US 12,466,951 B2
Polyamide resin film and resin laminate using the same
Il Hwan Choi, Daejeon (KR); Soonyong Park, Daejeon (KR); Young Ji Tae, Daejeon (KR); Youngseok Park, Daejeon (KR); and Bi Oh Ryu, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/972,389
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Dec. 26, 2019, PCT No. PCT/KR2019/018450
§ 371(c)(1), (2) Date Dec. 4, 2020,
PCT Pub. No. WO2020/159086, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0014020 (KR), filed on Feb. 1, 2019; application No. 10-2019-0014021 (KR), filed on Feb. 1, 2019; application No. 10-2019-0066620 (KR), filed on Jun. 5, 2019; application No. 10-2019-0173086 (KR), filed on Dec. 23, 2019; and application No. 10-2019-0174355 (KR), filed on Dec. 24, 2019.
Prior Publication US 2021/0230425 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 77/10 (2006.01); B32B 27/08 (2006.01); C08G 69/26 (2006.01); C08G 69/42 (2006.01); C08K 5/3475 (2006.01); C08K 5/3492 (2006.01); B32B 27/34 (2006.01)
CPC C08L 77/10 (2013.01) [B32B 27/08 (2013.01); C08G 69/265 (2013.01); C08G 69/42 (2013.01); C08K 5/3475 (2013.01); C08K 5/3492 (2013.01); B32B 27/34 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2307/412 (2013.01); B32B 2307/71 (2013.01); B32B 2457/20 (2013.01); C08L 2201/08 (2013.01); C08L 2201/10 (2013.01); C08L 2203/16 (2013.01); C08L 2203/20 (2013.01)] 13 Claims
 
1. A polyamide resin film in which a color difference variation rate (Eab1) value on the 1st day (n=1) of ultraviolet irradiation according to the following Mathematical Formula 1 is 2.5 or less:
Eabn={(Ln−Ln−1)2+(an−an−1)2+(bn−bn−1)2}1/2  [Mathematical Formula 1]
wherein,
Ln−1 is a lightness index of the polyamide resin film on the (n−1)th day of ultraviolet irradiation,
an−1 and bn−1 are color coordinates of the polyamide resin film on the (n−1)th day of ultraviolet irradiation,
Ln is a lightness index of the polyamide resin film on the n-th day of ultraviolet irradiation, and
an and bn are color coordinates of the polyamide resin film on the n-th day of ultraviolet irradiation,
wherein a haze measured according to ASTM D1003 for a specimen having a thickness of 45 μm or more and 55 μm or less is 1.5% or less,
wherein the polyamide resin film includes a polyamide resin containing aromatic amide repeating units derived from a combination of an aromatic diacyl compound and an aromatic diamine compound; and an ultraviolet light stabilizer,
wherein the ultraviolet light stabilizer includes one or more compounds selected from the group consisting of a triazine-based UV absorber, a triazole-based UV absorber, and a HALS-based UV absorber,
wherein the polyamide resin includes a first polyamide segment containing a repeating unit represented by Chemical Formula 1, or a block comprised thereof:

OG Complex Work Unit Chemistry
in the Chemical Formula 1, Ar1 is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms,
wherein the polyamide resin further includes a second polyamide segment containing a repeating unit represented by Chemical Formula 2, or a block comprised thereof:

OG Complex Work Unit Chemistry
in the Chemical Formula 2,
Ar2 is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms,
wherein the first polyamide segment and the second polyamide segment form a backbone chain including an alternating repeating unit represented by Chemical Formula 3:

OG Complex Work Unit Chemistry
in the Chemical Formula 3,
A is the first polyamide segment, and
B is the second polyamide segment, and
wherein based on the total repeating units contained in the polyamide resin, a content of the repeating unit represented by Chemical Formula 1 is 80 mol % to 85 mol %, and a content of the repeating unit represented by Chemical Formula 2 is 15 mol % to 20 mol %.