US 11,732,142 B2
Anti-reflective film, polarizing plate, and display apparatus
Jinseok Byun, Daejeon (KR); Kyung Moon Ko, Daejeon (KR); Sang Heon Lee, Daejeon (KR); Kwangseok Seo, Daejeon (KR); and Yeongrae Chang, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/978,458
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed May 14, 2019, PCT No. PCT/KR2019/006006
§ 371(c)(1), (2) Date Sep. 4, 2020,
PCT Pub. No. WO2019/221573, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 10-2018-0057299 (KR), filed on May 18, 2018; and application No. 10-2019-0055866 (KR), filed on May 13, 2019.
Prior Publication US 2021/0040330 A1, Feb. 11, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08K 7/26 (2006.01); C09D 5/00 (2006.01); C09D 133/10 (2006.01)
CPC C09D 5/006 (2013.01) [C09D 133/10 (2013.01); C08K 7/26 (2013.01); C08K 2201/003 (2013.01); C08K 2201/011 (2013.01)] 16 Claims
 
1. An anti-reflective film comprising a hard coating layer, and a low-refractive index layer satisfying Equation 1,
0.2% p≥ΔR=|R1−R0|  [Equation 1]
wherein in the Equation 1,
R0 is an average reflectance % of the low-refractive index layer before performing a rubbing test as measured in a wavelength range of 380 to 780 nm, and
R1 is an average reflectance % of the low-refractive index layer after performing the rubbing test as measured in a wavelength range of 380 to 780 nm, wherein the rubbing test is performed by rubbing a surface of the-low refractive index layer by applying a load of 500 g to a steel wool and reciprocating ten times at a speed of 33 rpm, and
% p=ΔR, wherein AR is the degree of change of the average reflectance before and after the rubbing test,
wherein the low refractive index layer comprises a binder resin, and two or more groups of hollow inorganic particles dispersed in the binder resin and having different particle diameters,
wherein the two or more groups of hollow inorganic particles having different particle diameters include a first group of hollow inorganic particles having a particle diameter of 40 nm to 60 nm as measured by Dynamic Light Scattering (DLS), and a second group of hollow inorganic particles having a particle diameter of 65 nm to 100 nm as measured by Dynamic Light Scattering (DLS), and
wherein a weight ratio between the first group of hollow inorganic particles and the second group of hollow inorganic particles is 7:3 to 3:7.