| US 7,569,269 B2 | ||
| Hard coat film, antireflection hard coat film, optical element and image display | ||
| Katsunori Takada, Ibaraki (Japan); Daisuke Hamamoto, Ibaraki (Japan); and Takayuki Shigematsu, Ibaraki (Japan) | ||
| Assigned to Nitto Denko Corporation, Osaka (Japan) | ||
| Appl. No. 10/588,548 PCT Filed Sep. 26, 2005, PCT No. PCT/JP2005/017601 § 371(c)(1), (2), (4) Date Aug. 07, 2006, PCT Pub. No. WO2006/038481, PCT Pub. Date Apr. 13, 2006. |
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| Claims priority of application No. 2004-293935 (JP), filed on Oct. 06, 2004. | ||
| Prior Publication US 2007/0178297 A1, Aug. 02, 2007 | ||
| Int. Cl. B32B 27/32 (2006.01); B32B 5/16 (2006.01); B32B 27/40 (2006.01); G02B 27/00 (2006.01) | ||
| U.S. Cl. 428—323 [428/220; 428/328; 428/329; 428/331; 428/332; 428/423.1; 359/601] | 18 Claims |
| 1. A hard coat film comprising a hard coat layer, which is a cured coat layer, provided on at least one side of a transparent
plastic film substrate, wherein
a hard coat layer forming material comprises: urethane acrylate (A); isocyanuric acid acrylate (B) and inorganic ultrafine
particles (C), and
a mixing quantity of the isocyanuric acid acrylate (B) is about in the range of from 5 to 25 parts by weight relative to 100
parts by weight of the urethane acrylate (A),
a mixing quantity of the inorganic ultrafine particles (C) is about in the range of from 10 to 60 parts by weight relative
to all resin components in a hard coat forming material, and
a difference in refractive index between the transparent plastic film substrate and the hard coat layer is 0.04 or less.
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