C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/112, 402/220
C08L 77/10 (2006.01) C08G 73/10 (2006.01) C08L 61/00 (2006.01)
Patent
CA 1253882
NOVEL DINITROBENZOPHENONE SOLUTION AND PROCESS FOR PREPARING AN ETHER SOLUTION OF DIAMINOBENZOPHENONES THEREFROM Abstract of the Disclosure A novel ether solution of dinitrobenzophenone and a process for preparing an ether solution of diaminobenzophenone therefrom which comprises subjecting a dinitrobenzophenone dissolved in said ether solvent to hydrogenation in contact with a continuous nickel catalyst to obtain said solution of diaminobenzophenone dissolved in said ether solvent. In a specific embodi- ment said nickel catalyst is mounted on an inert support. In a still further embodiment, said diaminobenzophenone dissolved in said ether solvent, after removal of water therefrom, is reacted with an aromatic dianhydride to obtain a polyamic acid solution. The polyamic acid solution can be heated at a temperature above 100°C. to drive off water of cyclization and thereby obtain the corresponding polyimide resin.
423479
Onopchenko Anatoli
Sabourin Edward T.
Selwitz Charles M.
Gulf Research & Development Company
Mccarthy Tetrault Llp
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