摘要:
The invention relates to a method for applying a coating composition to a substrate with a reverse roller coater so as to form a thin film on the substrate and then for baking the thin film so as to transform the thin film into a metal oxide film. The coating composition comprises: 0.1-10 wt % of at least one organic metal compound on a metal oxide basis; and at least one organic solvent. The at least one organic metal compound is selected from the group consisting of metal alkoxides, metal acetyl-acetonates and metallic soaps. The coating composition is adjusted to have a viscosity within a range from 0.1 to 100 centipoises. In this method, a reverse roller of the coater is rotated at a rotation speed within a range from 2 to 55 m/min. and the substrate is moved at a moving speed within a range from 1 to 30 m/min. while the coating composition is applied to the substrate. Furthermore, the rotation speed of the reverse roller is adjusted to be higher than the moving speed of the substrate. According to the invention, it is possible to form an optical metal oxide film which has a uniform thickness of up to about 10 .mu.m (more particularly up to about 1 .mu.m).
摘要:
The invention relates to a sol-gel method for forming a metal oxide film, e.g. TiO.sub.2 film or TiO.sub.2 -SiO.sub.2 film, on a substrate by applying a solution of at least one metal alkoxide to the substrate to form a sol film on the substrate, drying the sol film to cause it to turn into a gel film by hydrolysis and baking the gel film. According to the invention the viscosity of the metal alkoxide solution is adequately increased, preferably to 3-30 cP at 20.degree. C., by the addition of a combination of a hydroxypropyl cellulose of which 2 wt % aqueous solution has a viscosity of 150-400 cP at 20.degree. C. and another hydroxypropyl cellulose of which 2 wt % aqueous solution has a viscosity of 6-10 cP at 20.degree. C. Metal oxide films formed by this method are free from minute cracks and excellent in optical characteristics and durability. By this method it is possible to form a metal oxide film as thick as about 300 nm without repeating the application of the alkoxide solution to the substrate.
摘要:
An ink composition for forming a thin metal oxide film contains a glass component, a viscosity-increasing agent and a solvent. The glass component is one of a halogen-containing metal alkoxide, a mixture of the halogen-containing metal alkoxide and another metal alkoxide, and a mixture of the halogen-containing metal alkoxide and a metal oxide sol. The viscosity-increasing agent is nitrocellulose H60 according to Japanese Industrial Standard K6703. The solvent is at least one of ethylcarbitol and butylcarbitol. The formed thin metal oxide film is superior in transparency, abrasion resistance and scratch resistance.
摘要:
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.
摘要:
An ink composition for forming a thin metal oxide film contains a glass-forming component, a solvent and 10-25 wt % of a viscosity-increasing agent. The glass-forming component is one of a halogen-containing metal alkoxide, a mixture of the halogen-containing metal alkoxide and another metal alkoxide, and a mixture of the halogen-containing metal alkoxide and a metal oxide sol. The viscosity-increasing agent is at least one selected from the group consisting of nitrocellulose H7, nitrocellulose H20, nitrocellulose H60. nitrocellulose H80 and nitrocellulose H120, each of which is according to Japanese Industrial Standard K 6703. The solvent is at least one selected from the group consisting of ethylcarbitol and butylcarbitol. The ink composition has a viscosity within a range from 200 to 300 poises. The thus prepared ink composition is prolonged in pot life. The thin metal oxide film prepared from the ink composition has a refractive index substantially the same as the theoretical value and is colorless, uniform in thickness, and excellent in optical characteristics, abrasion resistance, scratch resistance and durability.
摘要:
The invention relates to a sol-gel method for forming a patterned film of a metal compound, e.g. TiO.sub.2, SiO.sub.2, ZrO.sub.2, Al.sub.2 O.sub.3, TiN or Si.sub.3 N.sub.4, on a substrate by applying a metal alkoxide sol to the substrate, allowing the sol film on the substrate to turn into a gel film by hydrolysis, removing the gel film in the unnecessary area(s) by selective etching and baking the gel film in the remaining aarea(s). The selective etching of the gel film is easily accomplished by the steps of moistening the gel film in the unnecessary area(s) with a viscous liquid containing, e.g., an organic solvent or an organic acid, hardening the gel film in the remaining area(s) by mild heating, and then removing the gel film in the unnecessary area(s) by washing with a suitable liquid such as an alkali solution or, when said viscous solution contains an organic acid and water, water.
摘要翻译:本发明涉及一种用于形成金属化合物的图案化膜的溶胶 - 凝胶法, TiO 2,SiO 2,ZrO 2,Al 2 O 3,TiN或Si 3 N 4,通过将金属醇盐溶胶施加到基板上,使基板上的溶胶膜通过水解成为凝胶膜,除去不需要的区域中的凝胶膜( s),通过选择性蚀刻和烘烤剩余的aarea中的凝胶膜。 凝胶膜的选择性蚀刻容易通过以下步骤容易地实现:用含有例如有机溶剂或有机酸的粘性液体润湿不需要的区域中的凝胶膜,使剩余区域中的凝胶膜硬化 s),然后通过用合适的液体如碱溶液洗涤或当所述粘性溶液含有有机酸和水时,除去不需要的区域中的凝胶膜。
摘要:
In a production process of an organic-inorganic hybrid glassy material, the invention relates to a process for producing an organic-inorganic hybrid glassy material, characterized in that the process comprises at least the three steps of producing a gel body by a sol-gel method; melting by heating; and aging, and it relates to an organic-inorganic hybrid glassy material produced by this process.
摘要:
In a production process of an organic-inorganic hybrid glassy material, the invention relates to a process for producing an organic-inorganic hybrid glassy material, characterized in that the process comprises at least the three steps of producing a gel body by a sol-gel method; melting by heating; and aging, and it relates to an organic-inorganic hybrid glassy material produced by this process.
摘要:
The invention relates to a reflectance-reducing glass pane which may be a laminated glass pane such as an automobile front windshield. The invention provides a reflectance-reducing glass pane including: a transparent glass substrate having first and second major surfaces opposed to each other; a first reflectance-reducing coating formed on the first major surface of the glass substrate; and a second reflectance-reducing coating formed on the second major surface of the glass substrate. The first coating has at least two metal-oxide layers which are different in refractive index. The second coating has a refractive index of up to 1.50 and is made of one selected from the group consisting of SiO.sub.2 and a mixture of SiO.sub.2 and another metal oxide. The reflectance-reducing glass pane optionally further includes a third water-repellent coating which is formed on the second coating. The third coating comprises a silane compound containing a polyfluoroalkyl group. The reflectance of the glass pane is substantially low, with respect to a visible light incident on the glass pane from a side of the first coating at an incidence angle within a range from 40 to 80 degrees.
摘要:
A thin liquid coating film is coated on a surface of a solid substrate, e.g. a glass plate, by using an incomplete liquid container having an opening of a shape similar to the shape of the surface of the substrate on one side thereof. First the substrate and the incomplete container are brought into tight contact with each other such that the side opening of the container is closed by the surface of the substrate, whereby the container is completed. Next, a coating liquid is fed into the container to thereby wet the substrate surface, and then liquid is extracted from the container so as to lower the liquid level in the container at a predetermined rate while keeping both the container and the substrate stationary. By this method a submicron coating film of uniform thickness can easily be formed even on large-sized substrate, and it is easy to form a coating film on only a limited area of the substrate surface without using any masking.