Anti-fogging article and method for producing same

Abstract

An anti-fogging article having a substrate and an anti-fogging film on at least part of the surface of the substrate, wherein the anti-fogging film comprises a resin underlayer and a water-absorptive resin layer laminated in order on the substrate surface, the water-absorptive resin layer is composed mainly of a first cured epoxy resin obtained by reacting a water-absorptive resin layer-forming composition containing a first polyepoxide component consisting of a low molecular weight polyepoxide having molecular weight of from 200 to 800 and a high molecular weight polyepoxide having molecular weight of from 900 to 2,000 combined in mass ratio of from 30:70 to 70:30, and a first curing agent, and the resin underlayer is composed mainly of a second cured epoxy resin obtained by reacting a resin underlayer-forming composition containing a second polyepoxide component and a second curing agent, and has water absorption property lower than the water-absorptive resin layer.

Description

technical field [0001] The present invention relates to an anti-fogging article and a method for producing the same. Background technique [0002] When the surface of transparent substrates such as glass and plastic is below the dew point temperature, fine water droplets adhere to the surface and scatter the transmitted light, so that the transparency is impaired and a so-called "fogging" state occurs. As a method for preventing fogging, various proposals have been made so far. [0003] Specifically, there are known: (1) methods of treating the substrate surface with a surfactant to reduce the surface tension of attached water droplets; (2) imparting a hydrophilic group to the substrate surface with a hydrophilic resin or a hydrophilic inorganic compound; (3) A method in which a heater is installed to heat the substrate to maintain the surface of the substrate above the dew point temperature; (4) A water-absorbent resin layer is provided on the surface of the substrate to a...

AI Technical Summary

Problems solved by technology

[0006] However, although the water-absorbent cross-linked resin layer in the anti-fog article described in Patent Document 1 is excellent in anti-fog properties, it has problems in terms of durability such as abrasion resistance and peeling resistance.

The anti-fog film described in Patent Document 2 has excellent anti-fog properties and has improved durability to a certain extent. However, if the durability is improved, the appearance will be impaired, which is a problem.

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