POLYIMIDE PRECURSOR SOLUTION, METHOD FOR PRODUCING POLYIMIDE PRECURSOR SOLUTION, METHOD FOR PRODUCING POLYIMIDE FILM, AND METHOD FOR PRODUCING POROUS POLYIMIDE FILM

• Main Authors: YOSHIMURA, Kosaku, ISHIZUKA, Takahiro, KASHIMA, Yasunobu, SUGAHARA, Hajime
• Format: Patent
• Language: English; French; German
• Published: 21.09.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A polyimide precursor solution contains a polyimide precursor having a weight average molecular weight of 40,000 or more, and an aqueous solvent containing a tertiary amine compound and water, in which a viscosity of the polyimide precursor solution after a storage at 25°C for 14 days is 50% or more...