公开(公告)号：US20220089829A1

公开(公告)日：2022-03-24

申请号：US17129286

申请日：2020-12-21

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Tomoyo OKUBO ,  Shunsuke NOZAKI ,  Tomoya SASAKI ,  Hidekazu HIROSE

IPC: C08J9/26 ,  C08L25/14

Abstract: A polyimide precursor solution, includes: a polyimide precursor; resin particles having a volume average particle diameter of 5 nm or more and 100 nm or less, and having a volume particle size distribution wherein a ratio of a volume frequency of resin particles having a particle diameter of 150 nm or more to a volume frequency of all of the resin particles in the polyimide precursor solution is 5% or less; and an aqueous solvent containing water.

公开(公告)号：US20220069413A1

公开(公告)日：2022-03-03

申请号：US17137876

申请日：2020-12-30

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Kosuke NAKADA ,  Yasunobu KASHIMA ,  Kosaku YOSHIMURA ,  Tomoya SASAKI ,  Hajime SUGAHARA ,  Tomoyo OKUBO ,  Hidekazu HIROSE

IPC: H01M50/423 ,  H01M50/429 ,  H01M50/403 ,  H01M50/46 ,  H01M50/491 ,  H01M50/494 ,  H01M50/449

Abstract: A separator for a non-aqueous secondary battery includes: a polyimide porous film; and adhesive resin particles that are attached to a surface of the polyimide porous film and have a responsiveness to at least one of pressure and heat.

公开(公告)号：US20220064379A1

公开(公告)日：2022-03-03

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

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：US20220305739A1

公开(公告)日：2022-09-29

申请号：US17385301

申请日：2021-07-26

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Takeshi IWANAGA ,  Shigeru SEITOKU ,  Kosuke NAKADA ,  Tomoyo OKUBO ,  Hidekazu HIROSE

IPC: B29C65/00 ,  H01M10/0525 ,  H01M50/417 ,  H01M50/491 ,  C08J7/043 ,  H01M50/457

Abstract: A polyimide porous film includes: a polyimide porous film body; and at least one of resin particles and a resin porous film, the at least one of the resin particles and the resin porous film adhering to one surface or both surfaces of the polyimide porous film body, and containing a fluorine-based resin or containing a fluorine-based resin and an acrylic resin.

公开(公告)号：US20220267527A1

公开(公告)日：2022-08-25

申请号：US17403011

申请日：2021-08-16

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Kosuke NAKADA ,  Shigeru SEITOKU ,  Takeshi IWANAGA ,  Tomoyo OKUBO ,  Hajime SUGAHARA ,  Hidekazu HIROSE

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

Abstract: A polyimide precursor solution contains: an aqueous solvent containing water; particles; and a polyimide precursor, wherein the polyimide precursor has a high molecular weight region A containing a high molecular weight side maximum value and a low molecular weight region B containing a low molecular weight side maximum value in an elution curve obtained by gel permeation chromatography, a weight average molecular weight in the high molecular weight region A is 50,000 or more, a weight average molecular weight in the low molecular weight region B is 10,000 or more and 30,000 or less, and a value of a/(a+b) is 0.60 or more and 0.98 or less in which a represents an area of the high molecular weight region A and b represents an area of the low molecular weight region B.

公开(公告)号：US20220306806A1

公开(公告)日：2022-09-29

申请号：US17392608

申请日：2021-08-03

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Tomoyo OKUBO ,  Takeshi IWANAGA ,  Hidekazu HIROSE ,  Kosuke NAKADA ,  Hajime SUGAHARA ,  Shigeru SEITOKU

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

Abstract: A polyimide precursor film contains a polyimide precursor, in which a total content of a solvent containing water and a solvent other than water in the polyimide precursor film is 5 mass % or more and 40 mass % or less, and a mass ratio of water to the solvent other than water in the polyimide precursor film is 0 or more and 2.5 or less.

公开(公告)号：US20220119596A1

公开(公告)日：2022-04-21

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

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.