Coating composition for protecting dazzling effect

1. An antiglare film comprising a substrate; and an antiglare coating composition coated on the substrate, the antiglare coating composition comprising:

a) acrylate binder resin;

b) 2 to 30 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica having an average particle size ranging from 0.4 μm to less than 1 μm, wherein the refractive index of the fine particles varies between 0.2 to 0.5 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin; and

c) 1 to 20 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica, having an average particle size of 1 to 3 μm, wherein the refractive index of the fine particles varies within 0.1 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin, and

wherein the internal diffusion haze of the film ranges from 15 to 40 and surface haze of the film is less than 15.

2. The antiglare film according to claim 1 , wherein the substrate is selected from the group consisting of triacetyl cellulose, polyester film, polymethylmethacrylate (PMMA), and polycarbonate (PC).

3. An antiglare coated sheet coated with an antiglare coating composition, the antiglare coating composition comprising:

a) acrylate binder resin;

b) 2 to 30 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica, having an average particle size ranging from 0.4 μm to less than 1 μm, wherein the refractive index of the fine particles varies between 0.2 to 0.5 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin; and

c) 1 to 20 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica, having an average particle size of 1 to 3 μm, wherein the refractive index of the fine particles varies within 0.1 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin, and

wherein the internal diffusion haze of the film ranges from 15 to 40 and surface haze of the film is less than 15.

4. The antiglare film according to claim 1 , wherein the antiglare coating composition further comprises one or more additives selected from a group consisting of a leveling agent, a wetting agent, and an antifoaming agent.

5. The antiglare film according to claim 1 , wherein the antiglare coating composition comprises:

a) acrylate binder resin comprising

i) up to 80 wt % of a reactive oligomer,

ii) 10 to 100 wt % of a multifunctional monomer, and

iii) up to 30 wt % of one or more bifunctional or monofunctional acrylate and methacrylate;

b) 2 to 30 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica, having an average particle size ranging from 0.4 μm to less than 1 μm, wherein the refractive index of the fine particles varies between 0.2 to 0.5 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin;

c) 1 to 20 wt % of inorganic fine particles selected from a group consisting of alumina, aluminum hydroxide, magnesium oxide, antimony oxide, and silica, having an average particle size of 1 to 3 μm, wherein the refractive index of the fine particles varies within 0.1 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin;

d) 0.01 to 10 wt % of an initiator, based on the weight of acrylate binder resin; and

e) 10 to 200 wt % of a solvent, based on the weight of acrylate binder resin.

6. The antiglare film according to claim 5 , wherein the reactive oligomer is one or more compounds selected from the group consisting of a urethane-modified oligomer, a polyester oligomer, and an epoxy oligomer having 2 to 6 functional groups.

7. The antiglare film according to claim 5 , wherein the multifunctional monomer is one or more compounds selected from the group consisting of dipentaerythritol hexaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, and trimethylene propyl triacrylate.

8. The antiglare film according to claim 5 , wherein the bifunctional or monofunctional acrylate or methacrylate is one or more compounds selected from the group consisting of ethyl acrylate, butyl acrylate, isobornyl acrylate, octadecyl acrylate, 2-hydroxyethyl acrylate, methyl methacrylate, butyl methacrylate, hexanediol diacrylate, dipropylene glycol diacrylate, triethylene glycol diacrylate, tripropylene glycol diacrylate, and methacrylate.

9. The antiglare film according to claim 5 , wherein the initiator is one or more compounds selected from the group consisting of benzoylperoxide, 1-hydroxy cyclohexylphenyl ketone, benzyl dimethyl ketal, hydroxydimethylacetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether.

10. The antiglare film according to claim 5 , wherein the solvent is one or more compounds selected from the group consisting of methanol, ethanol, isopropanol, methyl acetate, ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, acetone, methyl cellosolve, ethyl cellosolve, butyl cellosolve, dimethyl formamide, and tetrahydrofuran.

11. The antiglare film according to claim 1 , wherein the b) inorganic fine particles have an average particle size of 0.4 to 0.6 μm.

12. The antiglare film according to claim 5 , which has an average surface roughness (Ra) of 0.1 to 0.3 μm.