Photocatalyst hard coat film

Abstract

There is disclosed a photocatalyst hard coat film which comprises a substrate, a primer layer, a hard coat layer and a photocatalyst layer, the three layers being laminated in turn with either surface of the substrate, wherein the primer layer has a thickness of 3.0 to 20.0 μm and a linear expansion coefficient of 3.0×10−3 to 7.9×10−3 (K−1) when the temperature thereof is raised to 100° C. from 80° C., and the hard coat layer comprises a cured silane compound and 20 to 70 parts by mass of metal oxide particulates based on 100 parts by mass of the silane compound and has a thickness of 1.2 to 1.9 μm. The photocatalyst hard coat film manifests a photocatalytic function within several days from exposure to outdoors, and is excellent in weather resistance, namely, free from cracking, whitening and peeling off over a long period of time, and is well suited for pasting on outside surface of window glass and a plastic board for windows regarding high story building and for pasting on show windows.

Dependencies are inferred from the claim text.