Invention Application
- Patent Title: TETRACARBOXYLIC DIANHYDRIDE, POLYIMIDE PRECURSOR RESIN, POLYIMIDE, POLYIMIDE PRECURSOR RESIN SOLUTION, POLYIMIDE SOLUTION, AND POLYIMIDE FILM
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Application No.: US17264447Application Date: 2019-08-01
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Publication No.: US20220112209A1Publication Date: 2022-04-14
- Inventor: Shinichi KOMATSU , Daisuke WATANABE
- Applicant: ENEOS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ENEOS CORPORATION
- Current Assignee: ENEOS CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2018-147029 20180803,JP2018-242513 20181226
- International Application: PCT/JP2019/030148 WO 20190801
- Main IPC: C07D493/10
- IPC: C07D493/10 ; C08G73/10 ; C08J5/18
Abstract:
A tetracarboxylic dianhydride that is a mixture of stereoisomers of a compound represented by the following general formula (1): [in the formula (1), R1, R2, and R3 each independently represent a hydrogen atom or the like and n is an integer of 0 to 12], wherein a content of an isomer (A) represented by a specific general formula is 40% by mol to 98% by mol relative to a total amount of the stereoisomers, a content of an isomer (B) represented by a specific general formula is 2% by mol to 60% by mol relative to the total amount of the stereoisomers, and a summed amount of the isomers (A) and (B) is 42% by mol or more relative to the total amount of the stereoisomers.
Information query
