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. 09, 2022
Filed:
Mar. 27, 2020
Applicant:
Ube Industries, Ltd., Ube, JP;
Inventors:
Takeshige Nakayama, Ube, JP;
Susumu Takasaki, Ube, JP;
Tomonori Nakayama, Ube, JP;
Kensuke Hiroshige, Ube, JP;
Assignee:
Ube Industries, Ltd., Ube, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08L 79/08 (2006.01); C08K 5/3445 (2006.01); B29C 39/00 (2006.01); B29C 39/38 (2006.01); C08G 73/10 (2006.01); B29K 79/00 (2006.01); B29K 105/00 (2006.01); B29L 31/34 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 39/006 (2013.01); B29C 39/38 (2013.01); C08G 73/10 (2013.01); C08K 5/3445 (2013.01); C08L 79/08 (2013.01); B29K 2079/08 (2013.01); B29K 2105/0002 (2013.01); B29K 2105/0073 (2013.01); B29L 2031/3475 (2013.01); C08J 2379/08 (2013.01); Y10T 428/31721 (2015.04);
Abstract
A method for producing an aqueous polyimide precursor solution includes forming a polyamic acid by the reaction of a tetracarboxylic acid component and a diamine component in water without organic solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.