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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 11267942 B1

PDFFull Text
Date of Patent:
Mar. 08, 2022

Filed:

Feb. 02, 2018

Polyamide-imide film

Applicant:

Skc Co., Ltd., Gyeonggi-do, KR;

Inventors:

Sunhwan Kim, Incheon, KR;

Dae Seong Oh, Seoul, KR;

Jin Woo Lee, Gyeonggi-do, KR;

Dawoo Jeong, Gyeonggi-do, KR;

Dong Jin Lim, Gyeonggi-do, KR;

Assignee:

SKC CO., LTD., Gyeonggi-do, KR;

Attorney:

IP & T Group LLP

Primary Examiner:

Gregory Listvoyb

Int. Cl.
CPC ...
C08G 73/14 (2006.01); C08J 5/18 (2006.01); B29C 39/24 (2006.01); B29C 39/38 (2006.01); B29C 39/42 (2006.01); B29C 39/44 (2006.01); C08G 73/10 (2006.01); C08L 79/08 (2006.01); B29C 41/00 (2006.01); B29K 77/00 (2006.01); B29K 105/00 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 39/24 (2013.01); B29C 39/38 (2013.01); B29C 39/42 (2013.01); B29C 39/44 (2013.01); C08G 73/1039 (2013.01); C08G 73/14 (2013.01); C08L 79/08 (2013.01); B29C 41/003 (2013.01); B29K 2077/00 (2013.01); B29K 2105/0094 (2013.01); C08J 2379/08 (2013.01); C08L 2201/10 (2013.01); C08L 2203/16 (2013.01);
Abstract

One embodiment may provide a polyamide-imide film which is colorless and transparent while having an adequate level of solubility and excellent mechanical properties, the polyamide-imide film comprising a polyamide-imide polymer formed by polymerizing an aromatic diamine compound, an aromatic dianhydride compound and a dicarbonyl compound, wherein, for a square cross-section of 1 cm×1 cm and a thickness of 30 um to 100 mm, the polyamide-imide film has a dissolution time of 5-60 minutes in 10 ml of dimethylacetamide (DMAc), and for a thickness of 50 mm, the polyamide-imide film has a yellowness of at most 5, a haze of at most 2%, a permeability of at least 85% and a modulus of at least 5.0 GPa.

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