The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2018
Filed:
Aug. 04, 2014
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Yuuki Sato, Kanagawa, JP;
Jun Mitadera, Kanagawa, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC., Chiyoda-ku, JP;
Abstract
A polyimide resin containing a repeating structural unit of the following formula (1), a repeating structural unit of the following formula (2), and a repeating structural unit of the following formula (A) or a repeating structural unit of the following formula (B), a content ratio of formula (1) with respect to the total of formula (1) and formula (2) being from 40 to 70 mol %, and a content ratio of formula (A) or formula (B) with respect to the total of formula (1) and formula (2) being more than 0 mol % and 25 mol % or less: wherein Rrepresents a divalent group having from 6 to 22 carbon atoms containing at least one alicyclic hydrocarbon structure; Rrepresents a divalent chain aliphatic group having from 5 to 20 carbon atoms; Rrepresents a divalent group containing at least one aromatic ring which is bonded to a monovalent or divalent electron-attracting group; Rrepresents a divalent group containing —SO— or —Si(R)(R)O— wherein Rand Reach independently represent a chain aliphatic group having from 1 to 3 carbon atoms, or a phenyl group; and X, X, X, and Xeach independently represent a tetravalent group having from 6 to 22 carbon atoms containing at least one aromatic ring.