Example 2
30 g of pentaerythritol triacrylate, 2.5 g of a high molecular weight copolymer (BEAMSET 371, Arakawa Co., epoxy acrylate, molecular weight 40,000), 20 g of methyl ethyl ketone, and 0.5 g of a leveling agent (Tego Wet 270) were uniformly mixed, and then 2 g of an acryl-styrene copolymer (volume average particle diameter: 2 μm, manufacturing company: Sekisui Plastics) was added as fine particles having a refractive index of 1.525 to prepare a hard coating composition.
The obtained hard coating composition was coated on a PET film (thickness 80 μm, retardation 10,000 nm) with a #10 Mayer bar, and dried at 90° C. for 1 minute. The dried product was irradiated by UV of 150 mJ/cm2 to prepare a hard coating layer with a thickness of 5 μm.
100 parts by weight of trimethylolpropane trimethacrylate (TMPTA), 97.5 parts by weight of hollow silica nanoparticles (diameter: about 50 to 60 nm, JSC Catalysts and Chemicals), 244 parts by weight of solid-type ZrO2 particles (diameter: about 16 nm), 37.5 parts by weight of a fluorine-containing compound (RS-923, DIC Corp.), and 9.3 parts by weight of an initiator (Irgacure 127, Ciba Company) were diluted in methyl isobutyl ketone (MIBK) to a solid concentration of 3.2 wt %.
100 parts by weight of pentaerythritol triacrylate (PETA), 281 parts by weight of hollow silica nanoparticles (diameter: about 50 to 60 nm, JSC Catalysts and Chemicals), 63 parts by weight of solid-type SiO2 particles (diameter: about 12 nm), 150 parts by weight of a fluorine-containing compound (RS-923, DIC Corp.), and 31 parts by weight of an initiator (Irgacure 127, Ciba Company) were diluted in methyl isobutyl ketone (MIBK) to a solid concentration of 3 wt %.
Example 3
100 parts by weight of dipentaerythritol hexaacrylate (DPHA), 133 parts by weight of hollow silica nanoparticles (diameter: about 50 to 60 nm, JSC Catalysts and Chemicals), 433 parts by weight of solid-type TiO2 particles (diameter: about 18 nm), 51.3 parts by weight of a fluorine-containing compound (RS-923, DIC Corp.), and 11.3 parts by weight of an initiator (Irgacure 127, Ciba Company) were diluted in methyl isobutyl ketone (MIBK) to a solid concentration of 3.1 wt %.
A photocurable coating composition for forming a low refractive layer was prepared by the same method as Example 2, except that the solid-type ZrO2 particles were replaced with 110 nm solid-type ZnO2 particles, and an anti-reflective film was prepared by the same method as Example 2.