US 12,411,267 B2
Optical multilayer structure and method for manufacturing the same
Chun Ho Kim, Daejeon (KR); and Cheol Min Yun, Daejeon (KR)
Assigned to SK Innovation Co., Ltd., Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR)
Filed on Jul. 11, 2023, as Appl. No. 18/220,473.
Claims priority of application No. 10-2022-0085413 (KR), filed on Jul. 12, 2022.
Prior Publication US 2024/0027653 A1, Jan. 25, 2024
Int. Cl. G02B 1/14 (2015.01); B32B 7/10 (2006.01); B32B 17/10 (2006.01); B32B 27/28 (2006.01); C08G 73/10 (2006.01); C09D 179/08 (2006.01)
CPC G02B 1/14 (2015.01) [B32B 7/10 (2013.01); B32B 17/10 (2013.01); B32B 27/281 (2013.01); C08G 73/1039 (2013.01); C08G 73/1042 (2013.01); C08G 73/106 (2013.01); C09D 179/08 (2013.01); B32B 2250/03 (2013.01); B32B 2457/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical multilayer structure comprising:
a substrate;
an adhesion promoting layer which is formed on any one or both surfaces of the substrate, the adhesion promoting layer being prepared from a composition comprising a polyimide resin; and
a shatterproof layer which is formed on the adhesion promoting layer, the shatterproof layer being prepared from a composition comprising a polyimide resin comprising a structural unit represented by the following Chemical Formula 1,
wherein the adhesion promoting layer and the shatterproof layer are connected by an imide bond:

OG Complex Work Unit Chemistry
wherein
R1 and R2 are independently of each other C1-5 alkyl which is unsubstituted or substituted with one or more halogens;
R3 and R4 are independently of each other C6-10 aryl which is unsubstituted or substituted with one or more halogens;
L1 and L2 are independently of each other C1-10 alkylene; and
x and y are independently of each other an integer of 1 or more.