	US 12,404,421 B2
	Coating solutions and crosslinked polymer films
Michael Thomas Kwasny, Columbus, OH (US); Kenneth Hernandez, Stoneham, MA (US); Michael Henry Howard, Jr., Montchanin, DE (US); Joseph Casey Johnson, Pickerington, OH (US); and Kostantinos Kourtakis, Media, PA (US)
Assigned to DUPONT ELECTRONICS, INC., Wilmington, DE (US)
Filed by DUPONT ELECTRONICS, INC., Wilmington, DE (US)
Filed on Mar. 3, 2022, as Appl. No. 17/686,242.
Claims priority of provisional application 63/156,113, filed on Mar. 3, 2021.
Prior Publication US 2022/0282118 A1, Sep. 8, 2022
Int. Cl. C09D 179/08 (2006.01); C08K 3/04 (2006.01)

CPC C09D 179/08 (2013.01) [C08K 3/04 (2013.01)]

11 Claims

1. A coating solution comprising:

a soluble polymer comprising an imide group; and

a crosslinking precursor comprising:

a first amine group that is either reactive or passivated towards crosslinking; and

one or more additional amine groups, wherein the one or more additional amine groups has been passivated towards crosslinking by forming a moiety selected from the group consisting of carbamates, N-aryl amines, N,N-diaryl amines, benzyl amines, amides, sulfonamides, ammonium salts made from acids and silyl derivatives, such that the crosslinking precursor is un-reactive towards the soluble polymer having an imide group upon initial introduction and after activation, the crosslinking precursor can be chemically converted, thermally converted, photo-converted or dissociated to form at least two reactive amines.