Invention Grant
- Patent Title: Liquid tetracarboxylic dianhydrides and process for the preparation thereof
- Patent Title (中): 液体四羧酸二酐及其制备方法
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Application No.: US13202067Application Date: 2009-12-08
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Publication No.: US08524921B2Publication Date: 2013-09-03
- Inventor: Tooru Kikuchi , Hayato Kotani , Katsuyuki Masuda , Toshihiko Takasaki
- Applicant: Tooru Kikuchi , Hayato Kotani , Katsuyuki Masuda , Toshihiko Takasaki
- Applicant Address: JP Tokyo
- Assignee: Hitachi Chemical Co., Ltd.
- Current Assignee: Hitachi Chemical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JPP2009-035404 20090218
- International Application: PCT/JP2009/070556 WO 20091208
- International Announcement: WO2010/095329 WO 20100826
- Main IPC: C07D493/00
- IPC: C07D493/00 ; C07D307/77 ; C07F7/08
Abstract:
The invention relates to a tetracarboxylic dianhydride represented by the following formula (1). [In formula (1) R1, R2, R3 and R4 each independently represent an alkyl group having from 1 to 5 carbon atoms, m represents a number from 1 to 30, all of the silicon atoms bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings, and all of the dicarboxylic anhydride groups bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings.]
Public/Granted literature
- US20110301362A1 NOVEL LIQUID TETRACARBOXYLIC DIANHYDRIDES AND PROCESS FOR THE PREPARATION THEREOF Public/Granted day:2011-12-08
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