US 12,227,620 B2
Polymers for use in electronic devices
Viacheslav V Diev, Wilmington, DE (US); Nora Sabina Radu, Landenberg, PA (US); Michael Henry Howard, Jr., Montchanin, DE (US); and Rakesh Nambiar, West Chester, PA (US)
Assigned to DUPONT ELECTRONICS, INC., Wilmington, DE (US)
Appl. No. 17/594,424
Filed by DUPONT ELECTRONICS, INC., Wilmington, DE (US)
PCT Filed Apr. 21, 2020, PCT No. PCT/US2020/029056
§ 371(c)(1), (2) Date Oct. 15, 2021,
PCT Pub. No. WO2020/219411, PCT Pub. Date Oct. 29, 2020.
Claims priority of provisional application 62/898,851, filed on Sep. 11, 2019.
Claims priority of provisional application 62/837,456, filed on Apr. 23, 2019.
Prior Publication US 2022/0325045 A1, Oct. 13, 2022
Int. Cl. C08G 73/10 (2006.01); C08J 5/18 (2006.01)
CPC C08G 73/1032 (2013.01) [C08G 73/1075 (2013.01); C08J 5/18 (2013.01); C08J 2379/08 (2013.01)] 20 Claims
 
1. A liquid composition comprising
(a) a polyamic acid having a repeat unit structure of Formula I

OG Complex Work Unit Chemistry
or Formula IV

OG Complex Work Unit Chemistry
where:
Ra represents one or more different tetracarboxylic acid component residues; and
Rb represents one or more different aromatic diamine residues or aromatic diisocyanate residues, wherein 5-100 mol % of Rb has Formula II

OG Complex Work Unit Chemistry
Rb1 represents one or more different aromatic diamine residues or aromatic diisocyanate residues, wherein 5-100 mol % of Rb1 has Formula V

OG Complex Work Unit Chemistry
where:
R1 through R6 are the same or different and are selected from the group consisting of haloalkyl and haloalkoxy;
R7 is the same or different at each occurrence and is selected from the group consisting of deuterium, halogen, cyano, hydroxyl, alkyl, deuterated alkyl, heteroalkyl, alkoxy, heteroalkoxy, haloalkyl, haloalkoxy, silyl, siloxy, hydrocarbon aryl, substituted hydrocarbon aryl, heteroaryl, substituted heteroaryl, vinyl, and allyl;
wherein any of R1 through R7 can be joined together with another of R1 through R7 on an adjacent ring to form a fused 5- or 6-membered alicyclic ring;
n is an integer from 0-10;
x1 and x4 are the same or different and are an integer from 0-3;
wherein x1>0 or x4>0;
x2 and x3 are the same or different and are an integer from 0-2;
* indicates a point of attachment; and
(b) at least one high-boiling aprotic solvent;
wherein a 10 μm polyimide film made from the liquid composition has a Tg greater than 400° C. and a b* value less than 10.0.