Hard coating film and window and image display device using same
The present invention relates to a hard coating film including a substrate and a hard coating layer provided on at least one surface of the substrate, in which the hard coating layer includes a cured product of a hard coating composition containing a fluorine-based UV-curable-functional-group-containing compound, dendritic acrylate, a conductive polymer, and a solvent, the conductive polymer being included in a specific amount, whereby the hard coating film is applicable to a flexible display device and can simultaneously exhibit hard coating performance and antifouling performance even in the form of a single layer that does not include a separate antifouling layer, and in particular, the high antifouling effect can be maintained even in the presence of variously changing environmental conditions, and to a window and an image display device using the same.
1. A hard coating film, comprising:
a substrate; and
a hard coating layer provided on at least one surface of the substrate,
wherein the hard coating layer comprises a cured product of a hard coating composition containing a fluorine-based UV-curable-functional-group-containing compound, dendritic acrylate, a conductive polymer, and a solvent,
a solid content of the conductive polymer is 0.05 to 5 wt % based on a total of 100 wt % of a solid content of the hard coating composition comprising the same, and
wherein the conductive polymer comprises a thiophene-based polymer.
2. The hard coating film of claim 1 , wherein the fluorine-based UV-curable-functional-group-containing compound comprises at least one selected from the group consisting of a perfluoro-alkyl-group-containing (meth)acrylate, a perfluoro-polyether-group-containing (meth)acrylate, a perfluoro-cycloaliphatic-group-containing (meth)acrylate, and a perfluoro-aromatic-group-containing (meth)acrylate.
3. The hard coating film of claim 1 , wherein a solid content of the fluorine-based UV-curable-functional-group-containing compound is 0.01 to 10 wt % based on a total of 100 wt % of a solid content of the hard coating composition.
4. The hard coating film of claim 1 , wherein a solid content of the dendritic acrylate is 3 to 90 wt % based on a total of 100 wt % of a solid content of the hard coating composition.
5. The hard coating film of claim 1 , wherein the hard coating composition further comprises at least one selected from the group consisting of a light-transmissive resin, a photoinitiator, and an additive.
6. The hard coating film of claim 1 , wherein a water contact angle of a surface of the hard coating layer of the hard coating film is 110° to 120°.
7. The hard coating film of claim 1 , wherein a water contact angle, measured after a surface of the hard coating layer of the hard coating film is rubbed and worn 3000 times under a load of 1 kg using an eraser for wear resistance testing, is 95° or more.
8. The hard coating film of claim 1 , wherein a water contact angle, measured after ethanol is dropped on a surface of the hard coating layer and then the surface of the hard coating layer is rubbed 3000 times under a load of 1 kg using an eraser for wear resistance testing, is 95° or more.
9. The hard coating film of claim 1 , wherein a surface resistance value when a voltage of 500 V is applied to a surface of the hard coating layer is 1E+8 Ω/□ to 1E+12 Ω/□.
10. The hard coating film of claim 1 , wherein a surface resistance value when a voltage of 500 V is applied to a surface of the hard coating layer after the hard coating film is allowed to stand under conditions of a temperature of 85° C. and a humidity of 85% for 15 days is 1E+8 Ω/□ to 5E+12 Ω/□.
11. A window comprising the hard coating film of any one of claims 1 and 2 to 10 .
12. An image display device comprising the window of claim 11 and a display panel, and further comprising a touch sensor and a polarizing plate between the window and the display panel.