US 11,898,010 B2
Polyimides, ketone-containing alicyclic dianhydrides and applications thereof
Jyh-Chien Chen, Hsinchu (TW); Hsiang Jung Lee, Taipei (TW); and Kai-Cheng Zhong, Kaohsiung (TW)
Assigned to National Taiwan University of Science and Technology, Taipei (TW)
Filed by National Taiwan University of Science and Technology, Taipei (TW)
Filed on Jul. 23, 2021, as Appl. No. 17/383,782.
Claims priority of application No. 110116598 (TW), filed on May 7, 2021.
Prior Publication US 2022/0372228 A1, Nov. 24, 2022
Int. Cl. C08G 73/10 (2006.01); C09D 179/08 (2006.01); C07D 493/08 (2006.01); C08J 5/18 (2006.01)
CPC C08G 73/1078 (2013.01) [C07D 493/08 (2013.01); C08G 73/1007 (2013.01); C08J 5/18 (2013.01); C09D 179/08 (2013.01); C08J 2379/08 (2013.01)] 5 Claims
 
1. A polyimide comprises at least one of below repeated structures as formula (1) and formula (2):

OG Complex Work Unit Chemistry
wherein in formula (1) or in formula (2):
R1, R2, R3 and R4 represent hydrogen atom and/or carbon containing functional group including C1 to C4 alkanes;
R5 represents aliphatic group or aromatic group; and
n represents any positive integer.