公开(公告)号：US11584837B2

公开(公告)日：2023-02-21

申请号：US16540060

申请日：2019-08-14

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Yasunobu Kashima ,  Kosaku Yoshimura ,  Hajime Sugahara ,  Hidekazu Hirose

IPC: H01M10/00 ,  C08J9/00 ,  H01M10/0525 ,  H01M50/411

Abstract: There is provided a porous polyimide film in which the pore distribution width A represented by the following formula is 1.15 or less, the average pore diameter is within a range of 0.50 μm to 3.0 μm, and the air permeation speed is 30 seconds or less: A=(D84/D16)1/2 wherein D16 is the pore diameter at 16% cumulation from the small diameter side of pores, and D84 is the pore diameter at 84% cumulation from the small diameter side of pores.

公开(公告)号：US12018128B2

公开(公告)日：2024-06-25

申请号：US17380016

申请日：2021-07-20

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Tomoya Sasaki ,  Hidekazu Hirose ,  Kosaku Yoshimura ,  Yasunobu Kashima ,  Hajime Sugahara ,  Kosuke Nakada ,  Tomoyo Okubo

IPC: C08G73/10 ,  C08J5/18 ,  C08J9/26

CPC classification number: C08G73/1067 ,  C08G73/1021 ,  C08G73/1032 ,  C08G73/1042 ,  C08J5/18 ,  C08J9/26 ,  C08J2201/046 ,  C08J2379/08

Abstract: A particle-dispersed polyimide precursor solution contains a polyimide precursor having a unit represented by the following formula (I), particles, and a solvent, in which the particle-dispersed polyimide precursor solution satisfies both the following conditions (1) and (2),






(in the formula (I), A represents a tetravalent organic group, and B represents a divalent organic group represented by any of the following formulas (B1) to (B4)),










(in the formulas (B1) to (B4), Ar1, Ar10, and Ar11 each independently represent a trivalent aromatic group which may have a substituent, Ar2, Ar4, Ar5, Ar7 and Ar8 each independently represent a divalent aromatic group which may have a substituent, Ar3 and Ar6 each independently represent a tetravalent aromatic group which may have a substituent or a group represented by the following formula (II), Ar9 represents a divalent aromatic group which may have a substituent or a group represented by the following formula (III), X1 to X7 each independently represent NRa, O, or S, Ra represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group, and * represents a bonding site with an adjacent linking group), and










(in the formulas (II) and (III), Ar12 and Ar13 each independently represent a trivalent aromatic group which may have a substituent, Ar14 and Ar15 each independently represent a divalent aromatic group which may have a substituent, Y and Z each independently represent O, S, S(═O)2, or CRbRc, Rb and Rc each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group, and * represents a bonding site with an adjacent linking group),
Condition (1): a total content of the groups represented by the formulas (B1) to (B4) is 1% by mass or more and 40% by mass or less with respect to a total amount of the polyimide precursor, and
Condition (2): a content of the particles is 5% by mass or more and 90% by mass or less with respect to a total content of the polyimide precursor and the particles.

公开(公告)号：US11043718B2

公开(公告)日：2021-06-22

申请号：US16561511

申请日：2019-09-05

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Kosaku Yoshimura ,  Yasunobu Kashima ,  Hajime Sugahara ,  Hidekazu Hirose

IPC: H01M2/16 ,  H01M10/0525 ,  H01M10/0562 ,  C08J9/26 ,  H01M50/411

Abstract: A porous polyimide film has an acid value within a range of 7 mgKOH/g to 20 mgKOH/g determined by acid-base titration, contains a metal group including alkali metals excluding Li, an alkaline earth metals, and silicon at a total content of 100 ppm or less relative to the porous polyimide film, and has a moisture absorption ratio of 0.5% or less.

公开(公告)号：US12247103B2

公开(公告)日：2025-03-11

申请号：US17577358

申请日：2022-01-17

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Kosaku Yoshimura ,  Yasunobu Kashima ,  Takahiro Ishizuka

IPC: C08G73/10 ,  B29C67/20 ,  H01M50/403 ,  H01M50/414 ,  H01M50/491 ,  B29K79/00 ,  B29K105/00

Abstract: A polyimide precursor solution includes a polyimide precursor having a glass transition temperature Tg of equal to or higher than 300° C. after imidization, an aqueous solvent containing water, an organic amine compound, and resin particles having a volume average particle size of equal to or less than 100 nm.

公开(公告)号：US11211670B2

公开(公告)日：2021-12-28

申请号：US16520844

申请日：2019-07-24

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Hajime Sugahara ,  Hidekazu Hirose ,  Tomoya Sasaki ,  Kosaku Yoshimura ,  Yasunobu Kashima

IPC: H01M2/16 ,  H01M50/411 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/133 ,  H01M10/0562 ,  H01M4/1391 ,  H01M4/02

Abstract: An all-solid-state battery includes a positive electrode active material layer containing a positive electrode active material; a negative electrode active material layer containing a negative electrode active material; and a solid electrolyte layer containing a solid electrolyte and a porous polyimide film which holds the solid electrolyte. The porous polyimide film has a void ratio of 60% or more and 80% or less and a pore diameter of 0.1 μm or more and 10 μm or less.

公开(公告)号：US20240010802A1

公开(公告)日：2024-01-11

申请号：US18156405

申请日：2023-01-19

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Hajime SUGAHARA ,  Hidekazu Hirose ,  Kosaku Yoshimura ,  Shigeru Seitoku ,  Kosuke Nakada ,  Satoshi Yoshida

IPC: C08J5/18 ,  C08L79/08 ,  C08J9/00 ,  C08J9/28

CPC classification number: C08J5/18 ,  C08L79/08 ,  C08J9/0061 ,  C08J9/286 ,  C08L2203/16 ,  C08J2379/08 ,  C08J2425/06 ,  C08J2205/042 ,  C08J2205/044

Abstract: A porous polyimide film has a ratio of a cross-sectional average micro pore diameter (μm) to a first surface micro pore diameter (μm) on one surface (the cross-sectional average micro pore diameter/the first surface micro pore diameter) of equal to or more than 5 and equal to or less than 10.

公开(公告)号：US11680156B2

公开(公告)日：2023-06-20

申请号：US17149724

申请日：2021-01-15

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Yasunobu Kashima ,  Kosaku Yoshimura ,  Tomoya Sasaki ,  Kosuke Nakada ,  Hidekazu Hirose

IPC: C08L71/02 ,  C08J5/18 ,  C08L79/08 ,  C08L1/10 ,  C08J9/26

CPC classification number: C08L1/10 ,  C08J5/18 ,  C08J9/26 ,  C08L71/02 ,  C08J2301/10 ,  C08J2371/02 ,  C08J2425/06 ,  C08J2433/12 ,  C08J2479/08 ,  C08L2205/03

Abstract: A polyimide precursor-containing aqueous composition contains 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.

公开(公告)号：US11680140B2

公开(公告)日：2023-06-20

申请号：US17146436

申请日：2021-01-11

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Hajime Sugahara ,  Hidekazu Hirose ,  Kosaku Yoshimura ,  Tomoya Sasaki ,  Yasunobu Kashima ,  Kosuke Nakada ,  Tomoyo Okubo

IPC: C08G73/10 ,  C08J9/26

CPC classification number: C08G73/1032 ,  C08J9/26 ,  C08J2379/08

Abstract: A particle-dispersed polyimide precursor solution contains: a polyimide precursor consisting of a polymer of a tetracarboxylic dianhydride and a diamine containing a fluorene-based diamine having a fluorene skeleton; particles; and an aqueous solvent containing water.

公开(公告)号：US11495863B2

公开(公告)日：2022-11-08

申请号：US16853677

申请日：2020-04-20

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Kosuke Nakada ,  Hidekazu Hirose ,  Yasunobu Kashima ,  Kosaku Yoshimura ,  Tomoya Sasaki

IPC: H01M50/411 ,  H01M10/0525

Abstract: A porous polyimide film has plural pores, in which an average flattening of the plural pores is within a range of 0.1 to 0.7, a coefficient of variation of a distance between adjacent pores is within a range of 0.10 to 0.40, and a front surface and aback surface communicate with each other through the plural pores.