公开(公告)号：US20220372223A1

公开(公告)日：2022-11-24

申请号：US17640484

申请日：2020-09-09

Applicant: ENEOS Corporation

Inventor： Masatoshi HASEGAWA ,  Junichi ISHII ,  Daisuke WATANABE

IPC: C08G73/10 ,  C08J5/18 ,  C09D179/08

Abstract: Provided is a polyimide having a repeating unit represented by the following Formula (1): wherein R1 represents a tetravalent group; R2 represents a divalent group; provided that at least one of R1's is represented by the following Formula (2); and among R2's, at least one group is represented by the following Formula (3), and at least one other group is represented by the following Formula (4):

公开(公告)号：US20210122724A1

公开(公告)日：2021-04-29

申请号：US17257667

申请日：2019-07-04

Applicant: ENEOS Corporation

Inventor： Daisuke WATANABE ,  Takahiro HASEGAWA ,  Asako KYOBU

IPC: C07D307/93 ,  C07C69/753 ,  C08G73/10

Abstract: A tetracarboxylic dianhydride which is a compound represented by the following general formula (1): [in the formula (1), A represents one selected from the group consisting of optionally substituted divalent aromatic groups in each of which the number of carbon atoms forming an aromatic ring is 6 to 30, and Ras each independently represent a hydrogen atom or the like], wherein 60% by mass or more of a stereoisomer contained in the compound is an exo/exo type stereoisomer represented by a specific general formula.

公开(公告)号：US20220112209A1

公开(公告)日：2022-04-14

申请号：US17264447

申请日：2019-08-01

Applicant: ENEOS CORPORATION

Inventor： Shinichi KOMATSU ,  Daisuke WATANABE

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.