Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
NEW (1S,2S,4R,5R)-CYCLOHEXANE TETRACARBOXYLIC ACID DIANHYDRIDE AND ITS USE
Document Type and Number:
Japanese Patent JP2009191253
Kind Code:
A
Abstract:

To provide 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride having high polymerization capability as a raw material of a polyimide.

The compound 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride is subjected to selective isomerization and to anhydride formation to obtain new (1S,2S,4R,5R)-cyclohexane tetracarboxylic acid dianhydride. The anhydride makes a high-molecular weight substance of a polyimide precursor easily obtainable by being reacted with various diamines. Further, the polyimide obtained by imidization fulfills strikingly high transparency, high heat resistance, sufficient film toughness and very low permittivity.


Inventors:
Yamaguchi, Shinya
Ishikawa, Atsushi
Takezawa, Eiichiro
Hasegawa, Masatoshi
Hatano, Tadashi
Application Number:
JP2008000328334
Publication Date:
August 27, 2009
Filing Date:
December 24, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
IWATANI INDUSTRIAL GASES CORP
International Classes:
C08G73/10; C07B53/00; C07C51/353; C07C61/08; C07C233/62; C07D493/04; H01L21/312; H05K1/03; C07B61/00
Domestic Patent References:
JPH08325196A
JP2004043426A
JPS5824540A
JP2006070096A
JP2006083209A
JP2002322274A
JP2001228481A
Attorney, Agent or Firm:
特許業務法人原謙三国際特許事務所