公开(公告)号：US10662290B2

公开(公告)日：2020-05-26

申请号：US15540789

申请日：2015-12-30

Applicant: KOLON INDUSTRIES, INC.

Inventor： Jae Il Kim ,  Hak Gee Jung

IPC: C08G73/14 ,  C08J5/18 ,  C08G81/00 ,  C08G73/10

Abstract: This 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, and a second block, obtained by copolymerizing monomers including an aromatic dicarbonyl compound and aromatic diamine. The dianhydride includes biphenyltetracarboxylic acid dianhydride (BPDA) and 2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), and the diamine includes bistrifluoromethylbenzidine (TFDB).