US 9,811,192 B2
Composition for window film, flexible window film manufactured using the same and flexible display including the same
Chang Soo Woo, Uiwang-si (KR); Kyoung Ku Kang, Uiwang-si (KR); Min Hye Kim, Uiwang-si (KR); Ji Sun Im, Uiwang-si (KR); Seung Woo Jang, Uiwang-si (KR); and Dong Il Han, Uiwang-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si, Gyeonggi-do (KR); and SAMSUNG ELECTRONICS CO., LTD., Suwon-si, Gyeonggi-do (KR)
Filed on Nov. 24, 2015, as Appl. No. 14/951,328.
Claims priority of application No. 10-2014-0169211 (KR), filed on Nov. 28, 2014.
Prior Publication US 2016/0154436 A1, Jun. 2, 2016
Int. Cl. G02B 1/14 (2015.01); G06F 3/041 (2006.01); G06F 1/16 (2006.01); C09D 183/06 (2006.01); G02B 5/30 (2006.01); G02B 1/04 (2006.01); G06F 3/044 (2006.01); B32B 27/28 (2006.01); C08G 77/14 (2006.01)
CPC G06F 3/0412 (2013.01) [B32B 27/283 (2013.01); C08G 77/14 (2013.01); C09D 183/06 (2013.01); G02B 1/04 (2013.01); G02B 1/14 (2015.01); G02B 5/3033 (2013.01); G06F 1/1652 (2013.01); G06F 3/044 (2013.01); B32B 2307/40 (2013.01); B32B 2307/536 (2013.01); B32B 2307/71 (2013.01); C08L 2312/06 (2013.01); G06F 2203/04102 (2013.01)] 12 Claims
 
6. A flexible window film, comprising:
a base layer; and
a coating layer on a surface of the base layer,
wherein the flexible window film has a pencil hardness of about 7H or higher, a radius of curvature of about 5.0 mm or less, and a difference in yellow index before and after irradiation (ΔY.I.) of about 5.0 or less, and the coating layer is formed from a composition for a window film the composition for a window film comprising:
a siloxane resin represented by Formula, 4 or 7, or a mixture thereof; and
an initiator:
(R1SiO3/2)x(R9SiO3/2)z  Formula 4
wherein:
R1 is a crosslinkable functional group;
R9 is a UV absorbing functional group, or a UV absorbing functional group-containing group;
0<x<1;
0<z<1; and
x+z=1;
(R1SiO3/2)x(R2R3SiO2/2)y(R9SiO3/2)z  Formula 7
wherein:
R1 is a crosslinkable functional group;
R2 and R3 are each independently hydrogen, a crosslinkable functional group, an unsubstituted or substituted C1 to C20 alkyl group, or an unsubstituted or substituted C5 to C20 cycloalkyl group;
at least one of R2 and R3 is an unsubstituted or substituted C1 to C20 alkyl group;
R9 is a UV absorbing functional group, or a UV absorbing functional group-containing group;
0<x<1;
0<y<1;
0<z<1; and
x+y+z=1.