Patent ID: 11960159
Assignee: SK IE TECHNOLOGY CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC G  C | IPC C  G

Claim 0:
1. A polyamideimide film comprising an amideimide structure derived from a dianhydride, a diamine, and an aromatic diacid dichloride,
wherein the dianhydride comprises an aromatic dianhydride and a cycloaliphatic dianhydride, and 10 to 50 mol of the aromatic dianhydride and 10 to 60 mol of the cycloaliphatic dianhydride are included with respect to 100 mol of the diamine,
wherein the diamine comprises a first fluorine-based aromatic diamine which forms an amine-terminated polyamide oligomer intermediate with the aromatic diacid dichloride in deriving the amideimide structure,
wherein a chlorine content in the film is 5 to 33 ppm; an initial yellow index of the film is 2 or less; and a yellow index change amount ΔYI satisfies the following equation 1, the yellow index change amount being measured in accordance with UV weathering accelerated test ASTM E313 after repeating a process of irradiating 0.55 W/m2 of ultraviolet A rays having a wavelength of 340 nm at 40° C. for 20 hours and then blocking ultraviolet A rays having a wavelength of 340 nm for 4 hours three times:

ΔYI≤4   [Equation 1]

wherein ΔYI is the yellow index after a UV weathering accelerated test—the initial yellow index.