Anti-reflective coating film
The present invention relates to an anti-reflective coating film. This anti-reflective coating film shows more improved interface adhesion and scratch resistance, which can be manufactured by a simple process.
1. An anti-reflective coating film, comprising: a first layer that comprises a first (meth)acrylate based binder and inorganic nanoparticles in the first (meth)acrylate based binder and that has infiltrated into a substrate; and a second layer that comprises a second (meth)acrylate based binder and 2 to 5 hollow particle layers in the second (meth)acrylate based binder and that covers and contacts the first layer; wherein each of the 2 to 5 hollow particle layers comprises sequentially connected hollow particles and the layers are adjacent to each other, wherein a ratio of the cross-sectional area of the hollow particles to any cross-sectional area of the second layer is 85 to 92%, and wherein adhesion of the anti-reflective coating film evaluated by a ASTM D-3359 cross cut test using a Nichiban tape is greater than 2B and equal to or less than 5B.
2. The anti-reflective coating film according to claim 1 , further comprising one or more hollow particles apart from the 2 to 5 hollow particle layers.
3. The anti-reflective coating film according to claim 2 , wherein one or more hollow particles are apart from the 2 to 5 hollow particle layers with a distance of 150 nm or less.
4. The anti-reflective coating film according to claim 2 , wherein the number of the hollow particles apart from the 2 to 5 hollow particle layers is 10% or less of the total number of the hollow particles comprised in the film.
5. The anti-reflective coating film according to claim 1 , wherein the first (meth)acrylate-based binder comprises a crosslinked polymer of a (meth)acrylate-based compound having a molecular weight of less than 600.
6. The anti-reflective coating film according to claim 5 , wherein the first layer further comprises the region having the crosslinked copolymer of the (meth)acrylate-based compound having a molecular weight of less than 600 and the (meth)acrylate-based compound having a molecular weight of 600 to 100,000, in addition to the region having the crosslinked polymer.
7. The anti-reflective coating film according to claim 6 , wherein the region having the crosslinked copolymer is located to a depth of approximately 5 to 50% of the first layer, based on the interface between the first and second layers.
8. The anti-reflective coating film according to claim 1 , wherein the second (meth)acrylate-based binder comprises a crosslinked copolymer of a (meth)acrylate-based compound having a molecular weight of less than 600 and a (meth)acrylate-based compound having a molecular weight of 600 to 100,000.
9. The anti-reflective coating film according to claim 8 , wherein the crosslinked copolymer is comprised to exhibit an increasing distribution gradient toward the second layer.
10. The anti-reflective coating film according to claim 1 , wherein the second layer further comprises inorganic nanoparticles.
11. The anti-reflective coating film according to claim 1 , wherein the second (meth)acrylate-based binder comprises a crosslinked copolymer of a (meth)acrylate-based compound having a molecular weight of less than 600, a (meth)acrylate-based compound having a molecular weight of 600 to 100,000 and a fluorine-based (meth)acrylate compound.
12. The anti-reflective coating film according to claim 1 , wherein the inorganic nanoparticles have a number average diameter of 5 to 50 nm.
13. The anti-reflective coating film according to claim 1 , wherein the inorganic nanoparticles are silica nanoparticles.
14. The anti-reflective coating film according to claim 1 , wherein the hollow particles have a number average diameter of 5 to 80 nm.
15. The anti-reflective coating film according to claim 1 , wherein the hollow particles are hollow silica particles.