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US 7,569,269 B2Granted
Hard coat film, antireflection hard coat film, optical element and image display
AssigneeNitto Denko Corporation
InventorsKatsunori Takada, Daisuke Hamamoto, Takayuki Shigematsu
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Abstract
A hard coat film of the present invention comprises 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 has a high hardness and suppresses curling due to cracking and cure shrinkage.
Claims18
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.
3 more elements
Dependencies are inferred from the claim text.