Non-fogging article and process for the production thereof
First Claim
1. An anti-fogging article being a film consisting essentially of(1) metal oxide fine particles having a grain size from 4 to 300 nm of 5 to 80% by weight,(2) negative-ionized surface-active agent of 0 to 15% by weight, and(3) a balance of metal oxides coated on a substrate,said film surface having dents and projections having an arithmetical mean average (Ra) from 1.5 to 80 nm and a mean interval (Sm) of dents and projections from 4 to 300 nm formed on said film surface.
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Accused Products
Abstract
The present invention is to provide an anti-fogging article which is excellent in durability, wear resistance, anti-fogging property and anti-fogging substainability property, wherein the same is an anti-fogging article in which a film having a metal oxide fine particles having a grain size from 4 through 300 nm and having metal oxides used as its matrix is coated on a substrate and dents and projections having an arithmetical mean roughness (Ra) from 1.5 to 80 nm and their mean interval (Sm) from 4 to 300 nm are formed on the abovementioned film surface, as necessary, the corresponding film contains a surface-active agent and a phosphate compound, and further as necessary, organosilane or its hydrolyzed substance containing in the molecule at least a functional group which is selected from a group consisting of polyalkylene oxide group, alkyl group, alkenyl group, and aryl group is covered on the corresponding dents and projections, and further as necessary, a surface-active agent layer is secured thereon or on the corresponding dents and projections.
91 Citations
41 Claims
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1. An anti-fogging article being a film consisting essentially of
(1) metal oxide fine particles having a grain size from 4 to 300 nm of 5 to 80% by weight, (2) negative-ionized surface-active agent of 0 to 15% by weight, and (3) a balance of metal oxides coated on a substrate, said film surface having dents and projections having an arithmetical mean average (Ra) from 1.5 to 80 nm and a mean interval (Sm) of dents and projections from 4 to 300 nm formed on said film surface.
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20. A method for producing anti-fogging articles, being characterized in that a liquid consisting essentially of metallic oxide fine particles having a grain size of 4 through 300 nm and at least one selected from a group consisting of
(1) metal alkoxide, all functional groups of which are alkoxyl groups (2) tetrachlorosilane, (3) hydrolyzed substance of said (1) and (2), and (4) negative-ionized surface-active agent 0 to 18% by weight with respect to the solid content of the liquid, are coated onto the surface of a substrate, dried and heated as necessary, to cause a dent and projection film of metal oxide to be formed on the surface of the substrate.
Specification