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. 23, 2022
Filed:
Feb. 26, 2021
Applicant:
Kolon Industries, Inc., Seoul, KR;
Inventors:
Doo Li Choi, Yongin-si, KR;
Hak Gee Jung, Yongin-si, KR;
Assignee:
KOLON INDUSTRIES. INC., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 73/22 (2006.01); C08J 5/18 (2006.01); C08G 73/10 (2006.01); C08G 61/12 (2006.01); C08L 79/08 (2006.01);
U.S. Cl.
CPC ...
C08G 73/22 (2013.01); C08G 61/122 (2013.01); C08G 73/1039 (2013.01); C08G 73/1042 (2013.01); C08G 73/1057 (2013.01); C08G 73/1067 (2013.01); C08G 73/1071 (2013.01); C08J 5/18 (2013.01); C08J 2379/04 (2013.01); C08J 2379/08 (2013.01); C08L 79/08 (2013.01); C08L 2201/10 (2013.01); C08L 2203/16 (2013.01);
Abstract
A polyimide-polybenzoxazole precursor solution, a polyimide-polybenzoxazole film, and a method of manufacturing the film are disclosed. A polyimide-polybenzoxazole film manufactured using the polyimide-polybenzoxazole precursor solution is formed by copolymerizing a unit structure of diamine and dianhydride and a unit structure of diaminophenol and dicarbonyl chloride in an organic solvent. The film is colorless and transparent, like conventional polyimide films, and can exhibit improved heat resistance and low birefringence.