Optical layered body, polarizer and image display device
AssigneeDai Nippon Printing Co., Ltd.
InventorsToshio Yoshihara, Tomoyuki Horio, Mayu Youki
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Abstract
The present invention provides an optical layered body having excellent antistatic properties, optical characteristics, hardness, adhesion, and interference fringe prevention performance, which can be produced at a low cost. An optical layered body having a hard coat layer provided on a triacetylcellulose substrate, wherein a resin composition used for forming the hard coat layer contains a quaternary ammonium salt-containing polymer, a binder resin, and a solvent; the quaternary ammonium salt-containing polymer has a higher hydrophilicity than the binder resin; and the binder resin contains two or more resin components having different hydrophilicities.
Claims9
A method for localizing a quaternary ammonium salt-containing polymer in a hard coat layer provided on a triacetylcelulose substrate of an optical layered body, which method comprises:
- applying a resin composition to the triacetylcelulose substrate for forming the hard coat layer, the resin composition containing a quaternary ammonium salt-containing polymer, a binder resin, and a solvent, wherein the solvent is a mixed solvent containing two or more solvents having different hydrophilicities and wherein less than 50% by mass of the mixed solvent is a hydrophilic solvent,
- selecting the quaternary ammonium salt-containing polymer to have a higher hydrophilicity than the binder resin, and
- selecting the binder resin to contain two or more resin components having different hydrophilicities,
- wherein the quaternary ammonium salt-containing polymer is localized in an upper part of the formed hard coat layer.
Dependencies are inferred from the claim text.