Anti-reflective film, polarizer comprising the same, and image display comprising the anti-reflective film and/or the polarizer comprising the same

Abstract

The invention is to provide an anti-reflective film. The anti-reflective film comprises a substrate, a hard coating layer disposed on the substrate and a low refractive layer disposed on the hard coating layer. The low refractive layer comprises a (meth)acrylate resin, hollow silica nanoparticles, an initiator and a leveling agent. Wherein the leveling agent comprises a (meth)acrylic-modified organosilicone compound having a perfluoropolyether group. The reflectivity of the anti-reflective film of the present invention is in the range of 1.2% to 1.4%.

What is claimed is: 
     
         1 . An anti-reflective film comprising:
 a substrate;   a cured hard coating layer coated on the substrate; and   a low refractive layer on the hard coating layer,   wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and   wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.   
     
     
         2 . The anti-reflective film as claimed in  claim 1 , wherein the perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound comprises compounds represented by the following formula (I) and represented by the following formula (II): 
       
         
           
           
               
               
           
         
         wherein b′ 1 +b′ 2  is ranging between 2 and 6.5, and Rf 12  is the group represented by the following formula: 
       
       
         
           
           
               
               
           
         
         wherein n1 is ranging between 2 and 100. 
       
     
     
         3 . The anti-reflective film as claimed in  claim 2 , wherein the number average molecular weight (Mn) of the perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound is ranging between 1,500 and 16,000. 
     
     
         4 . The anti-reflective film as claimed in  claim 1 , wherein the amount of the leveling agent used in low refractive layer is ranging from 5 weight parts to 20 weight parts relative to per 100 weight parts of (meth)acrylate resin. 
     
     
         5 . The anti-reflective film as claimed in  claim 1 , wherein the (meth)acrylate resin is selected from at least one of the group consisting of pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth) acrylate, pentaerythritol tetra(meth) acrylate, dipentaerythritol penta(meth)acrylate, trimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate and dipentaerythritol tetra(meth)acrylate, or combinations thereof. 
     
     
         6 . The anti-reflective film as claimed in  claim 1 , wherein the particle diameter of the hollow silica nanoparticles used in the low refractive layer is from 50 nm to 100 nm. 
     
     
         7 . The anti-reflective film as claimed in  claim 1 , wherein the amount of the hollow silica nanoparticles used in the low refractive layer is ranging from 60 weight parts to 130 weight parts relative to per 100 weight parts of (meth)acrylate resin. 
     
     
         8 . The anti-reflective film as claimed in  claim 1 , wherein the amount of the initiator used in the low refractive layer is ranging from 1.5 weight parts to 20 weight parts relative to per 100 weight parts of (meth)acrylate resin. 
     
     
         9 . The anti-reflective film as claimed in  claim 1 , wherein the initiator is selected from at least one of the group consisting of hydroxycyclohexyl phenyl ketone, diphenyl(2,4,6-trimethylbenzyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl propanone] and 2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropanoyl)phenoxy]phenyl]-2-methylpropan-1-one, or combinations thereof. 
     
     
         10 . The anti-reflective film as claimed in  claim 1 , wherein the cured hard coating layer is formed by curing a curable composition comprising a urethane(meth)acrylate oligomer and an initiator. 
     
     
         11 . The anti-reflective film as claimed in  claim 10 , wherein the number molecular weight of the urethane(meth)acrylate oligomer is greater than 1,800. 
     
     
         12 . The anti-reflective film as claimed in  claim 10 , wherein the viscosity of the urethane(meth)acrylate oligomer at 25° C. is greater than 45,000 cps. 
     
     
         13 . A polarizer comprising a polarizing element, wherein the polarizer comprises an anti-reflective film formed thereon, and the anti-reflective film comprises:
 a substrate;   a cured hard coating layer coated on the substrate; and   a low refractive layer on the hard coating layer,   wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and   wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.   
     
     
         14 . A display comprising an anti-reflective film, wherein the anti-reflective film comprises:
 a substrate;   a cured hard coating layer coated on the substrate; and   a low refractive layer on the hard coating layer,   wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and   wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.