Silicate-containing antifog coatings
AssigneeDuPont Teijin Films U.S. Limited Partnership
InventorsChen Zhao, Cornell Chappell, Jr.
Life of this patent
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Abstract
A coating composition comprising an alkali metal silicate, a wetting agent, and a hydrophilic antifog agent forms an antifog coating on a substrate. The coating may be applied to the surface of a film from an aqueous dispersion of the ingredients, followed by drying to form a composite film.
Claims14
A composite film comprising a polyester film substrate having first and second sides, and on at least one of said first and second sides a coating composition comprising an alkali metal silicate, a wetting agent, and a hydrophilic antifog agent, wherein the hydrophilic antifog agent has a molecular weight no greater than 20,000 Daltons.
A composite film comprising a polyester film substrate having first and second sides, and on at least one of said first and second sides a coating composition comprising an alkali metal silicate, a wetting agent, and a hydrophilic antifog agent, wherein the hydrophilic antifog agent comprises a compound having three or more polyoxyethylene chains.
Dependencies are inferred from the claim text.