摘要:
For obtaining a substrate on the surface of which a water repellent film is firmly bonded through an undercoating film, and which shows a low critical inclination angle, superior durability, and high density, a water repellent and/or oil repellent film layer is formed by using a liquid for undercoating treatment. The liquid for undercoating treatment is obtained by dissolving and reacting a material having chlorosilyl radicle radicle in molecular form therein and is dissolved into an alcohol group solvent, so that a surface roughness (Ra) of less than 0.5 nm is obtained, thereby achieving high durability and a low critical inclination angle.
摘要:
A coating solution for water-repellent, oil-repellent, stain-proofing treatment is provided which does not become cloudy even if it is stored for a long time. Furthermore, a method for water-repellent, oil-repellent, stain-proofing treatment with the use of this coating solution is provided. The coating solution for water-repellent, oil-repellent, and stain-proofing treatment is obtained by mixing a first solution containing a fluoroalkyl group-containing silane and a second solution containing acid and a solvent, and this coating solution is used for the method for water-repellent, oil-repellent, stain-proofing treatment.
摘要:
Coating liquid prepared by dissolving an acid and a silicon alkoxide into alcohol, containing at least one of either a silicon alkoxide or a hydrolyzate thereof (including a partial hydrolyzate) in an amount of 0.010 to 3% by weight (in terms of silica), an acid in terms of 0.0010 to 1.0 normality, and water in terms of 0 to 10% by weight is coated on a substrate to produce an article coated with a silica-based film. By this method for producing a silica-based film coated article, an excellent silica-based film coated article can be obtained without requiring baking and pretreatment. Furthermore, a functional film coated article excellent in durability can be produced in a short period of time and safely by using the abovementioned silica-based film as a primer film and applying thereon an organosilane having a hydrolyzable group and a functional group having a specific function or a hydrolyzate thereof.
摘要:
There are provided articles coated with high-performance water-repellent films with high hardness that can withstand outdoor use, which are water-repellent film-coated articles that comprise a substrate and a water-repellent film composed mainly of silicon oxide and having a water-repellent group coated on the surface of the substrate, and are characterized by containing at least one type of metal oxide selected from the group consisting of magnesium oxide, calcium oxide, strontium oxide and boron oxide, as well as a process for preparation of such water-repellent film-coated articles at a high rate of productivity and a coating liquid composition for preparation of such water-repellent film-coated articles.
摘要:
The present invention provides an article with a silica-based film, wherein the film does not separate from a substrate after the Taber abrasion test prescribed in Japanese Industrial Standards (JIS) R 3212 although the thickness of the film formed by a sol-gel process exceeds 300 nm. This film can be formed by an improved sol-gel process, that is, a sol-gel process by using a coating solution wherein silicon alkoxide has a concentration of more than 3 mass % and less than 9 mass % in terms of a SiO2 concentration, the molality of protons is 0.001 to 0.2 mol/kg, and the number of moles of the water is at least four times and at most ten times the total number of moles of the silicon atoms, and by heating a substrate at the temperature above 100° C.
摘要:
The invention is an coated article composed of a substrate and an organic-inorganic composite film, which is coated on the substrate and has an oxide of a cation atom capable of forming an oxide network coated on the surface of the substrate, and the same has a part of oxygen of the oxide substituted by an organic group, wherein the organic-inorganic composite film includes alkaline metal oxides at a ratio of 0.1 through 30% of the total number of the alkaline metal atoms and the cation atoms expressed in terms of the number of alkaline metal atoms, and the article coated with a high-performance organic-inorganic composite film, is able to withstand outdoor uses and has high hardness.
摘要:
A method of producing hollow alumina particles in which the grain size of hollow alumina particles is controlled and in which a high formation ratio of hollow particles is obtained while suppressing the formation of solid particles. The method includes irradiating supersonic waves to an aqueous solution containing aluminum nitrate or aluminum acetate, and a surfactant or an organic acid to generate micro-liquid droplets in an atomized state, introducing only minute liquid droplets having a certain grain size or less, which have been classified by an air stream, into a furnace and burning them in air.
摘要:
An article coated with a functional coating film which has a base material, a primer layer coating the surface of the base material and having fine roughness and a functional layer coating the primer layer. The primer layer having fine roughness has portions formed by unevenly accumulating fine particles. The primer layer in the article contains silicon oxide as the main component, and the excellent transparency and the fine roughness are simultaneously exhibited.
摘要:
A sol-form application liquid 3 is prepared by mixing together two solvents A and B and two film components C and D. The sol-form application liquid 3 thus prepared is applied onto a glass substrate 200, thus forming a mixed layer 401 on the glass substrate 200. The glass substrate 200 having the mixed layer 401 formed thereon is left at room temperature, whereupon the solvent A evaporates and phase separation of the mixed layer 401 into an upper layer 403 and a lower layer 402 occurs. The mixed layer 401 is then heated, thus evaporating the solvent B in the lower layer 402 and gelating the film component C in the upper layer 403 and the film component D in the lower layer 402, and hence forming an internal scattering layer 404.
摘要:
The present invention improves abrasion resistance and persistence of anti-fogging properties of an anti-fogging article. The anti-fogging article of the present invention includes an article, a porous film formed on the surface thereof, and a hydrophilic film formed thereon. The porous film contains inorganic fine particles and a binder. The binder covers at least a part of surfaces of the inorganic fine particles and is interposed between the inorganic fine particles. The binder contains a metal oxide as its main component and a hydrophilic organic group other than an alkoxyl group. The hydrophilic film contains a hydrophilic organic polymer.