Title:
POLYIMIDE RESIN, POLYIMIDE RESIN COMPOSITION, POLYIMIDE VARNISH, AND POLYIMIDE FILM
Document Type and Number:
WIPO Patent Application WO/2021/132109
Kind Code:
A1
Abstract:
The present invention is a polyimide resin which has a constituent unit A derived from a tetracarboxylic acid dianhydride and a constituent unit B derived from a diamine, wherein: the constituent unit A contains at least one constituent unit that is selected from the group consisting of a constituent unit (A1) derived from a compound represented by formula (a1) and a constituent unit (A2) derived from a compound represented by formula (a2); the constituent unit B contains at least one constituent unit (B1) that is selected from the group consisting of a constituent unit derived from a compound represented by formula (b11), a constituent unit derived from a compound represented by formula (b12) and a constituent unit derived from a compound represented by formula (b13), and at least one constituent unit (B2) that is selected from the group consisting of a constituent unit derived from a compound represented by general formula (b21) and a constituent unit derived from a compound represented by general formula (b22); and the molar ratio of the constituent unit (B1) to the constituent unit (B2), namely (B1)/(B2) is from 45/55 to 75/25. The present invention provides: a polyimide resin which is capable of forming a film that has excellent transparency and optical isotropy, while exhibiting excellent ductility; a polyimide resin composition; a polyimide varnish; and a polyimide film. (In the formulae, each of R1 and R2 independently represents a methyl group or a trifluoromethyl group; and each of X1 to X4 independently represents a single bond, an alkylene group having 1 to 5 carbon atoms, an alkylidene group having 2 to 5 carbon atoms, -S-, -SO-, -SO2-, -O- or –CO-.)
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Inventors:
NAKANISHI KOHEI (JP)
SUENAGA SHUYA (JP)
HIROSE SHIGEYUKI (JP)
SUENAGA SHUYA (JP)
HIROSE SHIGEYUKI (JP)
Application Number:
PCT/JP2020/047567
Publication Date:
July 01, 2021
Filing Date:
December 18, 2020
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G73/10; C08J5/18; C08L27/12; C08L33/04; C08L79/08; C08L83/04
Domestic Patent References:
| WO2020040057A1 | 2020-02-27 |
Foreign References:
| JP2009158897A | 2009-07-16 | |||
| JP2011178855A | 2011-09-15 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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