US 12,473,411 B2
Optical multilayer structure, method of manufacturing the same and window cover film comprising the same
Kyu Seok Han, Daejeon (KR); Cheol Woo Kim, Daejeon (KR); So Young Lee, Daejeon (KR); Jeong Min Choi, Daejeon (KR); and Sin Woo Kim, Daejeon (KR)
Assigned to SK INNOVATION CO., LTD., Seoul (KR); and SK IE TECHNOLOGY CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR); and SK IE TECHNOLOGY CO., LTD., Seoul (KR)
Filed on Apr. 11, 2023, as Appl. No. 18/298,729.
Claims priority of application No. 10-2022-0044420 (KR), filed on Apr. 11, 2022.
Prior Publication US 2023/0323058 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 7/04 (2020.01); C08J 7/043 (2020.01); C08J 7/18 (2006.01); C08K 5/541 (2006.01); C09D 7/63 (2018.01); C09D 183/06 (2006.01)
CPC C08J 7/042 (2013.01) [C08J 7/043 (2020.01); C08J 7/18 (2013.01); C08K 5/541 (2013.01); C09D 7/63 (2018.01); C09D 183/06 (2013.01); C08J 2379/08 (2013.01); C08J 2383/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical multilayer structure comprising:
a substrate layer;
a hard coating layer formed on a first surface of the substrate layer;
a low-reflective adhesion reinforcement layer formed on the hard coating layer and comprises a siloxane-based compound; and
a water repellent layer formed on the low-reflective adhesion reinforcement layer and comprises an alkoxysilane-based compound containing a fluorine atom,
wherein the optical multilayer structure has a reflectance of 4% or less in accordance with ASTM E1164, and
the optical multilayer structure satisfies the following Equation 1:
25%≥ΔE=(E0−E1/E0)×100  [Equation 1]
wherein E0 is a water contact angle of the water repellent layer, and E1 is a water contact angle of the water repellent layer after applying a load of 1 kg to a Minoan rubber stick having a diameter of 4 mm and rubbing the rubber stick 3000 times reciprocatingly over a distance of 15 mm at a speed of 50 rpm on a surface of the water repellent layer.