Multilayered water-repellent film and method of forming same on

Details Multilayered water-repellent film and method of forming same on Multilayered water-repellent film and method of forming same on

1996-09-27

1999-01-05

Speer, Timothy M.

Stock material or miscellaneous articles

Composite

Of quartz or glass

428142, 428172, 428432, 428447, 428446, 428701, 428702, B32B 1700

Patent

active

058560165

ABSTRACT:
The invention relates to a multilayered water-repellent film formed on a glass substrate by the sol-gel process. The film has a first metal oxide layer which is formed on the glass substrate by the sol-gel process and a second water-repellent layer formed on the first layer. As a first method for providing the film with superior durability of water repellency, mechanical strength and chemical resistance, the first layer is prepared by using a mixture of three specific sols which are respectively prepared from metal alkoxides or metal acetylacetonates. As a second method for providing the film with the above advantages, the second layer is prepared by using a coating mixture comprising a fluoroalkylsilane, tin oxide particles doped with antimony oxide, a silicon compound, water and an organic solvent. As a third method for providing the film with the above advantages, the second layer is prepared by using another coating mixture comprising a fluoroalkylsilane, tin oxide particles doped with antimony oxide, a silicon compound, water, an organic solvent and an acid.

REFERENCES:
patent: 3958073 (1976-05-01), Trevisan
patent: 4948760 (1990-08-01), Ohwaki
patent: 5073195 (1991-12-01), Cuthbert
patent: 5250322 (1993-10-01), Takahashi
patent: 5266358 (1993-11-01), Uemura
patent: 5268198 (1993-12-01), Yamasaki
patent: 5413865 (1995-05-01), Nakamura
patent: 5674625 (1997-10-01), Takahashi
Abst. "Sol-Gel Film and Its Formation", vol. 18, No. 140, (C-1177), JP-5 319 869, Mar. 12, 1993, (Nissan Motor Co., Ltd.).
Abst. "Water-Repellent Oxide Film and Its Formation", vol. 18 No. 219 (C-1192), JP 601 6455, Jan. 25, 1994, (Nissan Motor Co.).
Database WPI, Derwent Publications Ltd., London, GB; 93-081-179 & JP A-5 024 886 (Nissan Motor Co.), Feb. 2, 1993 abst.
Database WPI, Derwent Publications, Ltd., (Central Glass Co. & Nissan Motor Co.), 94-061909, JP 601 6455.

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