WO2006006207A1 - シリカ系微粒子の製造方法、被膜形成用塗料および被膜付基材 - Google Patents
シリカ系微粒子の製造方法、被膜形成用塗料および被膜付基材 Download PDFInfo
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- WO2006006207A1 WO2006006207A1 PCT/JP2004/009733 JP2004009733W WO2006006207A1 WO 2006006207 A1 WO2006006207 A1 WO 2006006207A1 JP 2004009733 W JP2004009733 W JP 2004009733W WO 2006006207 A1 WO2006006207 A1 WO 2006006207A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09C1/3081—Treatment with organo-silicon compounds
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- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/36—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions
- C01B13/363—Mixtures of oxides or hydroxides by precipitation
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/146—After-treatment of sols
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3045—Treatment with inorganic compounds
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/309—Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/68—Particle size between 100-1000 nm
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
- C01P2004/34—Spheres hollow
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
Definitions
- the present invention relates to a silica-based fine particle having a cavity inside, a method for producing the same, a coating-forming coating material containing the silica-based fine particle, and a film containing the silica-based fine particle formed on the substrate surface
- the present invention relates to a coated substrate.
- hollow silica particles having a particle size of about 0.1 to 300 / m are known (see Patent Document 1, Patent Document 2, etc.). Also, active silica is precipitated from an aqueous alkali metal silicate solution onto a core made of a material other than silica, and the material is removed without destroying the silica shell to produce hollow particles made of a dense silica shell. The method is known (see Patent Document 3, etc.).
- micron-sized spherical silica particles having a core-shell structure in which the outer peripheral portion is a shell and the central portion is hollow, the outer shell is denser on the outer side and has a coarser concentration gradient structure on the inner side are known (Patent Document 4). Etc.)
- nanometer-sized composite oxide particles having a low refractive index can be obtained by completely covering the surface of porous inorganic oxide particles with silica or the like.
- a silica coating layer is formed on the core particles of a composite oxide composed of silica and an inorganic oxide other than silica, and then inorganic oxides other than silica are removed. It is proposed that silica-based fine particles with a low refractive index having a cavity inside can be obtained by coating silica (Patent Document).
- Patent Document 1 Japanese Patent Laid-Open No. 6-330606
- Patent Document 2 Japanese Patent Laid-Open No. 7-0113137
- Patent Document 3 Japanese Translation of Special Publication 2000-500113
- Patent Document 4 Japanese Patent Application Laid-Open No. 11-029318
- Patent Document 5 Japanese Patent Laid-Open No. 7-133105
- Patent Document 6 Japanese Patent Laid-Open No. 2001-233611
- the present invention has been developed based on the invention described in Patent Document 6, and is intended to obtain silica-based fine particles having a low refractive index, and is a porous composite oxide.
- Particles primary particles
- inorganic oxides other than silica are removed in the presence of the electrolyte salt, thereby forming a hollow, spherical shape having a cavity inside the outer shell. It aims at providing the manufacturing method of a silica type microparticle.
- Another object of the present invention is to provide a coating material for forming a film, which contains the hollow, spherical silica-based fine particles and a matrix for forming a film, and is excellent in stability, film forming property and the like.
- the present invention forms a coating containing the above-mentioned hollow, spherical silica-based fine particles on the surface of the base material, and has a coating having a low refractive index, excellent adhesion to a resin, strength, antireflection ability, etc. It aims at providing the base material of this.
- the method for producing silica-based fine particles according to the present invention comprises the following steps (a) and (b).
- aqueous solution of silicate and / or an acidic silicic acid solution and an aqueous solution of an alkali-soluble inorganic compound are simultaneously added to an alkaline aqueous solution or, if necessary, an alkaline aqueous solution in which seed particles are dispersed.
- Silica is represented by SiO
- inorganic oxides other than silica are represented by MO.
- step (d) It is preferable to perform the following step (d) on the silica-based fine particle dispersion obtained in step (b).
- step (e) is preferably performed on the silica-based fine particle dispersion obtained in step (d).
- step (2) It is preferable to repeat step (2) a plurality of times.
- step (c) it is preferable to carry out the following step (c) after step (b) or between step (b) and step (d).
- Step (c) To the silica-based fine particle dispersion obtained in the step (b), an alkaline aqueous solution and an organosilicon compound represented by the following chemical formula (1) and / or a partial hydrolyzate thereof are added, Step of forming silica coating layer on fine particles
- R an unsubstituted or substituted hydrocarbon group having 1 to 10 carbon atoms, acrylic group, epoxy group, methacryl group, amino group, CF group, X: 1 carbon number
- the pH of the alkaline aqueous solution or the alkaline aqueous solution in which seed particles are dispersed as required is preferably 10 or more.
- the inorganic oxide other than silica is preferably alumina.
- the silica-based fine particle dispersion obtained above is preferably washed, dried, and fired as necessary.
- the average particle diameter of the silica-based fine particles is preferably in the range of 5 nm to 500 nm.
- the content of alkali metal oxide in the silica-based fine particles or the silica-based fine particle dispersion is 5 ppm or less as M 0 (M: alkali metal element) per silica-based fine particle.
- the content of ammonia and / or ammonium ions in the silica-based fine particles or the silica-based fine particle dispersion is 1500 ppm or less as NH per silica-based fine particles.
- the silica-based fine particles having cavities inside the outer shell according to the present invention have an average particle diameter in the range of 5 500 nm, a refractive index in the range of 1.15-1.38, and the silica is made of SiO. Represents silica
- the content of alkali metal oxide is 5 ppm as M 0 (M: alkali metal element).
- the content of ammonia and / or ammonium ions in the silica-based fine particles is preferably 1500 ppm or less as NH.
- the coating material for forming a film according to the present invention comprises the silica-based fine particles or the silica-based fine particles obtained by the production method and a film-forming matrix.
- the substrate with a coating according to the present invention is a coating comprising the silica-based fine particles or the silica-based fine particles obtained by the production method and a film-forming matrix, either alone or together with other coatings on the surface of the substrate. It is formed.
- the composite oxide particles (primary particles) are grown in the presence of the electrolyte salt, so that the composite oxide fine particles maintain a spherical shape even in the subsequent de-elementalization step.
- silica-based fine particles having a very low refractive index can be obtained by an extremely simple production process that is not destroyed. It is also excellent in terms of production reproducibility and productivity of silica-based fine particles.
- the film is aged after forming a silica coating layer or aging, hydrothermal treatment is performed at a high temperature, so that alkali metal oxides and ammonia are reduced.
- the resulting film is excellent in strength.
- the coating material for forming a film of the present invention has excellent stability because the content of the alkali metal oxide and ammonia in the silica-based fine particles or silica-based fine particle dispersion liquid is small, and the film obtained using this has a high strength. Is excellent.
- the coated substrate of the present invention has a low refractive index and is excellent in adhesion to a resin, strength, transparency, anti-reflection ability, and the like.
- FIG. 1 is a transmission electron micrograph (TEM) of silica-based fine particles obtained in Example 12.
- TEM transmission electron micrograph
- the method for producing silica-based fine particles according to the present invention comprises the following steps (a) and (b), which are essential steps. In addition to these steps, the following steps (c), (d) or (e) may be included. That is, the method for producing silica-based fine particles according to the present invention includes (a) + (b), (a) + (b) + (c), (a) + (b) + (d), ( a) + (b) + (c) + (d), (a) + (b) + (d) + (e), and (a) + (b) + (c) + (d) + ( and e). Each process will be described below.
- aqueous solution of silicate and / or an acidic silicic acid solution and an aqueous solution of an alkali-soluble inorganic compound are simultaneously added to an alkaline aqueous solution or, if necessary, an alkaline aqueous solution in which seed particles are dispersed.
- Silica is represented by SiO
- inorganic oxides other than silica are represented by MO.
- the electrolyte salt is converted into the ratio (M) / ( M) is 0.1-1
- R unsubstituted or substituted hydrocarbon group having 1 to 10 carbon atoms, acrylic group, epoxy group, methacryl group, amino group, CF group, X: alkoxy group having 1 to 4 carbon atoms, silanol group, halogen Or hydrogen, n: an integer of 0 3)
- silicates selected from alkali metal silicates, ammonium silicates, and organic base silicates are preferably used.
- Al-rich metal silicates are sodium silicate (water glass) and potassium silicates.
- Organic bases are quaternary ammonium salts such as tetraethyl ammonium salt, monoethanolamine, diethylanolamine, triethanol.
- Ammine silicates or organic base silicates include alkaline solutions in which ammonia, quaternary ammonium hydroxide, and amine compounds are added to the silicate solution.
- a silicic acid solution obtained by removing alkali by treating an alkali silicate aqueous solution with a cation exchange resin can be used.
- pH 2 to pH 4 and SiO concentration is about 7% by weight.
- the following acidic silicic acid solutions are preferred.
- Examples of the inorganic oxide include one or more of Al 2 O 3, B 2 O, TiO, ZrO, SnO, Ce 2 O 3, P 2 O, Sb 2 O, Mo 0, Zn 0, and WO.
- Examples of the two or more inorganic oxides include TiO-AlO and TiO-ZrO.
- an alkali-soluble inorganic compound as a raw material for such an inorganic oxide.
- an alkali aqueous solution of the inorganic compound is separately prepared in advance or a mixed aqueous solution is prepared, and silica for the purpose of this aqueous solution is prepared.
- silica for the purpose of this aqueous solution is prepared.
- it is gradually added to an alkaline aqueous solution, preferably an alkaline aqueous solution of pHIO or higher, with stirring.
- the addition ratio of silica raw material and inorganic compound added to the alkaline aqueous solution is the molar ratio when the silica component is expressed by SiO and the inorganic compound other than silica is expressed by M ⁇ M ⁇ / SiO force SO
- the structure of the composite oxide fine particles is mainly a structure in which silicon and elements other than silicon are alternately bonded through oxygen. That is, oxygen atoms are bonded to the four bonds of silicon atoms, and a large number of structures in which elements M other than silica are bonded to these oxygen atoms are formed, and the elements M other than silica are removed in step (b) described later. At this time, silicon atoms can be removed as silicic acid monomers and oligomers in association with the element M.
- the seed particle dispersion when preparing the composite oxide fine particle dispersion, it is also possible to use the seed particle dispersion as a starting material.
- seed particles inorganic oxides such as SiO, AlO, TiO, ZrO, SnO, and CeO or complex oxides thereof, for example,
- Fine particles such as SiO 2 —Al 2 O, Ti 0 —Al 0, Ti 0 —ZrO, SiO—TiO, SiO—TiO 2 —Al 2 O, and the like can be used.
- Such a dispersion of seed particles can be prepared by a conventionally known method. For example, it can be obtained by adding an acid or alkali to a metal salt, a mixture of metal salts, or a metal alkoxide corresponding to the inorganic oxide, hydrolyzing it, and aging as necessary.
- the aqueous solution of the compound is preferably added to the seed particle-dispersed alkaline aqueous solution adjusted to pHIO or higher with stirring in the same manner as in the method of adding the above-mentioned alkaline aqueous solution.
- the composite oxide using seed particles as seeds When the fine particles are grown, it is easy to control the particle size of the grown particles, and particles with uniform particle sizes can be obtained.
- the addition ratio of the silica raw material and the inorganic oxide added to the seed particle dispersion is set in the same range as the case of adding to the aqueous alkali solution.
- silica raw material and inorganic oxide raw material described above have high solubility on the alkali side. However, if both are mixed in this high solubility and pH range, the solubility of oxalate ions such as silicate ions and anolemate ions decreases, and these composites precipitate and grow into colloidal particles. Alternatively, the particles grow on the seed particles.
- the organosilicon compound and z or a hydrolyzate thereof shown in (2) may be added to an alkaline aqueous solution.
- organosilicon compound examples include tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, Dimethyldiethoxysilane, phenyltriethoxysilane, diphenylmethoxysilane, isobutyltrimethoxysilane, vinyltrimethoxysilane, butyltriethoxysilane, vinyltris (j3methoxyethoxy) silane, 3, 3, 3-trifluoro Propyltrimethoxysilane, methyl-3,3,3-trifluoropropyldimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, ⁇ -glycid
- the above-mentioned organosilicon compound having n of 1 to 13 is poor in hydrophilicity. Therefore, it is preferable that the compound be uniformly mixed in the reaction system by hydrolysis in advance.
- a well-known method can be adopted as a hydrolysis method of these organosilicon compounds.
- a basic catalyst such as an alkali metal hydroxide, aqueous ammonia, or amine
- a hydrolyzate is prepared using an acidic catalyst such as an organic acid or an inorganic acid, it is preferable to remove the acidic catalyst by ion exchange or the like after the hydrolysis.
- the obtained hydrolyzate of organosilicon compound is preferably used in the form of an aqueous solution.
- the aqueous solution means a state where the hydrolyzate is not in a cloudy state as a gel but has transparency.
- the electrolyte salt is added in the step (a).
- the ratio (M / M) of the number of moles of electrolyte salt (M) to the number of moles of SiO (M) is in the range of 0.1 1 to 10, preferably 0.2 to 8.
- electrolyte salt examples include water-soluble electrolyte salts such as sodium chloride, potassium chloride, sodium nitrate, potassium nitrate, sodium sulfate, potassium sulfate, ammonium nitrate, ammonium sulfate, magnesium chloride, and magnesium nitrate.
- the electrolyte salt can be added continuously or intermittently while adding an inorganic compound other than alkali metal silicate or silica, which can be added in its entirety, and growing the composite oxide fine particles. Also good.
- the amount of electrolyte salt added depends on the concentration of the composite oxide fine particle dispersion, but when the molar ratio (M ZM) is less than 0.1, the effect of controlling the electrolyte salt becomes insufficient.
- M ZM molar ratio
- the composite oxide fine particles when removing at least a part of the elements other than silicon constituting the composite oxide fine particles by covering the acid, the composite oxide fine particles cannot be maintained in a spherical shape and are destroyed, and the silica force system has a cavity inside. It may be difficult to obtain fine particles.
- the reason for this is not clear, the amount of silica on the surface of the grown complex oxide particles increases, and the acid-insoluble silica protects the complex oxide particles. It also works like a membrane it is considered as.
- the average particle size of the primary particles when the electrolyte salt is added is less than 5 nm, new fine particles are formed and the primary particles do not selectively grow, and the particle size distribution of the composite oxide particles May be non-uniform. If the average particle diameter of the primary particles when adding the electrolyte salt exceeds 300 nm, it may take time or difficulty to remove elements other than silicon in step (b).
- the composite oxide fine particles obtained in this way have an average particle diameter in the range of 5500 nm, which is comparable to the silica fine particles finally obtained.
- step (b) hollow spherical silica-based fine particles having cavities therein are produced by removing some or all of the elements other than silicon constituting the composite oxide fine particles from the composite oxide fine particles.
- the complex oxide fine particle dispersion is mixed with the number of moles of electrolyte salt (M).
- the ratio (M / M) of SiO to the number of moles (M) is in the range of 0.1-10, preferably 0.2-8.
- the electrolyte salt after adding the electrolyte salt again as necessary, for example, it can be dissolved and removed by adding mineral acid or organic acid, or contacted with a cation exchange resin to remove ions, or these methods can be used. Are removed by combining.
- the concentration of the composite oxide fine particles in the composite oxide fine particle dispersion is 0.1 to 50% by weight, particularly 0.5 to 25% by weight in terms of a power oxide that varies depending on the treatment temperature. It is preferable to be in the range.
- concentration of the composite oxide fine particles is less than 0.1% by weight, the amount of silica dissolved increases, and the shape of the composite oxide fine particles may not be maintained. To do.
- concentration of the composite oxide fine particles exceeds 50% by weight, the dispersibility of the particles becomes insufficient, and the composite oxide fine particles with a high content of elements other than silicon are uniformly or efficiently less frequently. May not be removed.
- the removal of the above elements can be achieved by using the silica-based fine particles obtained by MO / SiO, 0.0001-0.2,
- the same organosilicon compound as in the step (a) can be used.
- a silica coating layer is dense, the inside is kept in a gas phase or a liquid layer having a low refractive index, and when used for forming a film, a substance having a high refractive index, such as a coating resin, etc. Thus, it is possible to form a film having a high low refractive index effect that does not enter the inside.
- it can be used after being surface-treated with a silane coupling agent or the like, and since it is excellent in dispersibility in an organic solvent, affinity with a resin, etc., such treatment is not particularly required.
- a fluorine-containing organic silicon compound is used for forming the silica coating layer, since the coating layer containing F atoms is formed, the resulting particles have a lower refractive index and are resistant to an organic solvent.
- a silica-based fine particle dispersion having high affinity with a resin having good dispersibility can be obtained.
- fluorine-containing organosilicon compounds include 3, 3, 3_trifluoropropyltrimethoxysilane, methyl-3,3,3_trifluoropropyldimethoxysilane, heptadecafluoro
- Examples include fluorooctyltrimethoxysilane. Further, the compound represented by the chemical formula (2) as the following [Chemical Formula 2] and the compound represented by the chemical formula (3) as the following [Chemical Formula 3] have the same effect, and therefore can be preferably used.
- R 1 and R 2 and R 1 and R 7 may be the same or different from each other, an alkyl group, a halogenated alkyl group, an aryleno group, An alkylaryl group, an arylenorequinolene group, an alkenyl group, a hydrogen atom or a halogen atom;
- R 3 — R 6 may be the same or different from each other, and may be an alkoxy group, an alkyl group, a halogenated alkyl group, an aryleno group, an anoleno quinoa linole group, an areno eno quinole group, an alkenyl group.
- X represents-(C H F)
- a is an integer that is an even number of 2 or more
- b and c are even numbers of 0 or more a b c
- methoxysilane represented by (CH 2 O) SiC H C F C H Si (CH 2 O) is represented by (CH 2 O) SiC H C F C H Si (CH 2 O)
- step (d) after washing as necessary, the silica-based fine particle dispersion is aged in the range of room temperature to 300 ° C.
- the dispersion from which the element has been removed can be washed by a known washing method such as ultrafiltration, if necessary, and a part of the element other than the dissolved key is removed by washing.
- a known washing method such as ultrafiltration, if necessary, and a part of the element other than the dissolved key is removed by washing.
- a zonore in which silica particles with high dispersion stability are dispersed can be obtained. It is done.
- the dispersion from which the element has been removed is a part of the element other than the dissolved element or alkali metal ion, alkaline earth metal by contact with the cation exchange resin and Z or anion exchange resin. Ions and ammonium ions can be removed The In addition, when washing, heating can be effectively performed.
- the silica coating layer becomes uniform and denser, and as described above, substances having a high refractive index cannot enter the inside of the particle, so that it is possible to form a film having a high low refractive index effect. it can.
- step (e) after washing as necessary, hydrothermal treatment is performed in the range of 50 to 300 ° C.
- a conventionally known method can be adopted as in the step (d).
- the hydrothermal treatment temperature is less than 50 ° C, the content of alkali metal oxide and / or ammonia in the finally obtained silica-based fine particles or silica-based fine particle dispersion cannot be effectively reduced.
- the effect of improving the stability and film formation of the coating film-forming paint is insufficient, and the strength of the resulting film is insufficiently improved.
- the silica-based fine particles may agglomerate in some cases without further improving the stability, film-forming property, film strength, etc. of the coating material for film formation. If the temperature is in the range of 150 ° C-300 ° C, silica-based fine particles are used, and the resulting film has excellent water resistance.If water drops fall on the film, they can be wiped off or immediately dried. In addition, it is possible to obtain an effect such that traces of water drops hardly remain.
- Step (e) may be repeated a plurality of times. By repeating the step (e), the content of alkali metal oxide and Z or ammonia (including ammonium ions) in the resulting silica-based fine particles can be reduced.
- the silica-based fine particles obtained in this way preferably have an average particle size in the range of 5 to 500 nm, more preferably 10 to 400 nm. If the average particle size is less than 5 nm, sufficient cavities cannot be obtained, and the low refractive index effect may not be sufficiently obtained.
- the average particle size is 500nm If it exceeds, it becomes difficult to obtain a stable dispersion, and irregularities may be formed on the surface of the coating film containing the fine particles, or haze may be increased.
- the average particle size of the silica-based fine particles of the present invention can be determined by a dynamic light scattering method.
- the content of the alkali metal oxide in the silica-based fine particles is preferably 5 ppm or less, more preferably 2 ppm or less as M0 (M: alkali metal element).
- M alkali metal element
- the content of ammonia (including ammonium ions) in the silica-based fine particles is preferably 1500 ppm or less, more preferably lOOOppm or less as NH. If the content of ammonia exceeds 1500 ppm, the coating composition containing silica-based fine particles is not sufficiently stable, the viscosity is increased, and the film-forming property is lowered as in the case of the alkali metal oxide. However, the strength of the resulting film may be insufficient or the film thickness may be non-uniform.
- the obtained silica-based fine particle dispersion is replaced with an organic solvent using an ultrafiltration membrane, a rotary evaporator, or the like. Can be obtained.
- the ability to dry after washing and to burn as necessary can be achieved.
- the silica-based fine particles obtained in this way have cavities inside and have a low refractive index. Therefore, a film formed using the silica-based fine particles has a low refractive index, and a film excellent in antireflection performance can be obtained.
- the silica-based fine particles according to the present invention have cavities inside. For this reason, the refractive index of silica-based fine particles was 1.15-1.38, whereas the refractive index of silica was usually 1.45.
- the cavity can be confirmed by observing a transmission electron micrograph (TEM) of the particle cross section.
- FIG. 1 shows a transmission electron micrograph (TEM) of the silica-based fine particles obtained in Example 12.
- the coating film-forming paint according to the present invention comprises the silica-based fine particles, the film-forming matrix, and an organic solvent blended as necessary.
- the film-forming matrix refers to a component that can form a film on the surface of the base material, and can be used by selecting from a resin that conforms to conditions such as adhesion to the base material, hardness, and coatability.
- a resin that conforms to conditions such as adhesion to the base material, hardness, and coatability.
- polyester resin acrylic resin, urethane resin, salted bull resin, epoxy resin, melamine resin, fluorine resin, silicon resin, petitanol resin, phenol resin, vinyl acetate resin, ultraviolet curable resin, electron beam Cured resins, emulsion resins, water-soluble resins, hydrophilic resins, mixtures of these resins, and coating resins such as copolymers and modified products of these resins, or hydrolyzable organic silicon such as alkoxysilanes. Examples thereof include compounds and partial hydrolysates thereof.
- an organic solvent dispersion sol in which the dispersion medium of the silica-based fine particle dispersion is replaced with an organic solvent such as alcohol, preferably an organic silicon compound containing the organic group.
- Silica-based fine particles having a silica coating layer formed thereon can be used. If necessary, after treating the fine particles with a known coupling agent, an organic solvent-dispersed sol dispersed in an organic solvent and a coating resin are used. It can be diluted with a suitable organic solvent to make the coating night.
- a hydrolyzable organosilicon compound when used as a matrix, for example, by adding water and an acid or alkali as a catalyst to a mixture of alkoxysilane and alcohol, a partially hydrolyzed product of alkoxysilane. This can be mixed with the sol and diluted with an organic solvent as necessary to obtain a coating solution.
- the coated substrate according to the present invention includes the silica-based fine particles and a film-forming matrix.
- the coating is formed on the substrate surface alone or together with other coatings.
- the substrate is made of glass, polycarbonate, acrylic resin, plastic sheet such as PET, TAC, plastic film, plastic lens, plastic panel, etc., substrate surface such as cathode ray tube, fluorescent display tube, liquid crystal display board, etc.
- a coating is formed on the substrate.
- the coating may be used alone or on a substrate as a protective film, hard coat film, or planarized film.
- the film is formed in combination with a high refractive index film, an insulating film, a conductive resin film, a conductive metal fine particle film, a conductive metal oxide fine particle film, and a primer film used as necessary.
- the coating of the present invention is not necessarily formed on the outermost surface.
- Such a coating is applied to the substrate by a known method such as a dipping method, a spray method, a spinner method, or a mouth coat method, dried, and heated or heated as necessary. It can be obtained by curing by ultraviolet irradiation or the like.
- the refractive index of the coating film formed on the surface of the base material is a force that is different depending on the mixing ratio of silica-based fine particles and matrix components and the refractive index of the matrix used. Become a rate.
- the refractive index of the silica-based fine particle itself of the present invention was 1.15-1.38. This is because the silica-based fine particles of the present invention have cavities inside, matrix forming components such as resins remain outside the particles, and the cavities inside the silica-based fine particles are retained.
- the refractive index of the substrate when the refractive index of the substrate is 1.60 or less, a coating having a refractive index of 1.60 or more (hereinafter referred to as an intermediate coating) is formed on the surface of the substrate. It is recommended to form a film containing the silica-based fine particles of the present invention after the formation. If the refractive index of the intermediate coating is 1.60 or more, a coated substrate having a large difference from the refractive index of the coating containing the silica-based fine particles of the present invention and excellent antireflection performance can be obtained.
- the refractive index of the intermediate coating can be adjusted by the refractive index of the metal oxide fine particles used to increase the refractive index of the intermediate coating, the mixing ratio of the metal oxide fine particles and the resin, and the refractive index of the resin used.
- the coating solution for forming an intermediate coating is a mixed solution of metal oxide particles and a matrix for forming a coating, and an organic solvent is mixed as necessary.
- a film forming matrix The same coating film containing silica-based fine particles of the present invention can be used, and by using the same coating film forming matrix, a coated substrate having excellent adhesion between both coating films can be obtained.
- a primary particle dispersion was prepared.
- Purified water 125 g was added to 500 g of the dispersion of composite oxide fine particles (1) that had been washed with a filtration membrane to a solid content of 13 wt%, and concentrated hydrochloric acid (concentration 35.5 wt%) was further added dropwise. It was adjusted to pHl.O and dealuminated. Next, separate the aluminum salt dissolved in the ultrafiltration membrane while adding 10 L of pH 3 hydrochloric acid solution and 5 L of pure water, and wash the silica-based fine particles (P-1-1) with a solid content of 20% by weight. A dispersion was obtained. The Na O content and NH content of the aqueous dispersion of this silica fine particle (P-1-1) were less than ⁇ m and lOppm per silica fine particle, respectively.
- aqueous ammonia is added to the dispersion of silica-based fine particles (P-1-1) to adjust the pH of the dispersion to 10.5, and after aging at 150 ° C for 11 hours, After cooling and ion exchange using 400 g of cation exchange resin (Mitsubishi Chemical Corporation: Diaion SK1B) for 3 hours, Then, 200g of anion exchange resin (Mitsubishi Chemical Corporation: Diaion SA20A) was used for 3 hours of ion exchange, and then 200g of cation exchange resin (Mitsubishi Chemical Corporation: Diaion SK1B) was used. Washing was performed by ion exchange at 80 ° C.
- an aqueous dispersion of silica-based fine particles (P-to 2) having a solid content concentration of 20% by weight.
- the Na 2 O content and NH content of the aqueous dispersion of silica-based fine particles (P-1-2) were 6 ppm and 1200 ppm, respectively, per silica-based fine particle.
- the silica-based fine particle (P-1-2) dispersion was again hydrothermally treated at 150 ° C for 11 hours, and then washed with an ultrafiltration membrane while holding 5 L of pure water to obtain a solid content.
- An aqueous dispersion of silica-based fine particles (P-to 3) having a concentration of 20% by weight was obtained.
- the Na 2 O content and NH content of the aqueous dispersion of silica-based fine particles (P-1-3) were 0.5 ppm and 600 ppm per silica-based fine particle, respectively, and then an ultrafiltration membrane was used.
- An alcohol dispersion of silica-based fine particles (P-1) having a solid content concentration of 20% by weight in which the solvent was replaced with ethanol was prepared.
- Table 1 shows the preparation conditions.
- the average particle diameter was measured by a dynamic light scattering method
- the refractive index was measured by the following method using Series A and AA made by CARGILL as a standard refractive liquid.
- This coating solution was applied to a PET film by a bar coater method and dried at 80 ° C. for 1 minute to obtain a transparent coated substrate (A-1) having a film thickness of SlOOnm.
- Table 2 shows the total light transmittance, haze, reflectance of light having a wavelength of 550 nm, refractive index of the film, and pencil hardness of the substrate with transparent coating (A-1).
- the total light transmittance and haze were measured with a haze meter (manufactured by Suga Test Instruments Co., Ltd.), and the reflectance was measured with a spectrophotometer (JASCO Corporation, Ubest-55).
- the refractive index of the film was measured with an ellipsometer (manufactured by ULVAC, EMS-1).
- the uncoated PET film had a total light transmittance of 90.7%, a haze of 2.0%, and a reflectance of light having a wavelength of 550 nm of 7.0%.
- the pencil hardness was measured with a pencil hardness tester according to JIS K 5400. That is, a pencil was set at an angle of 45 degrees with respect to the surface of the coating, and a predetermined load was applied and the film was pulled at a constant speed to observe the presence or absence of scratches.
- Echirushirike one MSi_ ⁇ concentration of 28 weight 0/0) 20g was added a small amount of hydrochloric acid in a mixed solution of ethanol 45g and pure water 5 ⁇ 33 g, to obtain a matrix dispersion containing the partial hydrolyzate of E chill silicate .
- the matrix dispersion was mixed with 16.7 g of an alcohol dispersion of silica-based fine particles (P-1) (solid content concentration: 18% by weight) to prepare a coating solution.
- This coating solution is applied to the surface of a transparent glass plate by a spinner method under conditions of 500 rpm for 10 seconds, and then heat-treated at 160 ° C for 30 minutes to form a transparent film substrate with a transparent film thickness of 200 nm.
- (B-1) was obtained.
- Table 3 shows the total light transmittance, haze, reflectance of light having a wavelength of 550 ⁇ m, refractive index of the coating, and pencil hardness of the substrate with transparent coating (B-1).
- An uncoated glass substrate has a total light transmittance of 92.0%, a haze of 0.1%, and reflection of light having a wavelength of 550 nm. The rate was 4.5%.
- the NH content was 1 ppm and 2500 ppm for each silica-based fine particle.
- the silica-based fine particle (P-2-2) dispersion was again hydrothermally treated at 150 ° C for 11 hours, then washed with an ultrafiltration membrane while holding 5 L of pure water, and the solid content concentration was 20 wt. % Aqueous dispersion of silica-based fine particles (P-2-3) was obtained.
- the Na 2 O content and NH content of the aqueous dispersion of silica-based fine particles (P-2-3) were 0.5 ppm and 900 ppm, respectively, per silica-based fine particle, and then an ultrafiltration membrane was used to disperse the dispersion medium.
- An alcohol dispersion of silica-based fine particles (P-2) with a solid content concentration of 20% by weight was substituted with ethanol.
- a substrate with a transparent coating (A-2) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-2) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-2) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-2) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- Example 2 silica fine particles having a solid content of 20% by weight (P-3) except that 0.5% by weight of sodium sulfate 50,400 g was used instead of 0.5% by weight of potassium nitrate 30, OOOg. An alcohol dispersion was prepared.
- a substrate with a transparent coating (A-3) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-3) was used instead of the alcohol dispersion of silica fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-3) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-3) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- Example 2 silica-based fine particles having a solid content concentration of 20 wt% (P-) were used in the same manner except that 53,200 g of 0.5 wt% ammonium sulfate was used instead of 50,400 g of 0.5 wt% sodium sulfate.
- the alcohol dispersion of 4) was prepared.
- a substrate with a transparent coating (A-4) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-4) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-4) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-4) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) Obtained.
- Example 2 silica-based fine particles having a solid content of 20% by weight (P-) were used in the same manner except that 50,400 g of sodium sulfate having a concentration of 0.5% by weight was replaced with 41,100 g of ammonium nitrate having a concentration of 0.5% by weight.
- the alcohol dispersion of 5) was prepared.
- a substrate with a transparent coating (A-5) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-5) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-5) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-5) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- Example 2 ethyl silicate 1 HSiO concentration 28 wt%) vinyl instead of 104 ⁇
- Silane manufactured by Shin-Etsu Chemical Co., Ltd .: KBE-1003, concentration 62.7% by weight
- an alcohol dispersion of silica-based fine particles (P-6) with a solid content of 20% by weight was prepared. did.
- a substrate with a transparent coating was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-6) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-6) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-6) was used instead of the alcohol dispersion of silica fine particles (P-1). ) was obtained.
- Example 2 Yore , Echirushirike one MSiO concentration of 28 weight 0/0 concentration 0.2 wt% of sodium sulfate 50, 400 g instead of concentration 0.5 wt% of sodium sulfate 50, 400 g)
- Silica fine particles (P-7) with a solid content of 20% by weight were used in the same manner except that 34.3g of epoxy silane (Shin-Etsu Chemical Co., Ltd .: KMB-403, concentration 84.9% by weight) was used instead of 104g.
- a lecol dispersion was prepared.
- the Na O content and NH content of the aqueous dispersion of silica-based fine particles (P-7-3) are
- a substrate with a transparent coating was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-7) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-7) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-7) was used instead of the alcohol dispersion of silica fine particles (P-1). ) was obtained.
- Example 2 ethylsilicic acid HSiO concentration 28 wt%) 104 ⁇ instead of fluorine
- Alkyl Silane (Shin-Etsu Chemical Co., Ltd .: KMB-7083, concentration 83.8% by weight)
- Alcohol dispersion of silica-based fine particles (P-8) with a solid content of 20% by weight, except that 34.75g was used. was prepared.
- the Na O content and NH content of the aqueous dispersion of silica-based fine particles are They were 0.9 ppm and 800 ppm, respectively, for the force type fine particles.
- a substrate with a transparent coating (A-8) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-8) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-8) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-8) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- step (a) of Example 2 a 0.76 wt% sodium silicate aqueous solution as SiO 900
- Silica fine particles with a solid content of 20% by weight except that 50% and 400g of sodium sulfate with a concentration of 2.0% by weight were used instead of 50 and 400g of sodium sulfate with a concentration of 0.5% by weight (P- The alcohol dispersion of 9) was prepared.
- the Na O content and NH content of the aqueous dispersion of silica-based fine particles were 1 ppm and 800 ppm per silica-based fine particle, respectively.
- a substrate with a transparent coating (A-9) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-9) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating (B-9) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-9) was used instead of an alcohol dispersion of silica-based fine particles (P-1). ) was obtained.
- a substrate with a transparent coating was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-10) was used instead of the alcohol dispersion of silica-based fine particles (P-1). )
- a substrate with a transparent coating (B-10) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-10) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Example 1 an aqueous dispersion of silica-based fine particles (P-1-2) having a solid concentration of 20% by weight was similarly treated except that hydrothermal treatment was not performed. An alcohol dispersion of silica-based fine particles (P-11) was prepared.
- a substrate with a transparent coating (A-11) was prepared in the same manner as in Example 1 except that an alcohol dispersion of silica-based fine particles (P-11) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- a substrate with a transparent coating (B-11) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-11) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Example 2 an aqueous dispersion of silica-based fine particles (P-2-2) having a solid content concentration of 20% by weight was similarly treated except that hydrothermal treatment was not performed.
- Silica An alcohol dispersion of the system fine particles (P-12) was prepared.
- Example 1 a substrate with a transparent coating (A-12) was used in the same manner except that the alcohol dispersion of silica-based fine particles (P-12) was used instead of the alcohol dispersion of silica-based fine particles (P-1). )
- Example 1 a substrate with a transparent coating (B-12) was used in the same manner except that an alcohol dispersion of silica-based fine particles (P-12) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Example 11 silica-based fine particles having a solid concentration of 20% by weight (except for using 0.5% by weight of sodium sulfate 50,400 g instead of 0.5% by weight of potassium nitrate 30, OOOg) An alcohol dispersion of P-13) was prepared.
- a substrate with a transparent coating (A-13) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-13) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- a substrate with a transparent coating (B-13) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-13) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- Example 11 a silica system having a solid content of 20% by weight was used in the same manner except that 53,200 g of 0.5% by weight ammonium sulfate was used instead of 50,400 g of 0.5% by weight sodium sulfate.
- An alcohol dispersion of fine particles (P-14) was prepared.
- a substrate with a transparent coating (A-14) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-14) was used instead of the alcohol dispersion of silica fine particles (Pl). Obtained.
- a substrate with a transparent coating (B-14) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-14) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Example 11 a silica system having a solid content of 20% by weight was used in the same manner except that 50,400 g of sodium sulfate having a concentration of 0.5% by weight was replaced by 41,100 g of ammonium nitrate having a concentration of 0.5% by weight.
- An alcohol dispersion of fine particles (P-15) was prepared.
- a substrate with a transparent coating was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-15) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- a substrate with a transparent coating (B-15) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-15) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Example 11 Echirushirike one HSiO concentration: 28 wt%) 104 vinyl instead of ⁇
- Rusilane manufactured by Shin-Etsu Chemical Co., Ltd .: KBE-1003, concentration 62.7% by weight
- an alcohol dispersion of silica-based fine particles (P-16) with a solid concentration of 20% by weight was prepared in the same manner. did.
- Example 1 silica-based fine particles (P-1) were replaced by silica-based fine particles instead of the alcohol dispersion.
- a substrate with a transparent coating (A-16) was obtained in the same manner except that the alcohol dispersion of particles (P-16) was used.
- a substrate with a transparent coating (B-16) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-16) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- An alcohol dispersion of silica-based fine particles (P-17) having a solid concentration of 20 wt% was prepared in the same manner except that 34.3 g of xysilane (Shin-Etsu Chemical Co., Ltd .: KMB_403, concentration 84.9 wt%) was used.
- a substrate with a transparent coating (A-17) was prepared in the same manner as in Example 1 except that the alcohol dispersion of silica fine particles (P-17) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- a substrate with a transparent coating (B-17) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica fine particles (P-17) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- Example 11 Echirushirike one HSiO concentration: 28 wt%) 104 fluoride instead of ⁇
- Alcohol-based alkylsilane (Shin-Etsu Chemical Co., Ltd .: KMB-7083, concentration 83.8% by weight) Alcohol dispersion of silica-based fine particles (P-18) with a solid content of 20% by weight, except that 34.75g was used. A liquid was prepared.
- Example 1 silica-based fine particles (P-1) were replaced by silica-based fine particles instead of the alcohol dispersion.
- a substrate with a transparent coating (A-18) was obtained in the same manner except that the alcohol dispersion of particles (P-18) was used.
- a substrate with a transparent coating (B-18) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-18) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- step (a) of Example 11 a 76% by weight aqueous sodium silicate solution as SiO 90
- a substrate with a transparent coating (A-19) was prepared in the same manner as in Example 1, except that the alcohol dispersion of silica fine particles (P-19) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- a substrate with a transparent coating (B-19) was prepared in the same manner as in Example 1, except that an alcohol dispersion of silica-based fine particles (P-19) was used instead of an alcohol dispersion of silica-based fine particles (P-1). )
- Silica sol (Catalyst Kasei Kogyo Co., Ltd .: SI-45P, average particle size 45 nm, SiO concentration: 20% by weight) is used as silica-based fine particles, and the dispersion medium is replaced with ethanol by an ultrafiltration membrane.
- silica-based fine particles RP-1
- Na O content and NH content of silica sol are 20500 per silica particle, respectively.
- Example 1 Observation of moon grass ⁇ t (RA-l)
- a substrate with a transparent coating (RA-1) was prepared in the same manner except that an alcohol dispersion of silica fine particles (RP-1) was used instead of the alcohol dispersion of silica fine particles (Pl). Obtained.
- Example 1 a substrate with a transparent coating (RB-1) was used in the same manner except that an alcohol dispersion of silica fine particles (RP-1) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- the average particle diameter of the silica-based fine particles was measured and found to be about 5 nm and the refractive index was 1.43. Further, when a transmission electron micrograph (TEM) was taken and observed, most were fine particles, and there were almost no hollow particles.
- TEM transmission electron micrograph
- An alcohol dispersion of silica-based fine particles (RP-3) having a solid content of 20 wt% was prepared in the same manner except that 0.5 wt% sodium aluminate aqueous solution was used as Al 2 O 3.
- the Na 2 O content and NH content of the aqueous dispersion of silica-based fine particles (RP-1-1) were less than 1200 ppm and lO ppm, respectively, per silica-based fine particle.
- Example 1 a substrate with a transparent coating (RA-3) was similarly used except that an alcohol dispersion of silica fine particles (RP-3) was used instead of the alcohol dispersion of silica fine particles (P-1). )
- Example 1 a substrate with a transparent coating (RB-3) was used in the same manner except that an alcohol dispersion of silica fine particles (RP-3) was used instead of the alcohol dispersion of silica fine particles (P-1). )
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CN2004800433784A CN1972866B (zh) | 2004-07-08 | 2004-07-08 | 二氧化硅类微粒的制备方法、涂膜形成用涂料及覆有涂膜的基材 |
US11/631,357 US10040943B2 (en) | 2004-07-08 | 2004-07-08 | Method of producing silica-based particles |
PCT/JP2004/009733 WO2006006207A1 (ja) | 2004-07-08 | 2004-07-08 | シリカ系微粒子の製造方法、被膜形成用塗料および被膜付基材 |
KR1020077000708A KR101102115B1 (ko) | 2004-07-08 | 2004-07-08 | 실리카계 미립자의 제조방법, 피막 형성용 도료 및피막부착 기재 |
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US8435475B2 (en) | 2007-06-26 | 2013-05-07 | Denki Kagaku Kogyo Kabushiki Kaisha | Spherical organic polymer-silicon compound composite particles, hollow particles and their production methods |
CN103468030A (zh) * | 2013-08-23 | 2013-12-25 | 确成硅化学股份有限公司 | 一种高分散性二氧化硅的制备方法 |
JPWO2013073475A1 (ja) * | 2011-11-15 | 2015-04-02 | 国立大学法人 名古屋工業大学 | ナノ中空粒子およびその製造方法 |
CN107099173A (zh) * | 2017-04-01 | 2017-08-29 | 上海宜瓷龙新材料股份有限公司 | 用于室内墙面的水性无机防涂鸦陶瓷涂料及其制备方法 |
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JP2006348267A (ja) * | 2005-05-16 | 2006-12-28 | Nof Corp | 含フッ素硬化性塗液、含フッ素硬化皮膜及び含フッ素硬化皮膜を用いた減反射材 |
US8435475B2 (en) | 2007-06-26 | 2013-05-07 | Denki Kagaku Kogyo Kabushiki Kaisha | Spherical organic polymer-silicon compound composite particles, hollow particles and their production methods |
JPWO2013073475A1 (ja) * | 2011-11-15 | 2015-04-02 | 国立大学法人 名古屋工業大学 | ナノ中空粒子およびその製造方法 |
CN103468030A (zh) * | 2013-08-23 | 2013-12-25 | 确成硅化学股份有限公司 | 一种高分散性二氧化硅的制备方法 |
CN107099173A (zh) * | 2017-04-01 | 2017-08-29 | 上海宜瓷龙新材料股份有限公司 | 用于室内墙面的水性无机防涂鸦陶瓷涂料及其制备方法 |
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US20080090070A1 (en) | 2008-04-17 |
US10040943B2 (en) | 2018-08-07 |
KR20070030893A (ko) | 2007-03-16 |
KR101102115B1 (ko) | 2012-01-02 |
CN1972866A (zh) | 2007-05-30 |
CN1972866B (zh) | 2010-12-01 |
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