US 12,466,919 B2
Polyamic acid, polyimide, and element formed therefrom
Chuan-Jen Fu, Kaohsiung (TW); Shih-Wei Lee, Kaohsiung (TW); Hsiao-Chu Lin, Kaohsiung (TW); Shu-Mei Yang, Kaohsiung (TW); Shih-Hung Huang, Kaohsiung (TW); and Tzu-Yuan Shih, Kaohsiung (TW)
Assigned to LCY CHEMICAL CORP., Kaohsiung (TW)
Filed by LCY CHEMICAL CORP., Kaohsiung (TW)
Filed on Aug. 3, 2021, as Appl. No. 17/393,031.
Claims priority of application No. 110113533 (TW), filed on Apr. 15, 2021.
Prior Publication US 2022/0348717 A1, Nov. 3, 2022
Int. Cl. C08G 73/00 (2006.01); C08G 73/10 (2006.01); G02F 1/1337 (2006.01)
CPC C08G 73/1078 (2013.01) [C08G 73/1021 (2013.01); C08G 73/1032 (2013.01); C08G 73/1042 (2013.01); C08G 73/105 (2013.01); G02F 1/133723 (2013.01)] 10 Claims
 
1. A polyimide comprising at least one repeating unit selected from the group consisting of the following general formulas M, N, and O:

OG Complex Work Unit Chemistry
wherein X is a residue derived from TCA (3-(Carboxymethyl)-1,2,4-cyclopentanetricarboxylic acid 1,4:2,3-dianhydride) represented by formula I,

OG Complex Work Unit Chemistry
Y1 is a residue derived from a diamine with a cardo structure,
Y2 is a residue derived from a diamine represented by formula IV,

OG Complex Work Unit Chemistry
and
Y3 is a residue derived from a diamine represented by formula V,

OG Complex Work Unit Chemistry
wherein each R1 is independently *—H, *—F, *—Cl, *—CH3, or *—CF3;
R2 is *—C(O)NH—*;
R3 and R4 are each independently *—O—* or *—C(O)O—*;
Ar is

OG Complex Work Unit Chemistry
R5 is *—CH3 or *—CF3;
Z is *—NH—* or *—O—*:
i, j, p, q and r are 0 or 1;
k is an integer of 0-4;
wherein molar fractions of the repeating units represented by the general formulas M, N, and O to all of the repeating units are m, n, and o, respectively, wherein m is 0-100%, n is 20-100%, and o is 0-50%.