Hard coating film, antireflective hard coating film, optical element and image display device

Abstract

A hard coating film having a hard coating layer of a cured coating film layer on at least one surface of a transparent plastic film base material, wherein a material forming the hard coating layer comprises a urethane acrylate (A), an isocyanurate having an acrylate moiety (B) and inorganic ultra-fine particles (C). The above hard coating film has a high hardness and also can inhibit cracking and the curling due to the shrinkage caused by curing.

Description

technical field

[0001] The present invention relates to a hard-coated film and an anti-reflection hard-coated film in which at least one surface of a transparent plastic film substrate is provided with a hard coat layer. Furthermore, the present invention relates to optical elements such as polarizers using the hard-coat film and the hard-coat antireflection film. The hard coat film, antireflection hard coat film, and optical element of the present invention can be suitably used in image display devices, especially CRT, liquid crystal display (LCD), plasma display (PDP), EL display (ELD) and the like. Background technique

[0002] As one of various image display devices, there is LCD, but along with technological innovations related to LCD's high viewing angle, high definition, high-speed response, color reproducibility, etc., the application of LCD is also changing from notebook type to PC or monitor changes to TV. The basic structure of an LCD is to set a gap at a certai...

Examples

Embodiment 1

[0143] (transparent plastic film substrate)

[0144] A triacetylcellulose film (refractive index: 1.48) with a thickness of 80 μm was used.

[0145] (hard coat forming material)

[0146] A hard coat forming material (solution) was prepared by diluting the following composition with a mixed solvent of butyl acetate and methyl ethyl ketone (1 / 2: weight ratio) so that the solid content concentration was 45%, Among them, the diluted substances are: 100 parts of urethane acrylate obtained from pentaerythritol-based acrylate and hydrogenated xylene diisocyanate as urethane acrylate (A); 20 parts of cyanic acid-tris[2(acryloyloxy)ethyl]; the average particle diameter of the inorganic ultrafine particles (C) is 10-20nm ultrafine silicon oxide and 40% relative to the total solid content; polymerization initiation The content of the solvent (Irgacure 184, manufactured by Chiba Specialty Chemicals) was 3% based on the total solid content.

[0147] (Manufacture of hard coat film)

[0...

Embodiment 2

[0150] (hard coat forming material)

[0151] In Example 1, when preparing the hard coat forming material, the usage-amount of isocyanuric acid acrylate (B) was changed to 10 parts, and further 8 parts by weight of pentaerythritol tetraacrylate were added, in addition, In the same manner as in Example 1, a hard coat layer forming material was prepared.

[0152] (Manufacture of hard coat film)

[0153] In Example 1, except having used the above-mentioned hard-coat layer formation material, and having changed the thickness of a hard-coat layer into 18 micrometers, it carried out similarly to Example 1, and obtained the hard-coat film.

Embodiment 3

[0155] (transparent plastic film substrate)

[0156] A 75 μm thick triacetylcellulose film (refractive index: 1.65) was used.

[0157] (hard coat forming material)

[0158] In Example 1, when preparing the hard coat forming material, adding ultrafine particles of titanium oxide with an average particle diameter of 10 to 20 nm as inorganic ultrafine particles (C) to make it 36% relative to the total resin component, in addition, In the same manner as in Example 1, a hard coat layer forming material was prepared.

[0159] (Manufacture of hard coat film)

[0160] In Example 1, a hard coat film was obtained in the same manner as in Example 1 except that the above-mentioned transparent plastic film substrate and hard coat layer forming material were used, and the thickness of the hard coat layer was changed to 21 μm.

technical field

[0001] The present invention relates to a hard-coated film and an anti-reflection hard-coated film in which at least one surface of a transparent plastic film substrate is provided with a hard coat layer. Furthermore, the present invention relates to optical elements such as polarizers using the hard-coat film and the hard-coat antireflection film. The hard coat film, antireflection hard coat film, and optical element of the present invention can be suitably used in image display devices, especially CRT, liquid crystal display (LCD), plasma display (PDP), EL display (ELD) and the like. Background technique

[0002] As one of various image display devices, there is LCD, but along with technological innovations related to LCD's high viewing angle, high definition, high-speed response, color reproducibility, etc., the application of LCD is also changing from notebook type to PC or monitor changes to TV. The basic structure of an LCD is to set a gap at a certai...

Examples

Embodiment 1

[0143] (transparent plastic film substrate)

[0144] A triacetylcellulose film (refractive index: 1.48) with a thickness of 80 μm was used.

[0145] (hard coat forming material)

[0146] A hard coat forming material (solution) was prepared by diluting the following composition with a mixed solvent of butyl acetate and methyl ethyl ketone (1 / 2: weight ratio) so that the solid content concentration was 45%, Among them, the diluted substances are: 100 parts of urethane acrylate obtained from pentaerythritol-based acrylate and hydrogenated xylene diisocyanate as urethane acrylate (A); 20 parts of cyanic acid-tris[2(acryloyloxy)ethyl]; the average particle diameter of the inorganic ultrafine particles (C) is 10-20nm ultrafine silicon oxide and 40% relative to the total solid content; polymerization initiation The content of the solvent (Irgacure 184, manufactured by Chiba Specialty Chemicals) was 3% based on the total solid content.

[0147] (Manufacture of hard coat film)

[0...

Embodiment 2

[0150] (hard coat forming material)

[0151] In Example 1, when preparing the hard coat forming material, the usage-amount of isocyanuric acid acrylate (B) was changed to 10 parts, and further 8 parts by weight of pentaerythritol tetraacrylate were added, in addition, In the same manner as in Example 1, a hard coat layer forming material was prepared.

[0152] (Manufacture of hard coat film)

[0153] In Example 1, except having used the above-mentioned hard-coat layer formation material, and having changed the thickness of a hard-coat layer into 18 micrometers, it carried out similarly to Example 1, and obtained the hard-coat film.

Embodiment 3

[0155] (transparent plastic film substrate)

[0156] A 75 μm thick triacetylcellulose film (refractive index: 1.65) was used.

[0157] (hard coat forming material)

[0158] In Example 1, when preparing the hard coat forming material, adding ultrafine particles of titanium oxide with an average particle diameter of 10 to 20 nm as inorganic ultrafine particles (C) to make it 36% relative to the total resin component, in addition, In the same manner as in Example 1, a hard coat layer forming material was prepared.

[0159] (Manufacture of hard coat film)

[0160] In Example 1, a hard coat film was obtained in the same manner as in Example 1 except that the above-mentioned transparent plastic film substrate and hard coat layer forming material were used, and the thickness of the hard coat layer was changed to 21 μm.

Images