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. 28, 2021
Filed:
Dec. 31, 2015
Kolon Industries, Inc., Gwacheon-si, KR;
Jong Won Yang, Yongin-si, KR;
Hak Gee Jung, Yongin-si, KR;
KOLON INDUSTRIES, INC., Seoul, KR;
Abstract
The present invention relates to a polyamide-imide precursor, a polyamide-imide obtained by imidizing the same, a polyamide-imide film, and an image display device including the film. The polyamide-imide precursor includes, in a molecular structure thereof, a first block, obtained by copolymerizing monomers including dianhydride and diamine, a second block, obtained by copolymerizing monomers including an aromatic dicarbonyl compound and the diamine, and a third block, obtained by copolymerizing monomers including the aromatic dicarbonyl compound and aromatic diamine. The dianhydride for forming the first block includes 2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), and the diamine for forming the first block and the second block includes 9,9-bis(3-fluoro-4-aminophenyl)fluorene (FFDA).