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:
May. 10, 2022
Filed:
Apr. 11, 2017
Skc Co., Ltd., Gyeonggi-do, KR;
Jin Woo Lee, Gyeonggi-do, KR;
Dong Jin Lim, Gyeonggi-do, KR;
Jae In Ahn, Gyeonggi-do, KR;
Jong Ho Lee, Gyeonggi-do, KR;
Sang Il Kim, Gyeonggi-do, KR;
Sun Hwan Kim, Incheon, KR;
Dae Sung Oh, Seoul, KR;
Dawoo Jeong, Gyeonggi-do, KR;
SKC CO., LTD., Gyeonggi-do, KR;
Abstract
Disclosed herein are a polyamide-imide film which is transparent and exhibits superior mechanical properties such as surface hardness, etc. and a method of preparing the same. The polyamide-imide film a copolymer of an aromatic diamine, an aromatic dianhydride, and an aromatic dicarbonyl compound, wherein the aromatic diamine and the aromatic dianhydride forms an imide unit; the aromatic diamine and the aromatic dicarbonyl compound forms an amide unit; and the amide unit accounts for 50-70 mol % of 100 mol % of the units of the copolymer, thereby exhibiting transparency and superior mechanical properties including surface hardness.