Title:
METHOD FOR PRODUCING POLYIMIDE FILM
Document Type and Number:
WIPO Patent Application WO/2024/058194
Kind Code:
A1
Abstract:
This method for producing a polyimide film comprises: a step 1 in which, at 50°C to 120°C, a solvent is removed from a varnish that contains the solvent and a polyimide precursor having a polyamic acid moiety, and the resulting varnish is dried; and a step 2 in which the resulting product is imidized by being held at 300°C to 400°C for 10 minutes to 120 minutes, and subsequently held at 420°C to 500°C. With respect to this method for producing a polyimide film, the polyamic acid moiety has a structural unit that is derived from a tetracarboxylic acid dianhydride and a structural unit that is derived from a diamine; and a diamine which enables the achievement of the structural unit derived from a diamine includes a diamine that has an ionization potential of 7.10 eV or more.
More Like This:
| JPH06202119 | ORIENTING AGENT FOR LIQUID CRYSTAL |
| JP2733168 | RESIN-SEALED SEMICONDUCTOR DEVICE |
| JP6733985 | Method for producing organic compounds |
Inventors:
HOSHINO SHUN (JP)
MURAYA TAKAHIRO (JP)
SUZUKI KOUJI (JP)
ISHII KENTARO (JP)
HATAKEYAMA TAKURO (JP)
MURAYA TAKAHIRO (JP)
SUZUKI KOUJI (JP)
ISHII KENTARO (JP)
HATAKEYAMA TAKURO (JP)
Application Number:
PCT/JP2023/033284
Publication Date:
March 21, 2024
Filing Date:
September 13, 2023
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G73/10; C08J5/18
Domestic Patent References:
| WO2019188265A1 | 2019-10-03 | |||
| WO2022054850A1 | 2022-03-17 | |||
| WO2016024457A1 | 2016-02-18 |
Foreign References:
| JP2021187934A | 2021-12-13 | |||
| JP2020172652A | 2020-10-22 | |||
| JP2022061487A | 2022-04-18 | |||
| JPH10301281A | 1998-11-13 | |||
| JP2019502786A | 2019-01-31 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
Download PDF: