Hard coat film and curable resin composition for hard coat layer

Abstract

A curable resin composition for a hard coat layer capable of forming a hard coat layer having high hardness even with thin thickness and / or excellent in abrasion resistance and hardness, and a hard coat film using the curable resin composition are provided. A hard coat film in which a hard coat layer is provided on one side of a transparent substrate film, wherein the hard coat layer comprises a matrix in a crosslinked state and an aggregate in which 3 to 100 silica fine particles having an average primary particle diameter of 1 to 100 nm are aggregated, and wherein the aggregate is cross-linked to the matrix, and an irregularly shaped silica fine particle constituted with 3 to 20 silica fine particles having an average primary particle diameter of 1 to 100 nm connected to each other by inorganic chemical bonding is contained as a part of the aggregates. The hard coat layer further contains a silica fine particle preferably.

Description

technical field [0001] The present invention relates to a hard coat film in which a hard coat layer is provided on a transparent base film and a curable resin combination for a hard coat layer for forming the hard coat layer, which are used for the purpose of protecting the surface of a display or the like thing. Background technique [0002] The image display surfaces of image display devices such as liquid crystal displays, CRT displays, projection displays, plasma displays, and electroluminescent displays are required to be provided with scratch resistance so that they will not be damaged during use. On the other hand, generally by using a hard coat film (optical laminate) provided with a hard coat (HC) layer on a base film or further provided with optical functions such as anti-reflection or anti-glare properties, the Scratch resistance of an image display surface of an image display device. [0003] Usually, a hard coat layer is formed on a base film using a photopoly...

AI Technical Summary

Problems solved by technology

However, there is a problem that when the thickness is increased, although the hardness increases, cracks (cracks) are likely to occur in the hard coat layer, or warping of the entire laminate due to curing shrinkage of the components of the hard coat layer (so-called curling), when affixing the laminate to a display, it will significantly impair the operability

In the case where inorganic fine particles are added to the hard coat layer, it is difficult to achieve a mechanical strength of 4H or more in terms of pencil hardness due to the film thickness of the hard coat layer obtained from the above-mentioned required performance of the hard coat film.

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