C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 73/10 (2006.01) B01D 71/64 (2006.01) B32B 15/08 (2006.01) C08L 79/08 (2006.01) C09D 179/08 (2006.01) H05K 1/03 (2006.01)
Patent
CA 2115334
ABSTRACT OF THE DISCLOSURE A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'- oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and chemical resistances, which is controllable in terms of porosity and pore size of the film and which has excellent electrical characteristics, and a coated material where the porous film is formed on a base material. Particularly, a film forming solution of a precursor of poly(4,4'-oxydiphenylenepyromellitimide) and a mixture of at least three solvents which are poor solvents for the precursor when each solvent is used alone, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution and a coated material where the porous film is formed on a base material. - 35 -
Echigo Yoshiaki
Iwaya Yoshiaki
Saito Minoru
Tomioka Isao
Yamada Hiroshi
Riches Mckenzie & Herbert Llp
Unitika Ltd.
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