公开(公告)号：US20210009760A1

公开(公告)日：2021-01-14

申请号：US17037012

申请日：2020-09-29

Applicant: KANEKA CORPORATION

Inventor： Hirofumi Nakayama ,  Mari Uno

IPC: C08G73/10 ,  C08G77/455 ,  C08J5/18 ,  B32B27/28

Abstract: A polyamic acid according to one or more embodiments of the present invention contains a structural unit represented by general formula (1) and a structural unit represented by general formula (2). In general formula (1), the plurality of R1s are each independently a hydrogen atom, a monovalent aliphatic group or an aromatic group. In general formula (2), the plurality of R2s are each independently an alkyl group having 1-3 carbon atoms or an aryl group having 6-10 carbon atoms. In general formulas (1) and (2), X is a tetravalent organic group. In general formula (2), the plurality of Ys are each independently an alkylene group having 1-3 carbon atoms or an arylene group having 6-10 carbon atoms, and m is an integer of 51-199.

公开(公告)号：US12104017B2

公开(公告)日：2024-10-01

申请号：US17037012

申请日：2020-09-29

Applicant: KANEKA CORPORATION

Inventor： Hirofumi Nakayama ,  Mari Uno

IPC: C08G73/10 ,  B32B27/28 ,  C08G77/455 ,  C08J5/18

CPC classification number: C08G73/1007 ,  B32B27/281 ,  C08G73/106 ,  C08G73/1067 ,  C08G73/1082 ,  C08G77/455 ,  C08J5/18 ,  B32B2250/02 ,  B32B2307/306 ,  B32B2307/412 ,  B32B2457/202 ,  B32B2457/204 ,  B32B2457/206 ,  B32B2457/208

Abstract: A polyamic acid according to one or more embodiments of the present invention contains a structural unit represented by general formula (1) and a structural unit represented by general formula (2). In general formula (1), the plurality of R1s are each independently a hydrogen atom, a monovalent aliphatic group or an aromatic group. In general formula (2), the plurality of R2s are each independently an alkyl group having 1-3 carbon atoms or an aryl group having 6-10 carbon atoms. In general formulas (1) and (2), X is a tetravalent organic group. In general formula (2), the plurality of Ys are each independently an alkylene group having 1-3 carbon atoms or an arylene group having 6-10 carbon atoms, and m is an integer of 51-199.

公开(公告)号：US11274182B2

公开(公告)日：2022-03-15

申请号：US16611496

申请日：2018-05-02

Applicant: KANEKA CORPORATION

Inventor： Hirofumi Nakayama ,  Mari Uno

IPC: C08G73/10 ,  C08J5/18

Abstract: A polyamic acid that has a fluorine atom content of 25 wt % or less and an amount of a fluorine-containing diamine in the polyamic acid is 70 mol % or more with respect to 100 mol % of a sum of diamine components. The total number of moles of tetracarboxylic acid component in the polyamic acid is 0.960 times or more and less than 1.000 time total number of moles of diamine component. The polyamic acid preferably has the structural unit represented by formula (1) and the structural unit represented by formula (2). The polyamic acid may contain trans-1,4-cyclohexanediamine as the diamine component.