US 11,814,483 B2
Separation membrane comprising coating layer, method of preparing same, and battery using same
In Sik Jeon, Suwon-si (KR); Jin Kyu Park, Suwon-si (KR); Tae Joon Park, Suwon-si (KR); Jun Ho Chung, Suwon-si (KR); and Mok Yun Jin, Suwon-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Oct. 19, 2020, as Appl. No. 17/073,664.
Application 17/073,664 is a continuation of application No. 14/418,785, abandoned, previously published as PCT/KR2013/006894, filed on Jul. 31, 2013.
Claims priority of application No. 10-2012-0084536 (KR), filed on Aug. 1, 2012; and application No. 10-2012-0126384 (KR), filed on Nov. 9, 2012.
Prior Publication US 2021/0036294 A1, Feb. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 73/10 (2006.01); C09D 179/08 (2006.01); H01M 50/446 (2021.01); H01M 50/414 (2021.01); H01M 50/443 (2021.01); H01M 50/451 (2021.01); H01M 50/489 (2021.01); H01M 10/052 (2010.01)
CPC C08G 73/1042 (2013.01) [C08G 73/105 (2013.01); C08G 73/1039 (2013.01); C08G 73/1064 (2013.01); C08G 73/1067 (2013.01); C08G 73/1071 (2013.01); C08G 73/1078 (2013.01); C08G 73/1082 (2013.01); C09D 179/08 (2013.01); H01M 50/414 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/489 (2021.01); H01M 10/052 (2013.01); H01M 2220/30 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A separator, comprising:
a polyolefin-based substrate film, and
a coating layer positioned on at least one of surface of the polyolefin-based substrate film,
wherein the coating layer is formed from a composition comprising an organic binder including a polyamic acid represented by any one of the following Chemical Formulae 5 to 9, a low boiling point solvent having a boiling point less than 150° C., and a high boiling point solvent having a boiling point of 150° C. or more:

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 5, x is an integer of 15 to 5000,

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 6, x is an integer of 15 to 5000,

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 7, x is an integer of 15 to 5000,

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 8, x is an integer of 15 to 5000, y is an integer of 15 to 5000, and a ratio x:y is 5:5 to 1:9, and

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 9:
x is an integer of 15 to 5000, and y is an integer of 15 to 5000, and
a ratio of repeating units x to y is 9:1 to 7:3.