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Hard-coat optical film, polarizing plate and image display device

A technology of hard coating and optical film, which can be used in coatings, optics, optical components, etc., and can solve the problems of high water absorption and high birefringence.

Active Publication Date: 2021-09-14
BENQ MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although TAC film has good light transmission, it has the disadvantages of high water absorption and high birefringence. Therefore, when the hard coat film based on TAC film is used in car navigation systems, handheld mobile devices, etc. Display devices with high temperature and humidity requirements will face greater challenges

Method used

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  • Hard-coat optical film, polarizing plate and image display device
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  • Hard-coat optical film, polarizing plate and image display device

Examples

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preparation example Construction

[0057] The preparation method of the hard coat optical film of the present invention comprises the addition of polyurethane (meth)acrylate oligomers with functionalities ranging from 6 to 15 in the (meth)acrylate composition, at least one functionality not less than 3 ( Meth)acrylate monomers, at least one (meth)acrylate monomers with a functionality of less than 3, and initiators are mixed evenly with appropriate solvents to form a hard coat solution, and leveling can be added to the hard coat solution as required agent; the hard coat solution is coated on the PMMA substrate, dried to remove the solvent, and then cured by radiation or electron beams to form a hard coat on the PMMA substrate to obtain a hard coat optical film.

[0058] A low-refractive-index layer can be further formed on the aforementioned hard coat layer of the present invention, and the low-refractive-index layer is made of binder resin, hollow silicon dioxide nanoparticles, initiator, and containing the afo...

Embodiment 1

[0066] Embodiment 1: Preparation of hard coat optical film

[0067]39 parts by weight of urethane acrylate oligomer (functionality 6, molecular weight about 1,520, viscosity about 25,000 cps (25°C), purchased from Miwon, Korea), 4.5 parts by weight of pentaerythritol triacrylate (PETA), 12 parts by weight Parts of dipentaerythritol hexaacrylate (DPHA), 6 parts by weight of hexanediol diacrylate (HDDA), 4 parts by weight of photoinitiator (Chemcure-184, purchased from Hengqiao Industry, Taiwan, China), 24.5 parts Parts by weight of ethyl acetate (EAC) and 75 parts by weight of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a hard coating solution. Then the aforementioned hard coat solution is coated onto a 40 micron PMMA substrate, and then the substrate coated with the hard coat solution is dried in an oven at 90° C. for 30 seconds, and then dried at 40 mJ / cm under a nitrogen atmosphere. 2 Radiation doses of UV lamps for photocuring. In this way, a hard coa...

Embodiment 2

[0068] Embodiment 2: Preparation of hard coat optical film

[0069] 39 parts by weight of urethane acrylate oligomer (functionality 15, molecular weight about 3,600, viscosity about 4,700 cps (60°C), purchased from Chemton, Korea), 4.5 parts by weight of pentaerythritol triacrylate (PETA), 12 parts by weight Parts of dipentaerythritol hexaacrylate (DPHA), 6 parts by weight of hexanediol diacrylate (HDDA), 4 parts by weight of photoinitiator (Chemcure-184, purchased from Hengqiao Industry, Taiwan, China), 24.5 parts Parts by weight of ethyl acetate (EAC) and 75 parts by weight of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a hard coating solution. Then the aforementioned hard coat solution is coated onto a PMMA substrate of 40 microns, and then the PMMA substrate coated with the hard coat solution is dried in an oven at 90° C. for 30 seconds, and then dried at a rate of 40 mJ / cm under a nitrogen atmosphere. 2 Radiation doses of UV lamps for photocuring. I...

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Abstract

The invention provides a hard coat optical film, a polarizing plate and an image display device. The hard coat comprises a (meth)acrylate composition and an initiator, wherein the (meth)acrylate composition comprises: a functionality of 6 Urethane (meth)acrylate oligomers between 1 and 15, (meth)acrylate monomers with at least one functionality of 3 to 6, and at least one acrylic (meth)acrylate monomer with a functionality of less than 3 , wherein the molecular weight of the urethane acrylate oligomer is between 1,000 and 4,500. The hard coat layer of the hard coat optical film can be coated with other functional coatings, such as a low-refractive index layer solution, to form a hard coat optical film with anti-reflection properties. The hard coat layer of this hard coat optical film can optionally add microparticles to form a hard coat optical film with anti-glare properties. It can also be further coated with other functional coatings, such as low refractive index solutions, to form both Hard coat film with anti-reflection and anti-glare properties.

Description

technical field [0001] The present invention relates to a kind of hard coating optical film that can be used for image display device, especially a kind of hard coating optical film with good scratch resistance, and polarizer with this hard coating optical film and containing this hard coating An image display device with a layer of optical film and / or polarizing plate. Background technique [0002] For the current 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 The surface of the screen may be worn due to contact, which not only affects the image quality, but also degrades the appearance of the display. [0003] In the prior art, an optical film with a hard coat layer has been used to protect the surface of an image display device. The optical film with a hard coat layer is generally formed by coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/046C09D175/14C09D7/61G02B1/14G02B5/30C08L33/12
CPCC08J2333/12C08J2475/14C09D175/14C09D7/61C09D7/70C08J7/0427G02B5/305G02B1/14C08K7/26
Inventor 陈庆煌王孜齐游国轩范纲伦
Owner BENQ MATERIALS
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