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Title:
POLYIMIDE COPOLYMER, AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2014/171520
Kind Code:
A1
Abstract:
The present invention provides a polyimide copolymer which exhibits a highly satisfactory degree of solvent-solubility, storage stability, and heat resistance, and has excellent utility, and a production method for the same. The polyimide copolymer is obtained by copolymerizing a polyimide copolymer oligomer, which is obtained by copolymerizing (A) a pyromellitic acid dianhydride and (B) one or more of the diamines and the diisocyanates represented by general formulas (1) and (2) (wherein X is an amino group or an isocyanate group, R1 to R4 are each independently a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, an alkenyl group with 2 to 4 carbon atoms, or an alkoxyl group with 1 to 4 carbon atoms, and at least one of R1 to R4 is not a hydrogen atom), with (C) a second acid dianhydride different from (A).

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Inventors:
TAKIUE YOSHIYASU (JP)
Application Number:
PCT/JP2014/060974
Publication Date:
October 23, 2014
Filing Date:
April 17, 2014
Export Citation:
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Assignee:
SOMAR CORP (JP)
International Classes:
C08G73/10
Foreign References:
JPH04261431A1992-09-17
JPS59219330A1984-12-10
JP2009084339A2009-04-23
JPH07292106A1995-11-07
Attorney, Agent or Firm:
HONDA ICHIRO (JP)
Ichiro Honda (JP)
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