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:
Aug. 14, 2018
Filed:
Apr. 20, 2015
Kaneka Corporation, Osaka, JP;
Japan Aerospace Exploration Agency, Tokyo, JP;
Masahiko Miyauchi, Osaka, JP;
Yuichi Ishida, Tokyo, JP;
Toshio Ogasawara, Tokyo, JP;
Rikio Yokota, Kanagawa, JP;
Kaneka Corporation, , JP;
Abstract
Provided is a varnish including 1 to 500 parts by weight of an aromatic tetracarboxylic acid diester (A) represented by General Formula (1), 1 to 450 parts by weight of 2-phenyl-4,4'-diaminodiphenyl ether (B), 1 to 100 parts by weight of a 4-(2-phenylethynyl)phthalic acid monoester (C) represented by General Formula (2), and 100 parts by weight of an organic solvent having a boiling point of 150° C. or less at 1 atmosphere or a mixture of two or more of the organic solvents (D). The components (A), (B), and (C) are dissolved in the varnish. (In the formula, Ris an aromatic tetracarboxylic acid diester residue; Rand Rare the same or different and are an aliphatic organic group or an aromatic organic group.) (In the formula, Rand Rare a hydrogen atom, an aliphatic organic group, or an aromatic organic group).