	US 11,680,156 B2
	Polyimide precursor-containing aqueous composition, method for producing polyimide film, and method for producing porous polyimide film
Yasunobu Kashima, Kanagawa (JP); Kosaku Yoshimura, Kanagawa (JP); Tomoya Sasaki, Kanagawa (JP); Kosuke Nakada, Kanagawa (JP); and Hidekazu Hirose, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Jan. 15, 2021, as Appl. No. 17/149,724.
Claims priority of application No. JP2020-013959 (JP), filed on Jan. 30, 2020; and application No. JP2020-142665 (JP), filed on Aug. 26, 2020.
Prior Publication US 2021/0238392 A1, Aug. 5, 2021
Int. Cl. C08L 71/02 (2006.01); C08J 5/18 (2006.01); C08L 79/08 (2006.01); C08L 1/10 (2006.01); C08J 9/26 (2006.01)

CPC C08L 1/10 (2013.01) [C08J 5/18 (2013.01); C08J 9/26 (2013.01); C08L 71/02 (2013.01); C08J 2301/10 (2013.01); C08J 2371/02 (2013.01); C08J 2425/06 (2013.01); C08J 2433/12 (2013.01); C08J 2479/08 (2013.01); C08L 2205/03 (2013.01)]

14 Claims

1. A polyimide precursor-containing aqueous composition, comprising:

at least one polymer material selected from the group consisting of a water-insoluble fibrous organic substance and a polyalkylene oxide having a viscosity-average molecular weight of 5 million or more;

a polyimide precursor;

particles; and

water,

wherein a content of the at least one polymer material is 0.05% by mass or more and 15% by mass or less with respect to the particles.