Window film composition, flexible window film formed therefrom and flexible display device containing same
Provided are a window film composition, a flexible window film formed therefrom and a flexible display device containing the same, the composition comprising: a crosslinking agent represented by RX-X—Z—Y-RY (RX and RY each independently represent a glycidyl group, a glycidyl group-containing functional group, an alicyclic epoxy group or an alicyclic epoxy group-containing functional group); an epoxy group-containing siloxane resin; and an initiator.
1. A composition for window films, comprising: a crosslinking agent represented by any one of Formulae 1-3, and 1-5 to 1-7; an epoxy group-containing siloxane resin represented by Formula 2-2; and an initiator,
(R 1 SiO 3/2 ) x (R 3 R 4 SiO 2/2 ) z <Formula 2-2>
where in Formula 2-2, R 1 is an epoxy group;
R 3 and R 4 are each independently an expoxy group, a hydrogen atom, a substituted or unsubstituted C 1 to C 20 alkyl group, a substituted or unsubstituted C 2 to C 20 alkenyl group, a substituted or unsubstituted C 2 to C 20 alkynyl group, a substituted or unsubstituted C 3 to C 20 cycloalkyl group, a substituted or unsubstituted C 6 to C 20 aryl group, a substituted or unsubstituted C 7 to C 20 arylalkyl group, a substituted or unsubstituted C 6 to C 20 hetero-aryl group, or a substituted or unsubstituted C 7 to C 20 hetero-arylalkyl group; and
0<x<1, 0<z<1, and x+z=1).
2. The composition for window films according to claim 1 , wherein the epoxy group-containing siloxane resin is represented by any one of Formula 2-2A to Formula 2-2F:
(EcSiO 3/2 ) x ((Me) 2 SiO 2/2 ) z <Formula 2-2A>
(EcSiO 3/2 ) x ((Et) 2 SiO 2/2 ) z <Formula 2-2B>
(EcSiO 3/2 ) x (MeEtSiO 2/2 ) z <Formula 2-2C>
(GpSiO 3/2 ) x ((Me) 2 SiO 2/2 ) z <Formula 2-2D>
(GpSiO 3/2 ) x ((Et) 2 SiO 2/2 ) z <Formula 2-2E>
(GpSiO 3/2 ) x (MeEtSiO 2/2 ) z <Formula 2-2F>
where in Formula 2-2A to Formula 2-2F, Ec is a (3,4-epoxycyclohexyl)ethyl group, Gp is a 3-glycidoxy propyl group, Me is a methyl group, Et is an ethyl group, 0<x<1, 0<z<1, and x+z=1.
3. A flexible window film comprising a base layer and a coating layer formed on one surface of the base layer,
wherein the coating layer is formed of the composition for window films according to claim 1 .
4. The flexible window film according to claim 3 , further comprising: an adhesive layer formed on the other surface of the base layer.
5. A flexible display comprising the flexible window film according to claim 3 .
6. The flexible display according to claim 5 , comprising: a display part; an adhesive layer formed on the display part; a polarizing plate formed on the adhesive layer; a touchscreen panel formed on the polarizing plate; and the flexible window film formed on the touchscreen panel.
7. The flexible display according to claim 5 , comprising: a display part; a touchscreen panel formed on the display part; a polarizing plate formed on the touchscreen panel; and the flexible window film formed on the polarizing plate.
8. The flexible display according to claim 5 , comprising: a display part; an adhesive layer formed on the display part; and the flexible window film formed on the adhesive layer.
9. The flexible display according to claim 8 , further comprising: a polarizing plate disposed at an upper or lower side of the display part.