Coating material, preparation of optical film, optical film, polarizing plate and image display device

A manufacturing method and technology for optical films, applied in the field of coating coatings, can solve problems such as poor curing of UV-curable resins and inability to obtain film hardness, etc.

Inactive Publication Date: 2007-02-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, since the UV curable resin is used, if the coating film is to be thinned, it will be hindered by oxygen, resulting in poor curing of the UV curable resin, and sufficient film hardness cannot be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Heat-curable resin (tetraalkoxysilane: 100 parts by weight) and inorganic filler (AOT ultrafine particles: 900 parts by weight) were dispersed in a mixed solvent (33 parts by weight of cyclohexanone, 38 parts by weight of ethanol, 8 parts by weight of methanol , 4% by weight MEK, and 17% by weight of PGM), a coating material for forming a coating layer with a solid content concentration of 1.29% by weight was prepared. As the ultrafine particles, those having a particle diameter of 10 to 60 nm are used.

[0065] The above coating was applied to the surface of an unsaponified TAC film having a thickness of 80 μm by a wire bar (trade name: Wire Bar #10 SA-203; manufactured by Bar Coater Tester Sangyo Co., Ltd.) to form a coating film. Air-dry the above-mentioned coating film for 30 seconds, and then further dry the above-mentioned coating film for 2 minutes under the condition of 130° C. to heat-cure the thermosetting resin, and form a coating with a film thickness of 80-...

Embodiment 2

[0068] In addition to setting the solid content concentration in the coating material for coating formation to 1.35% by weight, cyclohexanone in the mixed solvent to 30% by weight, ethanol to 39% by weight, and methanol to 9% by weight , MEK was set to 4% by weight, and PGM was set to 17% by weight, an optical film for antireflection was produced by the same method as in Example 1.

Embodiment 3

[0070] An optical film for antireflection was produced in the same manner as in Example 1 except that the solid content concentration in the coating material for coating layer formation was set to 1.67% by weight.

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PUM

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Abstract

The present invention provides a coating material for forming a coating layer that can achieve excellent adhesion to a transparent film. The coating material is prepared so that it contains a thermosetting resin, an inorganic filler, and a mixed solvent containing cyclohexanone. The content of the thermosetting resin is in the range from 5 to 20 wt % with respect to the total amount of the thermosetting resin and the inorganic filler, and the content of the cyclohexanone is in the range from 25 to 35 wt % with respect to the entire mixed solvent. By coating a surface of a transparent film with this coating material and then heat-treating the resultant coating, a coating layer with excellent adhesion can be formed on transparent film. The thus-obtained laminate of the transparent film and the coating layer can be used as an antireflection film.

Description

technical field [0001] The present invention relates to a paint for coating, a method for producing an optical film using the paint, an optical film, a polarizing plate, and an image display device. Background technique [0002] In various image display devices represented by liquid crystal display devices, organic electroluminescent (EL) display devices, and plasma display devices (PD), optical products such as sunglasses or goggles, various optical films are generally used as needed. Moreover, even in the above-mentioned optical system products, image display devices, especially monitors for car navigation or monitors for cameras, etc., which are frequently used outdoors under bright lighting conditions, are not visible due to the surface reflection of the monitor. Therefore, anti-reflection treatment is usually performed on the surface of the monitor by providing an anti-reflection film that scatters or diffuses light. [0003] The above-mentioned anti-reflection film ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04B05D7/04B05D7/24G02B1/10G02B5/30G02F1/1335B32B27/00C09D183/02C09D201/00G02B1/11
CPCG02B1/111C09D183/04G02F1/133502G02F2201/38G02B1/105G02B5/3033Y10T428/24942G02B1/18G02B1/16G02B1/14C08L2666/54C09D183/00
Inventor 高田胜则山冈尚志山田敦
Owner NITTO DENKO CORP
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