Hydrophilic film and method for forming same on substrate
First Claim
1. A hydrophilic article comprising:
- a substrate; and
a hydrophilic film formed on the substrate,wherein the film has a hydrophilic outermost layer, wherein the outermost layer has a matrix phase and a disperse phase distributed over the matrix phase, wherein the matrix phase comprises a combination of titania and an amorphous metal oxide and the disperse phase comprises at least one compound which is selected from the group consisting of silica and alumina and is in a form of particles, wherein the amorphous metal oxide has a particle diameter that is less than that of the at least one compound.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a hydrophilic film formed on a substrate. This film has a hydrophilic outermost layer having a matrix phase containing titania and a disperse phase constituted of at least one compound of silica and alumina. The matrix phase may further contain an amorphous metal oxide. With this, the outermost layer becomes superior in abrasion resistance. The at least one compound of the disperse phase may be a non-spherical colloidal silica. With this, the outermost layer becomes substantially improved in scratch resistance. The outermost layer is formed on the substrate by a method including sequential steps of (a) providing a sol mixture including a first sol containing a precursor of the titania and a second sol containing the at least one compound; (b) coating the substrate with the sol mixture, thereby to form thereon a precursory film; and (c) baking the precursory film into the outermost layer.
157 Citations
19 Claims
-
1. A hydrophilic article comprising:
-
a substrate; and a hydrophilic film formed on the substrate, wherein the film has a hydrophilic outermost layer, wherein the outermost layer has a matrix phase and a disperse phase distributed over the matrix phase, wherein the matrix phase comprises a combination of titania and an amorphous metal oxide and the disperse phase comprises at least one compound which is selected from the group consisting of silica and alumina and is in a form of particles, wherein the amorphous metal oxide has a particle diameter that is less than that of the at least one compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A hydrophilic article comprising:
-
a substrate; and a hydrophilic film formed on the substrate, wherein the film has a hydrophilic outermost layer, wherein the outermost layer has a matrix phase and a disperse phase distributed over the matrix phase, wherein the matrix phase comprises a combination of titania and an amorphous metal oxide and the disperse phase comprises at least one compound which is selected from the group consisting of silica and alumina and is in a form of particles, wherein the amorphous metal oxide has a particle diameter that is less than that of the said at least one compound, the outermost layer prepared by a method comprising the sequential steps of; (a) providing a sol mixture including a first sol containing a precursor of the titania, a second sol containing the at least one compound, and a third sol containing a precursor of the amorphous metal oxide; (b) coating the substrate with the sol mixture, thereby to form thereon a precursory film; and (c) baking the precursory film into the outermost layer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification