Optical film, method for producing same, and polymer liquid crystal particle

A technology of optical thin films and polymers, applied in chemical instruments and methods, optics, liquid crystal materials, etc.

Active Publication Date: 2007-05-30
TOMOEGAWA PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide an optical film suitable for anti-glare treatment and its production, which has a sufficient effect of preventing external light from entering while suppressing image blurring and contrast reduction. method

Method used

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  • Optical film, method for producing same, and polymer liquid crystal particle
  • Optical film, method for producing same, and polymer liquid crystal particle
  • Optical film, method for producing same, and polymer liquid crystal particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 3.0 g of a compound represented by the following formula (1) as a polymerizable monomer, 2.0 g of a compound represented by the following formula (2), and 0.02 g of 2,2'-azobisisobutyronitrile as a polymerization initiator 200 ml of a 0.10% aqueous solution of polyvinyl alcohol was mixed at 5° C. to obtain a reaction liquid of a polymerizable monomer.

[0048] The reaction solution of the above-mentioned polymerizable monomer was stirred at 5000 rpm with a homogenizer to prepare an emulsion of the polymerizable monomer. Furthermore, the emulsion was heated and polymerized at 80° C. for 5 hours while stirring at 5000 rpm with a homogenizer in a nitrogen atmosphere, and then filtered to obtain 4.3 parts of polymer liquid crystal particles. As a result of observing the shape of the obtained polymer liquid crystal particles with a scanning electron microscope, they were spherical. As a result of measuring the particle diameter by the Coulter counter method, it was 5.1 μm, ...

Embodiment 2

[0052] 3.0 g of the compound represented by the above formula (1) as a polymerizable monomer, 2.0 g of the compound represented by the above formula (2), 0.02 g of 2,2'-azobisisobutyronitrile as a polymerization initiator, It mixed in 200 ml of THF at 5 degreeC, and obtained the reaction liquid of a polymerizable monomer. Under a nitrogen atmosphere, the polymerizable monomer reaction solution was heated and polymerized at 54° C. for 24 hours while stirring with a magnetic stirrer, and then cooled and filtered to obtain 4.1 g of a white polymer liquid crystal compound. The volume average molecular weight of the polymer liquid crystal compound measured by GPC was about 80,000.

[0053] Next, 2.0 g of the above-mentioned polymer liquid crystal compound was mixed into 20 g of anisole, and heated and dissolved at 80° C. to obtain a solution. Furthermore, after cooling the obtained solution to 5 degreeC, it filtered and obtained 1.9 g of polymer liquid crystal microparticles|fine-...

Embodiment 3

[0055] 2.0 g of the polymer liquid crystal compound obtained in Example 2 was dissolved in 40 g of chloroform to obtain a solution. Next, this solution was sprayed into droplets with a particle diameter of 10 μm by a spray dryer, and dried with hot air at 100° C. to obtain 0.6 g of polymer liquid crystal particles. As a result of observing the shape of the obtained polymer liquid crystal particles with a scanning electron microscope, they were spherical. As a result of measuring the particle diameter by the Coulter counter method, it was 4.0 μm.

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Abstract

Disclosed is an optical film which hardly causes blurring of images and lowering of contrast and is suitable for an anti-glare processing. Also disclosed is a method for producing such an optical film. Specifically disclosed is an optical film comprising a transparent base and a coating layer which is formed on at least one surface of the base and composed of a transparent resin and transparent particles having an average particle size of 0.5-10 mum which are dispersed in the resin. This optical film is characterized in that either of the transparent resin and the transparent particles is composed of an optically anisotropic polymer which is a polymer liquid crystal compound with molecular orientation, while the other is composed of an optically isotropic resin.

Description

technical field [0001] The present invention relates to an optical film with scattering anisotropy suitable for image displays such as liquid crystal displays (LCDs), plasma displays (PDPs), CRTs, ELs, etc. Thin-film polymer liquid crystal particles made of a polymer material having liquid crystal mesogen. Background technique [0002] Image displays represented by the aforementioned LCDs, PDPs, CRTs, ELs, etc. (hereinafter referred to as "displays") are being used in various fields including televisions and computers, and are developing rapidly. In particular, LCDs are widely used in personal computers, mobile phones, televisions, digital cameras, PDAs, and other various devices as thin, light, and versatile displays. [0003] When these displays are used outdoors or in a bright place such as under fluorescent lighting, writing to the display becomes a problem due to the influence of external light such as sunlight or fluorescent lighting. treatment to scatter incoming am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02B32B7/02G02B1/10G02F1/1335G02B5/30G02B1/11G02B1/12
CPCG02F1/133504C09K19/544C09K19/3852G02B1/111G02B5/3016G02B1/12G02F2201/38G02B5/02G02B1/10G02F1/1335
Inventor 村田亮东健策川月喜弘
Owner TOMOEGAWA PAPER CO LTD
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