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Transmittance-increasing anti-haze coating material for optical BOPET film and preparation method thereof

An anti-fog coating and optical technology, applied in the direction of coating, etc., can solve the problems of adverse effects on the optical properties of thin films, hinder the development of optical films, etc., and achieve the effect of high adhesion

Active Publication Date: 2016-08-31
ANHUI MINGXUN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional BOPET production process, it is necessary to add a micron-sized anti-blocking agent to prevent the film from sticking after winding, but at the same time, the micron-sized anti-blocking agent will have an adverse effect on the optical properties of the film, which seriously hinders The development of my country's optical film industry

Method used

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  • Transmittance-increasing anti-haze coating material for optical BOPET film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 3.00kg SiO 2 The nanoparticles are dispersed in water to form a silica dispersion with a concentration of 5 wt%. Add 0.05kg of silane coupling agent KH-570 to the silica dispersion system, start stirring at 70°C, and react for 30 minutes.

[0029] Under stirring, a mixture of 3.70 kg acrylic acid, 1.89 kg methacrylic acid, 0.58 kg ethylene glycol dimethacrylate, 0.58 kg trimethylolpropane triacrylate and 0.58 kg pentaerythritol tetraacrylate was added dropwise to the above system. At the same time, add dropwise an aqueous solution of 0.06 kg potassium persulfate dissolved in the solution, and control the dropping time at 1.5h.

[0030] After the dripping is completed, continue to stir, heat, keep warm (70±2°C) in a sealed reaction device and react for 8 hours, and cool the material to obtain the anti-reflection and anti-fog coating solution.

[0031] Dilute the coating solution to a solution with a concentration of 10 wt% with a diluent with a volume ratio of alcohol to...

Embodiment 2

[0034] The monomer ratio was changed, 2.64 kg of acrylic acid and 3.15 kg of methacrylic acid were added, except that other raw materials and reaction conditions were the same as in Example 1. An optical BOPET film with anti-reflection and anti-fog effect is obtained.

Embodiment 3

[0036] The monomer ratio was changed, 1.59 kg of acrylic acid and 4.41 kg of methacrylic acid were added, except that other raw materials and reaction conditions were the same as in Example 1, to obtain an optical BOPET film with antireflection and antifogging effects.

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Abstract

The invention discloses a transmittance-increasing anti-haze coating material for an optical BOPET film. The coating material is prepared from reaction monomers, inorganic nanoparticles, a silane coupling agent and an initiating agent, wherein the reaction monomers are composed of acrylic acid, methacrylic acid, ethylene glycol dimethacrylate, trimethylolpropane triacrylate and pentaerythritol tetraacrylate. The total light transmittance of the optical BOPET film coated with the coating material is larger than or equal to 96%, and the haze of the optical BOPET film is smaller than or equal to 1%; compared with a BOPET base film, the light transmittance is increased by nearly 7%, and the haze is slightly decreased; no VOC is emitted in the coating drying process, and thus environmental friendliness is achieved; meanwhile, a coating has large adhesive force to the BOPET base film.

Description

Technical field [0001] The invention relates to the field of polymer coating materials, more specifically, an anti-reflection and anti-fog coating material for optical BOPET films, and a preparation method thereof. Background technique [0002] Biaxially oriented polyester film, BOPET film, is not only widely used in packaging, printing, window film and other fields because of its excellent insulation, mechanical properties, heat resistance and certain light transmittance. It is also used as an optical film in the field of liquid crystal displays. [0003] Optical films require not only the above properties, but also very high light transmittance and low haze. [0004] In the traditional BOPET production process, it is necessary to add a micron-level opening agent to prevent the film from sticking after winding. At the same time, the micron-level opening agent will adversely affect the optical properties of the film, which seriously hinders my country's development in the optical fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/02C09D7/12C08J7/04C08F220/06C08F222/14C08L67/02
CPCC08F220/06C08J7/0427C08J2367/02C08J2433/02C08K3/36C08K9/06C08K2201/011C09D7/61C09D133/02C08F222/102C08F222/103C08F222/104
Inventor 白杨白永平孟令辉李卫东席丹殷晓芬
Owner ANHUI MINGXUN NEW MATERIAL TECH
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