US 11,952,343 B2
Diamine compound, polyimide precursor using same, and polyimide film
Kichul Koo, Daejeon (KR); and Kyunghwan Kim, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/272,209
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Dec. 17, 2019, PCT No. PCT/KR2019/017841
§ 371(c)(1), (2) Date Feb. 26, 2021,
PCT Pub. No. WO2020/130552, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10-2018-0163793 (KR), filed on Dec. 18, 2018; and application No. 10-2019-0167742 (KR), filed on Dec. 16, 2019.
Prior Publication US 2021/0317082 A1, Oct. 14, 2021
Int. Cl. C08J 5/18 (2006.01); C07D 209/48 (2006.01); C07D 401/14 (2006.01); C07D 403/14 (2006.01); C08G 73/10 (2006.01)
CPC C07D 209/48 (2013.01) [C07D 401/14 (2013.01); C07D 403/14 (2013.01); C08G 73/1003 (2013.01); C08J 5/18 (2013.01); C08J 2379/08 (2013.01)] 15 Claims
 
1. A diamine represented by the formula 1

OG Complex Work Unit Chemistry
In the formula 1,
Z1 to Z8 are each independently a carbon atom or a nitrogen atom, with the proviso that Z1 to Z8 are not nitrogen atoms at the same time, R1, R2, R3 and R4 are each independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkenyl group having 1 to 10 carbon atoms, and an aryl group having 6 to 18 carbon atoms, n1, n2, n3 and n4 are each independently an integer of 0 to 4, and X is a single bond or a functional group selected from the group consisting of O, S, S—S, C(═O), —C(═O)O—, CH(OH), S(═O)2, Si(CH3)2, CR′R″, C(═O)NH and a combination thereof, wherein R′ and R″ are each independently selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms and a fluoroalkyl group having 1 to 10 carbon atoms.