US 12,412,957 B2
Aqueous coating composition including poly(vinlamide)-based copolymer, crosslinking agent, and inorganic particles, method for manufacturing separator by using same, separator, and lithium battery
Jayeon Gu, Yongin-si (KR); Hana Kim, Yongin-si (KR); Byungmin Lee, Yongin-si (KR); and Minho Cho, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Appl. No. 18/013,588
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
PCT Filed May 13, 2022, PCT No. PCT/KR2022/095099
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/240275, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 10-2021-0062752 (KR), filed on May 14, 2021.
Prior Publication US 2024/0250384 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/446 (2021.01); H01M 10/052 (2010.01); H01M 50/403 (2021.01); H01M 50/449 (2021.01); H01M 50/491 (2021.01)
CPC H01M 50/446 (2021.01) [H01M 10/052 (2013.01); H01M 50/403 (2021.01); H01M 50/449 (2021.01); H01M 50/491 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A separator coating composition, comprising:
a binder including a poly(vinylamide)-based copolymer which has aqueous crosslinking reactivity;
a multifunctional crosslinking agent having at least bifunctionality;
inorganic particles; and
water,
wherein the poly(vinylamide)-based copolymer includes a repeating unit derived from a vinylamide monomer and a repeating unit derived from a crosslinking reactive group-containing monomer,
wherein the vinylamide monomer is selected from vinylpyrrolidone, vinylcaprolactam and mixtures thereof,
wherein the crosslinking reactive group includes at least one selected from a carboxyl group, an isocyanate group, a hydroxyl group, and an oxazoline group, and
wherein the multifunctional crosslinking agent includes at least one selected from ethylene glycol, diethylene glycol, propylene glycol, triethylene glycol, tetra ethylene glycol, propanediol, dipropylene glycol, polypropylene glycol, glycerin, polyglycerin, butanediol, heptanediol, hexanediol trimethylolpropane, pentaerythritol, sorbitol, pentaerythritol triallyl ether, pentaerythritol triacrylate, pentaerythritol tetraacrylate, and methylene bisacrylamide.