid intermediate is end-capped with an aromatic monoanhydride additionally substituted with a free carboxylic acid or ester thereof. The polyamic acids of this invention are readily converted to high molecular weight polyimides which may contain a small amount of amide groups.

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