Process for making photopolymerizable aromatic polyamic acid...

Details Process for making photopolymerizable aromatic polyamic acid... Process for making photopolymerizable aromatic polyamic acid...

C - Chemistry, Metallurgy

08

G

402/221, 260/473

C08G 73/10 (2006.01) G03F 7/038 (2006.01)

Patent

CA 1247636

TITLE PROCESS FOR MAKING PHOTOPOLYMERIZABLE AROMATIC POLYAMIC ACID DERIVATIVES ABSTRACT A process for the synthesis of the photosensitive polyamic acid derivatives which are polyimide precursors, comprising the sequential steps: (1) Partially derivatizing an aromatic dianhydride with a reactive monomer containing a photosensitive moiety; (2) Condensation polymerizing the partially derivatized aromatic dianhydride with aromatic diamine to form polyamic acid; (3) Isoimidazation of the polyamic acid: (4) Condensation of the polyisoimide to polyamic acid derivative by reaction with additional reactive monomer: and (5) Separation of the polyamic acid derivative.

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