WO2000010921A1 - Finely particulate titanium-containing substance, coating fluid containing the same, processes for producing these, and molded article having thin film comprising the substance - Google Patents
Finely particulate titanium-containing substance, coating fluid containing the same, processes for producing these, and molded article having thin film comprising the substance Download PDFInfo
- Publication number
- WO2000010921A1 WO2000010921A1 PCT/JP1999/002712 JP9902712W WO0010921A1 WO 2000010921 A1 WO2000010921 A1 WO 2000010921A1 JP 9902712 W JP9902712 W JP 9902712W WO 0010921 A1 WO0010921 A1 WO 0010921A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- titanium
- aqueous solution
- containing substance
- producing
- substance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3669—Treatment with low-molecular organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
- B01J35/45—Nanoparticles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0536—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing chloride-containing salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/02—Amorphous compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/84—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by UV- or VIS- data
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
-
- 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.]
Definitions
- the present invention relates to a titanium-containing substance having a fine average particle diameter, an aqueous coating liquid containing the same, and a fine titanium-containing substance, a coating liquid containing the same, a method for producing the same, and a molded article having a thin film thereof.
- the present invention relates to a coating solution, a method for producing the same, and a molded article having a thin film of the titanium-containing substance.
- the fine titanium-containing substance of the present invention and the aqueous coating liquid containing the same are suitable for forming a thin film on a substrate such as ceramics or synthetic resin, and the thin film thus formed is Excellent transparency, good photocatalytic action, good adhesion to substrate, and good UV absorption function.
- a substrate such as ceramics or synthetic resin
- the thin film thus formed is Excellent transparency, good photocatalytic action, good adhesion to substrate, and good UV absorption function.
- a thin film of titanium oxide has a photocatalytic action.
- a number of technical capabilities S have been proposed that take advantage of these characteristics.
- a titanium oxide sol is applied to a lighting device, for example, a glass tube of a fluorescent lamp or a cover thereof to form a thin film, and when an organic substance such as oil smoke adheres to the glass tube cover, a photocatalyst of the thin film is formed.
- Techniques have been proposed to decompose the deposits by the action and remove or prevent stains on glass tubes and covers.
- a main object of the present invention is to provide a fine titanium-containing material capable of forming a thin film having improved transparency while maintaining high catalytic activity.
- the present inventors have repeatedly studied a method for producing titanium oxide by hydrolyzing titanium tetrachloride, and hydrolyze titanium tetrachloride in an aqueous solution in the presence of carboxylic acid.
- an aqueous coating solution (sol) of a titanium-containing substance containing fine particles having an average particle diameter of about 0.8 to 50 nm, which is unprecedented, can be obtained. Therefore, they have found that it is possible to form a thin film having an unprecedented transparency while maintaining a high catalytic activity, and have completed the present invention based on these findings.
- an aqueous solution containing a titanium-containing substance having a fine average particle size and containing the titanium-containing substance at a concentration of from 0 :! A fine titanium-containing material characterized in that the aqueous solution has a light transmittance of 85% or more at a wavelength of 450 to 700 nm and a thickness of 10 mm when the temperature is raised to You.
- a coating solution comprising an aqueous solution containing a titanium-containing substance finely dispersed in a concentration of from 0 :! to 6.5 mol / L as titanium, wherein the aqueous solution is brought to a boiling point.
- a titanium-containing coating liquid characterized by having a light transmittance of 85% or more at a wavelength of 450 to 70011111 at a thickness of 10 mm of the aqueous solution is obtained.
- the method for producing a fine titanium-containing substance is characterized in that titanium tetrachloride is hydrolyzed in an aqueous solution in the presence of a carboxylic acid.
- a method for producing a tinting liquid is provided.
- FIG. 1 is a schematic sectional view showing an example of a hydrolysis reaction tank used for producing a fine titanium-containing substance of the present invention.
- FIG. 2 is a graph showing the transmittance at a wavelength of 200 to 700 nm of the aqueous solution containing the fine titanium-containing substance produced in Example 1.
- FIG. 3 is a graph showing the transmittance at a wavelength of 200 to 700 nm of a thin film formed from the aqueous solution containing the fine titanium-containing substance produced in Example 1.
- the fine titanium-containing substance of the present invention can be obtained by hydrolyzing titanium tetrachloride in an aqueous solution in the presence of a carboxylic acid. Although the details of the chemical composition and structure of the fine titanium-containing substance produced by this hydrolysis are unknown, they are single-dispersed and very fine particles, and are required to hydrolyze titanium tetrachloride in an aqueous solution. Therefore, it is clearly different from the conventional titanium dioxide obtained.
- the thin film formed from the aqueous solution in which the titanium-containing substance is finely dispersed according to the present invention maintains a high catalytic activity and has an unprecedented superior transparency compared to a conventional titanium dioxide thin film. are doing.
- the method for producing a fine titanium-containing substance of the present invention is characterized in that a carboxylic acid is allowed to coexist when hydrolyzing titanium tetrachloride in an aqueous solution at an elevated temperature. Titanium tetrachloride can be introduced into a water-soluble organic solvent and hydrolyzed in the organic solvent, but this is not a preferred method.
- the concentration range is preferably 0.1 to 6.5 mol Z liter as titanium.
- a water-soluble carboxylic acid is preferred.
- a water-soluble carboxylic acid is used, the maximum addition effect can be obtained with the smallest possible addition amount.
- Non-water soluble carboxylic acids can also be used, in which case, It may be dissolved in a hydrophilic organic solvent such as a lower or middle alcohol or ketone and then added to water.
- Specific examples of preferred water-soluble carboxylic acids include oxalic acid, citric acid, malic acid, tartaric acid, succinic acid, and the like. Of these, citric acid and tartaric acid are particularly preferred.
- the carboxylic acid is usually used alone, but two or more may be used in combination.
- the preferable addition amount of the carboxylic acid is usually in the range of 0.01 mol to 10 mol, preferably 0.01 mol to 5 mol, per 1 mol of titanium atom.
- the preferred concentration of the carboxylic acid in the aqueous solution is from 0.1 to 10 mol / L. If the amount of the carboxylic acid is too small, the sol becomes turbid as the hydrolysis proceeds, whereas if the amount is too large, the carboxylic acid salt starts to precipitate as the hydrolysis proceeds. Not preferred.
- Titanium tetrachloride is hydrolyzed by maintaining the aqueous solution of titanium tetrachloride at an elevated temperature.
- the holding temperature is preferably in the range of 50 ° C or higher and up to the boiling point of the titanium tetrachloride aqueous solution. If the temperature is lower than 50 ° C, the hydrolysis reaction takes a long time.
- the hydrolysis is performed by raising the temperature to the above-mentioned temperature and maintaining the temperature for about 10 minutes to 12 hours. This holding time may be shorter as the hydrolysis temperature is higher.
- Methods for hydrolyzing titanium tetrachloride at elevated temperatures include a method in which an aqueous solution of titanium tetrachloride is heated to a predetermined temperature in a reaction tank, and a method in which water in the reaction tank is heated in advance, Any of the methods of adding titanium tetrachloride and adjusting the temperature to a predetermined temperature can be adopted.
- a device 6 for heating the reactor and the reaction tank is provided. Hydrogen chloride vapor is generated by the hydrolysis reaction, but most of it is condensed with the reflux condenser 3 together with water and returned to the reaction tank 1, so that hydrogen chloride hardly escapes from the reaction tank 1. Absent.
- the generated fine titanium-containing substance can be taken out as a dry powder, but because of the ultrafine particles, the agglomeration is severe and it is difficult to obtain fine particles. It is not realistic because it becomes difficult to play.
- a dechlorination treatment When used as an aqueous sol, after the hydrolysis reaction, a dechlorination treatment can be performed if necessary. By performing the dechlorination treatment, it is easy to obtain a thin film having high photocatalytic activity and high transparency when formed.
- the dechlorination treatment may be performed by a generally known means, and for example, means such as electrodialysis, ion exchange resin, and electrolysis can be employed.
- the degree of dechlorination should be based on the pH of the sol. If the chloride ion concentration is 50 to 10 and OOO ppm, the pH is about 0.5 to 5, and the chlorine ion concentration is in a preferable range. For some 100-4, OOO ppm, the pH is about 4-1.
- the titanium-containing substances can be dispersed in a mixed medium composed of water and an organic solvent.
- the aqueous sol obtained by dechlorination of the aqueous solution generated by the hydrolysis reaction without going through a drying step is used directly as a coating liquid for forming a thin film. Preferably, it is used. It is not a preferable method to produce a powder from this aqueous sol, redisperse it in water, and use it as a sol.
- the hydrolysis product particles have a high surface activity, and the finer the particles, the higher the activity becomes, and it becomes extremely difficult to disperse the particles in water. Is inferior in transparency and the photocatalytic action is also reduced.
- a stabilizer can be added, if desired, to prevent aggregation.
- the stabilizing agent for example, various surfactants such as a conventionally used nonionic surfactant are used.
- the amount of the stabilizer added is preferably 0.1 to 1% by weight based on the weight of the aqueous solution or sol.
- the method includes the steps of suppressing escape of hydrogen chloride generated during hydrolysis of an aqueous solution of titanium tetrachloride, adding a stabilizer for preventing aggregation, and By directly dechlorinating into a sol without going through a drying step, a thin film having high photocatalytic activity and high transparency when formed into a film can be easily obtained.
- the fine particles of the titanium-containing substance having a fine average particle diameter obtained by the production method of the present invention the chemical composition and structure thereof have not been sufficiently identified.
- the particles of the titanium-containing substance are different from the conventional titanium oxide sol particles obtained by hydrolyzing titanium tetrachloride by a conventional method.
- the average particle diameter d50 of the fine titanium-containing material particles obtained by the method of the present invention is usually 0.0008 to 0.050 // m (0.8 to 50 nm), preferably Is 0.08 to 0.015 m (0.8 to 15 nm).
- the average particle diameter d50 means a particle diameter corresponding to 50% of a particle distribution curve.
- the aqueous sol or coating liquid of the titanium-containing substance of the present invention is not a white turbid state at room temperature, and maintains a colorless and transparent state even when heated to the boiling point. ing.
- a quartz cell measuring 1 O mm X 1 O mm square and 45 mm high that is, when measured at a wavelength of 450 nm to 700 nm at a thickness of 1 O mm, its light transmission
- the rate is at least 85%, preferably at least 95%.
- the amount of the titanium-containing substance in the aqueous sol of the titanium-containing substance is 0.1 to 6.5 mol liter, preferably 0.1 to 4 mol Z liter in terms of titanium concentration.
- the concentration of the titanium-containing substance is 1 to 30% by weight. If the concentration is too low, problems such as the time required for the application of the aqueous sol during the formation of a thin film occur, and the film formation cost increases. Conversely, if the concentration is too high, the particles aggregate and the sol becomes unstable. It is difficult to produce titanium with a concentration of more than 6.5 mol liter.
- a water-soluble polymer can be added to the aqueous sol or coating liquid of the titanium-containing substance obtained by the production method of the present invention, if necessary.
- Aqueous solution added to aqueous solution or coating solution of titanium-containing substance Preferred specific examples of the hydrophilic polymer include polyvinyl alcohol, methylcellulose, ethylcellulose, and nitrocellulose.
- the water-soluble polymer must be completely dissolved in the aqueous sol.
- the amount of the water-soluble polymer added to the aqueous sol is desirably 10% by weight or less.
- the timing of adding the water-soluble polymer is preferably after the completion of the dechlorination treatment, but there is no problem even before the dechlorination treatment.
- the reaction tank is configured as a continuous tank, and while the titanium tetrachloride is continuously added from the input port, the reaction solution is supplied from the output port on the opposite side of the input port. It is also possible to adopt a continuous method in which take-out and bow I are followed by dechlorination.
- An aqueous sol or coating liquid of a titanium-containing substance can be applied to the surface of a base material such as various materials and molded articles to form a thin film, and the type of the base material is not particularly limited. Specific examples of the base material include ceramics, metal, plastic, wood, paper, and the like.
- a catalyst carrier made of alumina, zirconia, or the like may be used as a base material, and a thin film may be formed on the catalyst carrier to be used as a thin-film supported catalyst.
- a thin film is formed on the glass of a lighting fixture such as a fluorescent lamp or its plastic cover, etc., it is possible to decompose organic substances such as oil fumes and prevent stains on the glass and power base. It is effective to do.
- a thin film is formed on architectural glass or wall material, it will be possible to prevent dirt similarly.
- a method of dipping the substrate in the sol, a method of spraying the sol on the substrate, and a method of brushing the sol with a brush For example, a method of applying to a material is adopted.
- the coating amount of the aqueous sol is suitably from 0.11 to 0.2 mm in liquid thickness. If the solvent is removed by drying after coating, the desired thin film can be obtained, and can be used as it is for a catalyst or the like.
- Substrates When made of heat-resistant materials such as S-metals and ceramics, for example, glass, it can be fired after forming a thin film, whereby the thin film adheres more strongly to the substrate and the hardness of the thin film increases.
- the firing temperature is preferably 200 ° C. or higher.
- the upper limit of the firing temperature is not particularly limited, and may be determined according to the heat resistance of the base material. However, if the temperature is too high, the hardness of the thin film / the adhesion to the base material does not increase, so that the temperature is 80%. A temperature of up to 0 ° C is appropriate.
- the firing atmosphere is not particularly limited, and may be in the air.
- the firing time is not particularly limited, and may be, for example, in the range of 1 to 60 minutes.
- the thickness of the thin film obtained by firing is about 0.02 to 1.0 zm in the case of the above-mentioned coating amount.
- aqueous solution 300 g was charged into a reactor equipped with a reflux condenser as shown in Fig. 1, and 38.4 g of citric acid was dissolved while maintaining the stirring speed at about 200 rpm.
- the aqueous solution was heated to a temperature of about 100 ° C., and maintained in this state for 60 minutes to complete the hydrolysis reaction. After cooling, the residual chlorine generated by the reaction was removed by electrodialysis to a chlorine concentration of 600 ppm, and the pH was adjusted to 2. Then, a water-soluble polymer, polyvinyl alcohol, was used as a film-forming aid at a concentration of 1.0% by weight.
- a titanium-containing coating solution was prepared.
- this coating solution was used to measure the transmission spectrum in the wavelength range of 200 nm to 700 nm using a spectrophotometer (JASCO Ubest 300).
- Figure 2 shows the measurement results. As is evident from Fig. 2, the absorbance is low in the visible light range from 380 nm to 700 nm, almost completely transparent, and the light transmittance is 450% from 450 to 700 nm. At a wavelength of 380 nm or less, which is ultraviolet light, a characteristic ultraviolet absorption observed in the case of titanium oxide was observed.
- the coating liquid containing the titanium-containing substance was very stable, and no sedimentation of the generated fine particles was observed even after one week.
- the particles were taken out using a vacuum dryer at 60 ° C. and subjected to electron beam diffraction with a transmission electron microscope, but could not be identified as a compound.
- the dried product was amorphous in X-ray diffraction, and the rutile type titanium oxide peak was observed in the product baked at 400 ° C.
- FIG. 3 shows the transmission spectrum in the wavelength range of 200 nm to 700 nm.
- the thin film showed a transmittance of 97% or more in the visible region, and was almost completely transparent. Furthermore, absorption similar to that specific to titanium oxide was observed in the ultraviolet.
- a red ink containing an organic dye was uniformly applied onto the transparent thin film, and an ultraviolet irradiation lamp (black light) was irradiated for 1 hour on the transparent thin film to perform a fading test.
- the fading was examined by comparing the absorptance (%) at 550 nm, the central wavelength of red before and after fading. Table 1 shows the results. As is clear from Table 1, red fading was observed, and photocatalytic ability by ultraviolet absorption was confirmed.
- a titanium-containing coating liquid (aqueous sol of a titanium-containing substance) was prepared in the same manner as in Example 1 except that the amount of cunic acid added was changed to 153.6 g.
- the transmission spectrum of this sol-like aqueous liquid was measured, the absorbance was low and almost completely transparent in the visible light region. In the ultraviolet, absorption similar to titanium oxide was observed.
- the average particle size d50 was 4.14 nm.
- the sol-like liquid was uniformly applied to a glass substrate using a spin coater, and dried with a dryer at 100 ° C. to obtain a transparent thin film. Further, it was baked at 400 ° C. for 30 minutes in an air atmosphere in an electric furnace to adhere to a glass substrate.
- the transmission spectrum of the glass substrate with the thin film was measured, the transmittance was 95% or more in the visible region, and the glass substrate was almost completely transparent.
- absorption similar to that specific to titanium oxide was observed in the ultraviolet.
- a titanium-containing coating liquid (aqueous sol of a titanium-containing substance) was prepared in the same manner as in Example 1, except that 60 g of tartaric acid was added instead of citrate.
- the absorbance of the sol was the same as in Example 1.
- the average particle diameter d50 is 3.5 nm Was.
- Example 1 shows the results of the photocatalytic ability test (red ink fading test) performed in the same manner as in Example 1.
- the transparent sol prepared in Example 1 was applied to a coated steel sheet and sintered at 400 ° C. for 15 minutes to form a titanium oxide transparent film.
- the pencil hardness of this coating film was 5H, and the result of the Goban peel test was 90 to 100.
- the concentration of titanium tetrachloride in the titanium tetrachloride aqueous solution was 0.25 mol Z liter in terms of titanium, and the addition ratios of citric acid were 0.01, 1.0 and 10 (concentration ratio of citric acid, titanium conversion concentration, As a molar ratio, three kinds of titanium-containing substances were prepared. Other conditions and operations were the same as in Example 1.
- the average particle diameter d50 of the obtained three titanium-containing substances was 1.10 nm, 4.4 nm, and 12.5 nm, respectively.
- Example 2 The same operation as in Example 1 was performed, except that cunic acid was not added. Although it remained transparent for about 5 minutes after the addition of titanium tetrachloride, it gradually became cloudy as the temperature of the solution increased to about 60 ° C or more, and became almost white at about 90 ° C or more. When the particle size distribution was measured, the average particle size d50 of the particles was 65 nm. A photocatalytic activity test (red ink discoloration test) was attempted in the same manner as in Example 1, but the measurement was not possible because the film became cloudy.
- a photocatalytic activity test red ink discoloration test
- the particles were dispersed in water using an ultrasonic disperser so that the titanium oxide concentration was 2% by weight.
- hydrochloric acid was added as a deflocculant to form PHI, and a titanium oxide sol was obtained.
- the average particle diameter d50 of the particles was 35 nm, but the sol was white.
- the results of the photocatalytic activity test (red ink discoloration test) performed in the same manner as in Example 1 are shown in Table 1. You.
- titanium tetrachloride is hydrolyzed in an aqueous solution in the presence of a carboxylic acid to give an unprecedented fine particle having a size of 2 to 5 nm.
- a titanium-containing substance or a titanium-containing coating liquid (sol) containing the same can be produced.
- the resulting particles maintain excellent catalytic activity due to their fineness, and have unprecedented transparency.In other words, even when heated to the boiling point, the particles have a thickness of 450 nm to 700 nm and a thickness of 1 nm.
- the light transmittance at 0 mm is 85% or more.
- the aqueous sol obtained by the present invention is highly transparent to visible light, and that the thin film produced using this sol exhibits high photocatalytic activity and high transparency, On the other hand, it is based on the fact that the particles are so fine that they do not cause light scattering 'absorption, and that the particles in a dispersed state have no aggregation and exist as endless primary particles.
- the titanium-containing substance or the titanium-containing coating liquid (sol) of the present invention also has a high photocatalytic effect and an ultraviolet absorbing function, it is also useful as a highly transparent photocatalytic effect material and an ultraviolet shielding and protecting material.
- the titanium-containing substance or the titanium-containing coating liquid (sol) of the present invention is used as a table of various materials such as ceramics, metals, plastics, wood, paper, and base materials such as molded articles. It is used as a material for forming a thin film having the above properties by being applied to a surface.
- a catalyst carrier made of alumina, zirconia, or the like may be used as a base material, and a thin film may be formed on the catalyst carrier to be used as a thin-film supported catalyst.
- a thin film is formed on the glass of a lighting device such as a fluorescent lamp or its plastic cover as a base material, it becomes a transparent and powerful photocatalytic thin film, so that light is not blocked.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002343085A CA2343085C (en) | 1998-08-19 | 1999-05-24 | Titanium-containing finely divided particulate material, aqueous sol composition and coating liquid containing same, process for producing same, and shaped article having film thereof |
| US09/763,172 US6610135B1 (en) | 1998-08-19 | 1999-05-24 | Titanium-containing finely divided particulate material, aqueous sol composition and coating liquid containing same, process for producing same, and shaped article having film thereof |
| EP99919667A EP1127844B1 (en) | 1998-08-19 | 1999-05-24 | Finely particulate titanium-containing substance, coating fluid containing the same, processes for producing these, and molded article having thin film comprising the substance |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10233011A JPH11171544A (ja) | 1997-08-20 | 1998-08-19 | チタン含有物質およびその製造方法 |
| JP10/233011 | 1998-08-19 | ||
| US13514099P | 1999-05-20 | 1999-05-20 | |
| US60/135,140 | 1999-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000010921A1 true WO2000010921A1 (en) | 2000-03-02 |
Family
ID=26530793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1999/002712 Ceased WO2000010921A1 (en) | 1998-08-19 | 1999-05-24 | Finely particulate titanium-containing substance, coating fluid containing the same, processes for producing these, and molded article having thin film comprising the substance |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6610135B1 (ja) |
| EP (1) | EP1127844B1 (ja) |
| KR (1) | KR100630285B1 (ja) |
| CA (1) | CA2343085C (ja) |
| WO (1) | WO2000010921A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1375602A1 (en) * | 2002-06-25 | 2004-01-02 | Sumitomo Chemical Company, Limited | Titanium oxide dispersion composition, and method and container for preserving the same |
| US6884753B2 (en) | 2002-05-27 | 2005-04-26 | Sumitomo Chemical Company, Limited | Method for producing ceramic dispersion composition |
| US7045005B2 (en) | 2001-07-19 | 2006-05-16 | Sumitomo Chemical Company, Limited | Ceramics dispersion liquid, method for producing the same, and hydrophilic coating agent using the same |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340711B1 (en) * | 1996-08-30 | 2002-01-22 | Showa Denko K.K. | Particles aqueous dispersion and film of titanium oxide and preparation thereof |
| JP2004196626A (ja) | 2002-12-20 | 2004-07-15 | Sumitomo Chem Co Ltd | 酸化チタンの製造方法 |
| KR100514107B1 (ko) * | 2003-03-05 | 2005-09-09 | 한국화학연구원 | 마이크로파를 이용한 나노크기 지르코니아 수화물 졸의연속 제조방법 |
| KR100544628B1 (ko) * | 2003-03-07 | 2006-01-23 | 한국화학연구원 | 지르코니아 수화물 나노입자 졸의 연속 제조방법 |
| US7118727B2 (en) * | 2003-06-16 | 2006-10-10 | General Electric Company | Method of making oxide particles |
| US7241500B2 (en) * | 2003-10-06 | 2007-07-10 | Certainteed Corporation | Colored roofing granules with increased solar heat reflectance, solar heat-reflective shingles, and process for producing same |
| DE102004037118A1 (de) * | 2004-07-30 | 2006-03-23 | Degussa Ag | Titandioxid enthaltende Dispersion |
| JP4495162B2 (ja) * | 2004-08-26 | 2010-06-30 | 三井化学株式会社 | ルチル型酸化チタン超微粒子 |
| FR2884111B1 (fr) | 2005-04-07 | 2007-05-18 | Saint Gobain Mat Constr Sas | Granule biocide, notamment pour la fabrication de bardeau d'asphalte |
| EP1879833A4 (en) * | 2005-05-02 | 2009-09-30 | Symyx Technologies Inc | METAL OR METAL OXIDE MATERIALS WITH A HIGH ACTIVE SURFACE AND METHODS OF MAKING SAME |
| US9044921B2 (en) | 2005-09-07 | 2015-06-02 | Certainteed Corporation | Solar heat reflective roofing membrane and process for making the same |
| CZ300800B6 (cs) * | 2006-04-27 | 2009-08-12 | Rokospol, A. S. | Zpusob výroby transparentních fotokatalyticky aktivních cástic oxidu titanicitého |
| US7749593B2 (en) * | 2006-07-07 | 2010-07-06 | Certainteed Corporation | Solar heat responsive exterior surface covering |
| DE102006057903A1 (de) * | 2006-12-08 | 2008-06-12 | Evonik Degussa Gmbh | Titandioxid enthaltende Dispersion |
| US7632332B2 (en) | 2006-12-12 | 2009-12-15 | Honda Motor Co., Ltd. | Preparation of iron-titanium nanoparticles |
| US8361597B2 (en) * | 2007-04-02 | 2013-01-29 | Certainteed Corporation | Solar heat-reflective roofing granules, solar heat-reflective shingles, and process for producing same |
| US20080261007A1 (en) | 2007-04-19 | 2008-10-23 | Hong Keith C | Post-functionalized roofing granules, and process for preparing same |
| CA2688340C (en) * | 2007-05-24 | 2016-02-09 | Certainteed Corporation | Roofing granules with high solar reflectance, roofing products with high solar reflectance, and processes for preparing same |
| US8491985B2 (en) * | 2008-03-31 | 2013-07-23 | Certainteed Corporation | Coating compositions for roofing granules, dark colored roofing granules with increased solar heat reflectance, solar heat-reflective shingles, and process for producing the same |
| US8394498B2 (en) | 2008-12-16 | 2013-03-12 | Certainteed Corporation | Roofing granules with high solar reflectance, roofing materials with high solar reflectance, and the process of making the same |
| US8637116B2 (en) * | 2009-08-20 | 2014-01-28 | Certainteed Corporation | Process for preparing roofing granules comprising organic colorant, with improved luster, and roofing products including such granules |
| US9540822B2 (en) | 2009-11-24 | 2017-01-10 | Certainteed Corporation | Composite nanoparticles for roofing granules, roofing shingles containing such granules, and process for producing same |
| US20110223385A1 (en) * | 2010-03-15 | 2011-09-15 | Ming Liang Shiao | Roofing granules with high solar reflectance, roofing products with high solar reflectance, and process for preparing same |
| US8673427B2 (en) | 2011-08-18 | 2014-03-18 | Certainteed Corporation | System, method and apparatus for increasing average reflectance of a roofing product for sloped roof |
| US10730799B2 (en) | 2016-12-31 | 2020-08-04 | Certainteed Corporation | Solar reflective composite granules and method of making solar reflective composite granules |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61283629A (ja) * | 1985-06-10 | 1986-12-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | プラスチツク複合材料 |
| EP0335773A1 (fr) | 1988-03-30 | 1989-10-04 | Rhone-Poulenc Chimie | Procédé de préparation d'oxyde de titane |
| JPH0214820A (ja) | 1988-03-23 | 1990-01-18 | Fuji Titan Kogyo Kk | 酸化チタン薄膜形成材料の製造方法 |
| US4923682A (en) | 1989-03-30 | 1990-05-08 | Kemira, Inc. | Preparation of pure titanium dioxide with anatase crystal structure from titanium oxychloride solution |
| JPH02196029A (ja) | 1989-01-25 | 1990-08-02 | Sanyo Shikiso Kk | 多孔質性酸化チタン微粒子及びその製造法 |
| JPH06234525A (ja) * | 1993-02-10 | 1994-08-23 | Tioxide Specialties Ltd | 二酸化チタンの製造法 |
| JPH0967125A (ja) * | 1995-08-30 | 1997-03-11 | Showa Denko Kk | 酸化チタン微粉末及びその製造法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861946A (en) * | 1972-07-21 | 1975-01-21 | Mearl Corp | Titanium dioxide nacreous pigments and process for the preparation thereof |
| GB8712752D0 (en) * | 1987-05-30 | 1987-07-01 | Tioxide Group Plc | Particulate material |
| BE1001780A4 (fr) * | 1988-06-13 | 1990-03-06 | Solvay | Procede pour la fabrication de cristaux de titanate de baryum et/ou de strontium et cristaux de titanate de baryum et/ou de strontium. |
| EP0376216B1 (en) * | 1988-12-28 | 1994-11-30 | Ishihara Sangyo Kaisha, Ltd. | Titanium dioxide aggregates, process for producing same and electrophotographic photosensitive material containing same |
| AU675000B2 (en) * | 1993-10-22 | 1997-01-16 | Ishihara Sangyo Kaisha Ltd. | Dendrite or asteroidal titanium dioxide micro-particles and process for producing the same |
| US5837050A (en) * | 1995-08-11 | 1998-11-17 | Ishihara Sangyo Kaisha, Ltd. | Ultrafine iron-containing rutile titanium oxide and process for producing the same |
| WO1997015526A1 (en) * | 1995-10-27 | 1997-05-01 | E.I. Du Pont De Nemours And Company | Hydrothermal process for making ultrafine metal oxide powders |
| DE19543204C2 (de) * | 1995-11-20 | 1997-09-18 | Bayer Ag | Verfahren zur Herstellung von nanodispersem Titandioxid und seine Verwendung |
| US5824145A (en) * | 1997-05-14 | 1998-10-20 | E. I. Du Pont De Nemours And Company | Method for making a photodurable aqueous titanium dioxide pigment slurry |
| US5981425A (en) * | 1998-04-14 | 1999-11-09 | Agency Of Industrial Science & Tech. | Photocatalyst-containing coating composition |
-
1999
- 1999-05-24 CA CA002343085A patent/CA2343085C/en not_active Expired - Fee Related
- 1999-05-24 US US09/763,172 patent/US6610135B1/en not_active Expired - Fee Related
- 1999-05-24 KR KR1020017001978A patent/KR100630285B1/ko not_active Expired - Fee Related
- 1999-05-24 EP EP99919667A patent/EP1127844B1/en not_active Expired - Lifetime
- 1999-05-24 WO PCT/JP1999/002712 patent/WO2000010921A1/ja not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61283629A (ja) * | 1985-06-10 | 1986-12-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | プラスチツク複合材料 |
| JPH0214820A (ja) | 1988-03-23 | 1990-01-18 | Fuji Titan Kogyo Kk | 酸化チタン薄膜形成材料の製造方法 |
| EP0335773A1 (fr) | 1988-03-30 | 1989-10-04 | Rhone-Poulenc Chimie | Procédé de préparation d'oxyde de titane |
| JPH0222127A (ja) * | 1988-03-30 | 1990-01-25 | Rhone Poulenc Chim | 酸化チタンの製造法 |
| JPH02196029A (ja) | 1989-01-25 | 1990-08-02 | Sanyo Shikiso Kk | 多孔質性酸化チタン微粒子及びその製造法 |
| US4923682A (en) | 1989-03-30 | 1990-05-08 | Kemira, Inc. | Preparation of pure titanium dioxide with anatase crystal structure from titanium oxychloride solution |
| JPH06234525A (ja) * | 1993-02-10 | 1994-08-23 | Tioxide Specialties Ltd | 二酸化チタンの製造法 |
| JPH0967125A (ja) * | 1995-08-30 | 1997-03-11 | Showa Denko Kk | 酸化チタン微粉末及びその製造法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1127844A4 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7045005B2 (en) | 2001-07-19 | 2006-05-16 | Sumitomo Chemical Company, Limited | Ceramics dispersion liquid, method for producing the same, and hydrophilic coating agent using the same |
| US6884753B2 (en) | 2002-05-27 | 2005-04-26 | Sumitomo Chemical Company, Limited | Method for producing ceramic dispersion composition |
| EP1375602A1 (en) * | 2002-06-25 | 2004-01-02 | Sumitomo Chemical Company, Limited | Titanium oxide dispersion composition, and method and container for preserving the same |
| US6974611B2 (en) | 2002-06-25 | 2005-12-13 | Sumitomo Chemical Company, Limited | Titanium oxide dispersion composition, and method and container for preserving the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2343085A1 (en) | 2000-03-02 |
| CA2343085C (en) | 2005-07-05 |
| EP1127844A4 (en) | 2008-04-09 |
| KR100630285B1 (ko) | 2006-09-29 |
| EP1127844A1 (en) | 2001-08-29 |
| US6610135B1 (en) | 2003-08-26 |
| EP1127844B1 (en) | 2012-08-01 |
| KR20010074835A (ko) | 2001-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2000010921A1 (en) | Finely particulate titanium-containing substance, coating fluid containing the same, processes for producing these, and molded article having thin film comprising the substance | |
| JP4335446B2 (ja) | 酸化チタンゾル、薄膜およびそれらの製造法 | |
| EP0826633B1 (en) | Particles, aqueous dispersion and film of titanium oxide, and preparation thereof | |
| Matsuda et al. | Transparent anatase nanocomposite films by the sol–gel process at low temperatures | |
| JP3524342B2 (ja) | 薄膜形成用二酸化チタンゾル及び薄膜 | |
| US6479141B1 (en) | Photocatalytic coating composition and product having photocatalytic thin film | |
| JPWO1999058451A1 (ja) | 酸化チタンゾル、薄膜およびそれらの製造法 | |
| JP4619601B2 (ja) | 光触媒性コーティング組成物および光触媒性薄膜を有する製品 | |
| EP1689525B1 (en) | Transparent film-forming composition | |
| JPH11171544A (ja) | チタン含有物質およびその製造方法 | |
| CN1168663C (zh) | 含钛的细微颗粒物质,水溶胶组合物,含该物质的涂料液,该涂料液的制造方法及有该物质膜的成型制品 | |
| JP4187632B2 (ja) | 二酸化チタン薄膜の形成方法およびその二酸化チタン薄膜を有する触媒等 | |
| JP2001058825A (ja) | 無機膜形成用塗布剤、その製造方法及びその無機膜形成方法 | |
| JP4010934B2 (ja) | 酸化チタン粒子、その水分散ゾル、薄膜及びそれらの製造法 | |
| JP3726366B2 (ja) | 蛍光ランプ | |
| JP2000344522A (ja) | 酸化チタン膜の作製方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 99812370.6 Country of ref document: CN |
|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA CN KR US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 1020017001978 Country of ref document: KR |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 09763172 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1999919667 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 2343085 Country of ref document: CA Ref document number: 2343085 Country of ref document: CA Kind code of ref document: A |
|
| WWP | Wipo information: published in national office |
Ref document number: 1020017001978 Country of ref document: KR |
|
| WWP | Wipo information: published in national office |
Ref document number: 1999919667 Country of ref document: EP |
|
| WWG | Wipo information: grant in national office |
Ref document number: 1020017001978 Country of ref document: KR |