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Anti-reflection film and polarizing plate having same

A technology of anti-reflection film and low refractive index layer, which is applied in the field of polarizing plates, can solve problems such as low peeling force, uneven film surface, white fog, etc., and achieve increased crosslinking density, small water contact angle, and good scratch resistance sexual effect

Active Publication Date: 2020-07-03
BENQ MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluorine-containing low-refractive index resins such as polyurethane oligomers or fluorinated polyurethane oligomers with fluorine-containing polyether functional groups in the main chain not only have poor compatibility, but may easily cause unevenness or unevenness on the surface of the antireflection film. Problems affecting the optical effect such as white fog on the surface, and because the aforementioned fluorine-containing low-refractive index resin is relatively soft, the scratch resistance of the anti-reflection film will be insufficient
In addition, because the above-mentioned fluorine-containing resin is relatively hydrophobic, the peeling force between the anti-reflection film and the subsequent protective film will be low, which will affect the processability of subsequent products.
The addition of more hollow nanoparticles is also likely to affect the scratch resistance of the anti-reflection film due to the decrease in resin content.

Method used

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  • Anti-reflection film and polarizing plate having same
  • Anti-reflection film and polarizing plate having same
  • Anti-reflection film and polarizing plate having same

Examples

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preparation example Construction

[0060] The preparation method of the anti-reflection film of the present invention comprises mixing polyurethane (meth)acrylate oligomer, initiator and appropriate solvent to form a hard coat solution, and the hard coat solution can be added (methyl) Acrylate monomer, organic microparticles, silica nanoparticles, or leveling agent; then apply the hard coat solution on the substrate, dry to remove the solvent, and then cure by radiation or electron beam to form on the substrate Form a hard coat layer; then the polysiloxane resin modified by fluorine and acrylate, hollow silicon dioxide nanoparticles, initiator, (meth)acryl modified with the aforementioned perfluoropolyether functional group The leveling agent of the organic silicon compound and the appropriate solvent are mixed uniformly to form a low refractive index layer solution. The low refractive index layer solution can be added with fluorinated polyurethane oligomers with 2 to 6 functionalities as required; the low refra...

preparation example 1

[0067] Preparation Example 1: Preparation of Antiglare Hard Coating Film

[0068] 405 parts by weight of urethane acrylate oligomer (functionality 9, molecular weight about 2,000, viscosity at 25°C is about 86,000 cps, purchased from Allnex, USA), 45 parts by weight of pentaerythritol triacrylate (PETA), 105 parts by weight Parts of dipentaerythritol hexaacrylate (DPHA), 45 parts by weight of hexanediol diacrylate (HDDA), 15 parts by weight of 2-phenoxyethyl acrylate (PHEA), 35 parts by weight of photoinitiator (Chemcure-481, purchased from Hengqiao Industry, Taiwan), 5 parts by weight of photoinitiator (TR-PPI-ONE, purchased from Qiangli New Materials, Hong Kong), 245 parts by weight of ethyl acetate (EAC) and 100 Parts by weight of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a hard coating solution.

[0069] Then, 300 parts by weight of the aforementioned hard coat solution, 10.8 parts by weight of reactive silica nanoparticle dispersion sol (MEK-AC-413...

preparation example 2

[0070] Preparation Example 2: Preparation of Antiglare Hard Coating Film

[0071] 390 parts by weight of urethane acrylate oligomer (functionality 9, molecular weight about 2,000, viscosity at 25°C about 86,000 cps, purchased from Allnex, USA), 45 parts by weight of pentaerythritol triacrylate (PETA), 120 parts by weight Dipentaerythritol hexaacrylate (DPHA), 60 parts by weight of 2-phenoxyethyl acrylate (PHEA), 40 parts by weight of photoinitiator (Chemcure-481, purchased from Hengqiao Industry, Taiwan), 245 Parts by weight of ethyl acetate (EAC) and 100 parts by weight of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a hard coating solution.

[0072] Then, with 300 parts by weight of the aforementioned hard coating solution, 5.44 parts by weight of reactive silica nanoparticle dispersion sol (MEK-5630X, solid content is 30%, solvent is methyl ethyl ketone, purchased from Guolian Silicon Industry, Taiwan) , 2.01 parts by weight of hydrophobically modified ...

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Abstract

The invention provides an anti-reflection film and a polarizing plate having the same. The anti-reflection film includes a substrate, a hard coating layer on the substrate, and a low refractive indexlayer on the hard coating layer, wherein the low refractive index layer includes polysiloxane resin modified with fluorine and acrylate, a plurality of hollow silica nanoparticles, an initiator, and leveling agent including a (meth) acryloyl-modified organosilicon compound having a perfluoropolyether functional group, so good processability can be provided, reflectivity of the anti-reflection filmis smaller than 1.1%, and a water contact angle ranges from 90 degrees to 125 degrees. The anti-reflection film is advantaged in that the anti-reflection film is arranged on a surface of a polarizingelement, the crosslinking density of the low-refractive-index layer of the anti-reflection film is improved, and the anti-reflection film has good scratch resistance and low reflectivity, after the low-refractive-index layer is dried and formed, a problem that the optical property is influenced by uneven film surfaces or white fog can be avoided, so the quality of the anti-reflection film and thepolarizing plate with the anti-reflection film is improved.

Description

technical field [0001] The present invention relates to an anti-reflection film that can be used in image display devices, especially an anti-reflection film with low water contact angle, suitable scratch resistance and low reflectivity, and an anti-reflection film comprising the anti-reflection film polarizer. Background technique [0002] At present, cathode ray tube display (CRT), liquid crystal display (LCD), plasma display (PDP), electroluminescent display (ELD), field emission display (FED), organic light emitting diode display (OLED) and other image display devices All image displays have the requirement of reducing the reflection of the light irradiated from the external light source and improving the image quality thereof. In response to this requirement, an anti-reflection film with an anti-reflection layer can be formed on a light-transmitting substrate, thereby reducing the reflection of the image display surface of the image display device and improving image d...

Claims

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Application Information

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IPC IPC(8): G02B1/14G02B1/111G02B5/30C08J7/04C09D183/06C09D7/61C09D175/14C08L33/12
CPCG02B1/14G02B1/111G02B5/30C09D183/06C09D7/61C09D175/14C09D7/70C08J2333/12C08J2483/06C08J2475/14C08K2201/011C08K7/26C08K3/36
Inventor 陈庆煌游国轩
Owner BENQ MATERIALS
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