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:
Sep. 14, 2021
Filed:
Jan. 27, 2017
Arisawa Mfg. Co., Ltd., Niigata, JP;
Hiroyuki Matsuyama, Niigata, JP;
Yoshinori Sato, Niigata, JP;
Arisawa Mfg. Co., Ltd., Niigata, JP;
Abstract
The polyimide resin precursor in the present embodiment is a polyimide resin precursor obtained by allowing a diamine component and a tetracarboxylic acid anhydride component to react with each other, wherein based on the whole of the diamine component, the content of p-phenylenediamine is 75 mol % or more; the tetracarboxylic acid anhydride component includes an ester-containing tetracarboxylic acid anhydride represented by formula (1), and at least one biphenyltetracarboxylic acid anhydride selected from the group consisting of 3,4,3',4′-biphenyltetracarboxylic acid dianhydride, 2,3,3′,4′-biphenyltetracarboxylic acid dianhydride and 2,3,2′,3′-biphenyltetracarboxylic acid dianhydride; and based on the whole of the tetracarboxylic acid anhydride component, (i) the total of the content of the ester-containing tetracarboxylic acid anhydride and the content of the biphenyltetracarboxylic acid anhydride is 75 mol % or more, and (ii) the content of the ester-containing tetracarboxylic acid anhydride is 15 to 80 mol %, and the content of the biphenyltetracarboxylic acid anhydride is 85 to 20 mol %.