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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.:

US 11078378 B1

PDFFull Text
Date of Patent:
Aug. 03, 2021

Filed:

Mar. 28, 2016

Polyimide film, polyimide varnish, and product and layered product using the polyimide film

Applicant:

Asahi Kasei Kabushiki Kaisha, Tokyo, JP;

Inventors:

Satoshi Kato, Tokyo, JP;

Toshiaki Nagasawa, Tokyo, JP;

Assignee:

ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP.

Primary Examiner:

Alicia J Sawdon

Int. Cl.
CPC ...
C09D 179/08 (2006.01); B32B 27/28 (2006.01); C08G 73/10 (2006.01); B32B 7/02 (2019.01); B32B 27/34 (2006.01); C08J 7/04 (2020.01); C08J 7/046 (2020.01); C08J 7/048 (2020.01); G06F 3/041 (2006.01);
U.S. Cl.
CPC ...
C09D 179/08 (2013.01); B32B 7/02 (2013.01); B32B 27/281 (2013.01); B32B 27/34 (2013.01); C08G 73/1042 (2013.01); C08G 73/1053 (2013.01); C08G 73/1064 (2013.01); C08G 73/1071 (2013.01); C08J 7/046 (2020.01); C08J 7/048 (2020.01); C08J 7/0427 (2020.01); G06F 3/041 (2013.01); B32B 2307/412 (2013.01); B32B 2457/208 (2013.01); C08G 73/1075 (2013.01); C08J 2379/08 (2013.01); C08J 2479/08 (2013.01); G06F 2203/04102 (2013.01);
Abstract

To provide polyimide films that contain polyimide good in solubility in solvent and excel lent in workability and that are colorless, transparent and excellent in toughness, polyimide varnishes, and products and layered products using the polyimide film, the polyimide film is characterized by containing polyimide expressed by following general formula (1), and containing as A in the general formula (1), a structure expressed by following general formula (A-1), for example, structure expressed by following general formula (A-5). Herein, in the general formula (1), A represents a bivalent organic group, B represents a tetravalent organic group, and n is 2 or more.

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