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Title:
IMIDE-AMIC ACID COPOLYMER AND METHOD FOR PRODUCING SAME, VARNISH, AND POLYIMIDE FILM
Document Type and Number:
WIPO Patent Application WO/2021/210640
Kind Code:
A1
Abstract:
Provided is an imide-amic acid copolymer including a repeating unit that comprises an imide moiety (IM), an amic acid moiety (AM1) and an amic acid moiety (AM2) and that is represented by formula (1). (In formula (1), Ｘ1 represents an alicyclic group having a valency of 4 and having 4 to 39 carbon atoms; Ｘ2 represents an aromatic group having a valency of 4 and having 4 to 39 carbon atoms; Ｙ1 represents a group derived from diaminodiphenylsulfone or else; Ｙ2 represents a group derived from 4-aminophenyl-4-aminobenzoate or else; and each of s, t and u represents a positive integer.)

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Inventors:
ABIKO YOHEI (JP)
DAITO AOI (JP)
ISHII KENTARO (JP)
MITADERA JUN (JP)
Application Number:
PCT/JP2021/015572
Publication Date:
October 21, 2021
Filing Date:
April 15, 2021
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G73/14; C08J5/18; G02F1/1333
Domestic Patent References:
WO2020138360A12020-07-02
Foreign References:
JP6444522B22018-12-26
JP2015135464A2015-07-27
JPH07157560A1995-06-20
JP2006016592A2006-01-19
JP2002201271A2002-07-19
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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