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.
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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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