Anti-glare coating composition having improved anti-fingerprint function and anti-glare film prepared therefrom
The present invention relates to an anti-glare coating composition for preparation of anti-glare films having good anti-fingerprint properties as well as improved contrast ratio and image definition. More specifically, the coating composition comprises organic or inorganic particles, a photocurable resin, a photoinitiator, and a compound including an olefin oxide repeating unit.
1. An anti-glare composition comprising organic or inorganic particles, a photocurable resin, a photoinitiator, and an olefin oxide compound represented by the following formula 1 or 2:
(CH 2 CH 2 O) x (CH 2 CH 3 CHO) y (CH 2 CH 2 O) z [Formula 1]
R 1 —(CH 2 CH 2 O) x (CH 2 CH 3 CHO) y (CH 2 CH 2 O) z —R 2 [Formula 2]
wherein each of R 1 and R 2 is independently (meth)acrylate, alkyl(meth)acrylate having 1 to 3 carbon atoms, hydroxide, or hydrogen;
wherein each of x and z is independently an integer from 0 to 150; and y is an integer from 20 to 100.
2. The anti-glare composition as claimed in claim 1 , wherein each of x and z in the formula is independently an integer from 1 to 20.
3. The anti-glare composition as claimed in claim 1 , wherein the organic or inorganic particles have a particle diameter of 1 to 10 μm.
4. The anti-glare composition as claimed in claim 1 , wherein the organic or inorganic particles have a volume average particle diameter of 2 to 10 μm.
5. The anti-glare composition as claimed in claim 1 , wherein the organic or inorganic particles include at least one selected from an organic particle group consisting of acryl-based resin, styrene-based resin, epoxy resin, and nylon resin; and an inorganic particle group consisting of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, and zinc oxide.
6. The anti-glare composition as claimed in claim 1 , wherein the photocurable resin has the difference of refraction index from the organic or inorganic particles in the range of 0.005 to 0.1.
7. The anti-glare composition as claimed in claim 1 , wherein the photocurable resin includes at least one selected from a reactive acrylate oligomer group consisting of urethane acrylate oligomer, epoxy acrylate oligomer, polyester acrylate, and polyether acrylate; and a multifunctional acrylate monomer group consisting of dipentaerythritol hexaacrylate, dipentaerythritol hydroxy pentaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, trimethylene propyl triacrylate, propoxylated glycerol triacrylate, trimethylpropane ethoxy triacrylate, 1,6-hexanediol diacrylate, propoxylated glycero triacrylate, tripropylene glycol diacrylate, and ethylene glycol diacrylate.
8. The anti-glare composition as claimed in claim 1 , wherein the olefin oxide compound represented by the formula 1 or 2 is contained at an amount of 1 to 50 parts by weight with respect to 100 parts by weight of the photocurable resin.
9. The anti-glare composition as claimed in claim 1 , wherein the photoinitiator includes at least one selected from the group consisting of 1-hydroxy cyclohexylphenyl ketone, benzyl dimethyl ketal, hydroxydimethyl acetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether.
10. An anti-glare film comprising:
a transparent substrate layer; and
an anti-glare layer overlying the transparent substrate layer and being formed from the coating composition as claimed in claim 1 .
11. The anti-glare film as claimed in claim 10 , wherein the anti-glare film has a light transmission of at least 90% as measured on the basis of JIS-K-7105, a haze value of at least 1.0, a 60° reflection gloss of 70 to 90, an image definition of at least 250%, and a contrast ratio of at least 400 as measured on the basis of KS C IEC 61988-2-1.
12. A display device comprising the anti-glare film as claimed in claim 10 .