Invention Grant
- Patent Title: Polyimide precursor, polyimide, varnish, polyimide film, and substrate
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Application No.: US14426953Application Date: 2013-09-10
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Publication No.: US10174166B2Publication Date: 2019-01-08
- Inventor: Takuya Oka , Yukinori Kohama , Yoshiyuki Watanabe , Nobuharu Hisano
- Applicant: Ube Industries, Ltd.
- Applicant Address: JP Ube-shi
- Assignee: UBE INDUSTRIES, LTD.
- Current Assignee: UBE INDUSTRIES, LTD.
- Current Assignee Address: JP Ube-shi
- Agency: Knobbe Martens Olson & Bear LLP
- Priority: JP2012-198935 20120910
- International Application: PCT/JP2013/074420 WO 20130910
- International Announcement: WO2014/038714 WO 20140313
- Main IPC: C08G73/10
- IPC: C08G73/10 ; C08J5/18 ; C09D179/08 ; C08G73/06 ; C08G73/14 ; C08G73/16

Abstract:
A polyimide precursor comprising a repeating unit represented by the following chemical formula (1): in which A is a divalent group of an aromatic diamine or an aliphatic diamine, from which amino groups have been removed; and X1 and X2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms, wherein the polyimide precursor comprises at least one type of repeating unit represented by the chemical formula (1) in which A is a group represented by chemical formula (2) or (3): in which m independently represents 0 to 3 and n independently represents 0 to 3; Y1, Y2 and Y3 each independently represent at least one selected from the group consisting of hydrogen atom, methyl group and trifluoromethyl group; and Q and R each independently represent direct bond, or at least one of —NHCO—, —CONH—, —COO— and —OCO—, in which Z and W each independently represent a divalent aromatic group having 6 to 18 carbon atoms; and Y4 represents hydrogen atom, or a monovalent organic group.
Public/Granted literature
- US20150361222A1 POLYIMIDE PRECURSOR, POLYIMIDE, VARNISH, POLYIMIDE FILM, AND SUBSTRATE Public/Granted day:2015-12-17
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