Hydrophilic film and method for forming same on substrate

Details Hydrophilic film and method for forming same on substrate Hydrophilic film and method for forming same on substrate

1997-08-26

2000-06-06

Speer, Timothy M.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428428, 428432, B32B 1700

Patent

active

060716061

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.

REFERENCES:
patent: 3833399 (1974-09-01), Martyn et al.
patent: 4214908 (1980-07-01), Deguchi et al.
patent: 4232062 (1980-11-01), Okino et al.
patent: 4694218 (1987-09-01), Chao
patent: 5348805 (1994-09-01), Zagdoun et al.

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