公开(公告)号：US10954340B2

公开(公告)日：2021-03-23

申请号：US15749921

申请日：2016-08-08

Applicant: TOKYO OHKA KOGYO CO., LTD. ,  ENEOS Corporation

Inventor： Kunihiro Noda ,  Hiroki Chisaka ,  Dai Shiota ,  Shinichi Komatsu

IPC: C08G73/12 ,  C08L79/08 ,  C08G73/10 ,  C08K5/3445

Abstract: A polyimide precursor composition that exhibits excellent tensile strength and breaking elongation, and that provides a film containing an alicyclic polyimide resin; a method for producing a polyimide film using the polyimide precursor composition; and a permanent film that contains an alicyclic polyimide resin and that exhibits excellent tensile strength and breaking elongation. The polyimide precursor composition is a mixture of a resin precursor component which is a polyamic acid including an alicyclic backbone having a predetermined structure, a monomer component that includes an aromatic diamine compound having a predetermined structure or an alicyclic tetracarboxylic acid di-anhydride having a predetermined structure; an imidazole compound having a predetermined structure; and a solvent.

公开(公告)号：US11136435B2

公开(公告)日：2021-10-05

申请号：US16070401

申请日：2017-01-12

Applicant: ENEOS CORPORATION ,  TOKYO OHKA KOGYO CO., LTD.

Inventor： Shinichi Komatsu ,  Kunihiro Noda ,  Hiroki Chisaka ,  Dai Shiota

IPC: C08G73/10 ,  C08J5/18 ,  C08K5/00 ,  C09D179/08

Abstract: A method for producing a polyimide film includes: obtaining a polyamic acid solution having a viscosity of 5 to 150 cps by preparing a raw material mixture liquid containing a solvent, a tetracarboxylic dianhydride represented by a specific general formula, and an aromatic diamine represented by a specific general formula, and has a total content of the tetracarboxylic dianhydride and aromatic diamine of 15% by mass or less, and reacting the tetracarboxylic dianhydride and aromatic diamine with each other in the raw material mixture liquid forming a polyamic acid having a repeating unit represented by a specific general formula; obtaining a polyimide-forming mixture liquid by adding a compound represented by a specific general formula to the polyamic acid solution; and obtaining a polyimide film represented by a specific general formula by forming a film made of the polyimide-forming mixture liquid, followed by imidization of the polyamic acid in the film.

公开(公告)号：US11525037B2

公开(公告)日：2022-12-13

申请号：US16608742

申请日：2018-04-23

Applicant: ENEOS CORPORATION

Inventor： Shinichi Komatsu ,  Asako Kyobu

IPC: C08G73/10 ,  C08L79/08 ,  C07D493/10

Abstract: A tetracarboxylic dianhydride represented by the following general formula (1): [in the formula (1), R1, R2, and R3 each independently represent a hydrogen atom and the like, and n represents an integer of 0 to 12], wherein a ratio of a summed amount of a specific stereoisomer (A) and a specific stereoisomer (B) is 50% by mole or more relative to a total amount of stereoisomers based on three-dimensional configurations of two norbornane rings in the general formula (1), and a content ratio of the stereoisomer (A) is 30% by mole or more relative to the total amount of the stereoisomers.