Hydrophilic film, process for producing the same, and paint for formation of hydrophilic film

Abstract

The present invention provides a hydrophilic film, which displays excellent hydrophilicity, and also displays excellent durability with respect to acidic, neutral, and alkaline detergents and chemicals. A hydrophilic film of the present invention comprises a double oxide of silicon and zirconium, an alkali metal, and water. Furthermore, the film may also comprise aluminum or a bivalent metal, and may also contain at least one of a silane coupling agent and an acrylic resin.

1 . A hydrophilic film either comprising a double oxide of silicon and zirconium, and water, or alternatively, comprising a mixture of oxides of silicon and zirconium, and water.  
     
     
         2 . A hydrophilic film according to  claim 1 , further comprising an alkali metal or silver.  
     
     
         3 . A hydrophilic film according to  claim 1 , further comprising aluminum.  
     
     
         4 . A hydrophilic film according to  claim 1 , comprising a bivalent metal.  
     
     
         5 . A hydrophilic film according to  claim 1 , comprising at least one of a silane coupling agent and a resin.  
     
     
         6 . A coating material for forming a hydrophilic film, comprising a silicon component, a zirconium component, and water.  
     
     
         7 . A coating material for forming a hydrophilic film according to  claim 6 , further comprising an alkali metal or silver component.  
     
     
         8 . A coating material for forming a hydrophilic film according to  claim 7 , comprising at least one of an aluminum component, a bivalent metal component, a silane coupling agent, and a resin.  
     
     
         9 . A process for producing a hydrophilic film comprising the steps of applying a coating material for forming a hydrophilic film according to  claim 6  to a substrate, and conducting a hydration reaction.  
     
     
         10 . A hydrophilic film according to  claim 2 , further comprising aluminum.  
     
     
         11 . A coating material for forming a hydrophilic film according to  claim 7 , comprising at least one of an aluminum component, a bivalent metal component, a silane coupling agent, and a resin.