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.

公开(公告)号：US20230094406A1

公开(公告)日：2023-03-30

申请号：US17799607

申请日：2021-02-05

Applicant: ENEOS CORPORATION

Inventor： Shinichi KOMATSU

IPC: C08G69/44 ,  C08G63/60 ,  C08G63/672 ,  C08G63/81 ,  C08J5/18

Abstract: A liquid crystal polyester wherein a linear liquid crystal polymer chain including specific monomers (A) to (C), in which at least one of the monomer (B) and the monomer (C) contains a compound for forming a bent structural unit, and a content of the compound for forming a bent structural unit is 20 to 40% by mol relative to a total molar amount of the monomers (A) to (C), is bonded via a specific monomer (D), and a content proportion of the monomer (D) is 0.01 to 10 mol relative to 100 mol of the total molar amount of the monomers (A) to (C).