WO2022249730A1 - フッ化物粒子の分散液、光学膜形成用組成物及び光学膜 - Google Patents
フッ化物粒子の分散液、光学膜形成用組成物及び光学膜 Download PDFInfo
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- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
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- G—PHYSICS
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Definitions
- the present invention relates to a dispersion of fluoride particles, a composition for forming an optical film, and an optical film, and more particularly, a dispersion of fluoride particles and a composition for forming an optical film, which are suitable for antireflection films such as displays and lenses. related to objects and optical films.
- a coating for preventing light reflection includes a high refractive index layer and a low refractive index layer.
- the antireflection coating prevents light reflection on the display surface by utilizing the phase difference of the light reflected on the surface of each of the high refractive index layer and the low refractive index layer, thereby improving visibility. are improving.
- the method of forming the low refractive index layer is roughly classified into a vapor phase method and a coating method.
- the coating method is superior to the vapor phase method in terms of high utilization efficiency of raw materials and mass production and facility costs. Therefore, at present, a coating method with good productivity is used to form the low refractive index layer.
- Patent Document 1 describes that magnesium fluoride sol and magnesium fluoride fine powder that are chemically stable and have a low refractive index are effective as a filler for a coating agent for forming a low refractive index layer. It is however, the refractive index of magnesium fluoride is approximately 1.38, and the refractive index of the low refractive index layer cannot be made lower than that.
- Patent Document 2 describes a dispersion of hollow spherical silica-based fine particles.
- Patent Document 3 describes a dispersion liquid in which hollow particles having a hollow core inside a shell made of magnesium fluoride (core-shell particles) are dispersed.
- core-shell particles magnesium fluoride
- These patent documents describe that an antireflection film having a lower refractive index can be formed by using silica-based fine particles or hollow particles as a filler of a coating agent.
- the silica-based fine particles of Patent Document 2 and the hollow particles of Patent Document 3 themselves have voids. Therefore, an antireflection film using these fillers has a problem that its mechanical strength and scratch resistance are lowered.
- Patent Document 4 describes that hollow particles made of a fluoroaluminate compound, which have a lower refractive index than magnesium fluoride, are suitable as an inorganic filler for the low refractive index layer of the antireflection film.
- the hollow particles of Patent Document 4 themselves have voids, and therefore have the problem of reduced mechanical strength and scratch resistance.
- the example of Patent Document 4 describes an antireflection film using hollow particles made of a fluoroaluminate compound, the optical performance thereof is unknown.
- Patent Document 5 it is possible to form a low-reflection film using ultrafine particles of sodium hexafluoroaluminate (also known as cryolite (refractive index: 1.33)), which has a lower refractive index than magnesium fluoride.
- ultrafine particles of sodium hexafluoroaluminate also known as cryolite (refractive index: 1.33)
- cryolite reffractive index: 1.33
- the low-reflection film disclosed in Patent Document 5 does not use a binder resin.
- Patent Document 5 does not describe haze, which is one of the important optical characteristics of the low-reflection film.
- the present invention has been made in view of the above-mentioned problems, and its object is to provide excellent dispersibility and is suitable for the production of optical films such as antireflection films.
- An object of the present invention is to provide a dispersion of fluoride particles, a composition for forming an optical film, and an optical film using the same.
- the dispersion of fluoride particles of the present invention comprises fluoride particles, an anionic surfactant as a dispersant for the fluoride particles, and an organic solvent.
- the particles are characterized in that they contain at least aluminum and an alkali metal, and an alkaline earth metal as an optional element in their composition, and are dispersed in the organic solvent.
- the counter ion of the hydrophilic group in the anionic surfactant is preferably proton or onium ion.
- the anionic surfactant is at least one of an anionic hydrocarbon surfactant represented by the following chemical formula (1) and an anionic fluorocarbon surfactant.
- RXM (1) R in the formula is an alkyl group having 2 to 18 carbon atoms, an aryl group having 2 to 18 carbon atoms, a polyoxyalkylene alkyl ether group having 2 to 18 carbon atoms, and a range of 2 to 18 carbon atoms, an alkyl group in which at least one hydrogen atom is substituted with a fluorine atom, an aryl group in which the number of carbon atoms is in the range of 2 to 18 and in which at least one hydrogen atom is substituted with a fluorine atom, or a carbon number of 2 to 18 and represents a polyoxyalkylene alkyl ether group in which at least one hydrogen atom is substituted with a fluorine atom, X is -COO - , -PO 4 - , -SO 3
- the content of the anionic surfactant is preferably within the range of 0.2% by mass to 8% by mass with respect to 100% by mass of the fluoride particles.
- the fluoride particles include Na3AlF6 , Na5Al3F14 , Na3Li3Al2F12 , Na2MgAlF7 , K2NaAlF6 , LiCaAlF6 and LiSrAlF6 .
- the water concentration in the dispersion liquid of the fluoride particles is 1.5% by mass or less with respect to 100% by mass of the dispersion liquid of the fluoride particles.
- the organic solvent is preferably at least one of an alcohol solvent, a ketone solvent and an ether solvent.
- the average dispersed particle size of the fluoride particles is within the range of 1 nm to 100 nm.
- the content of the fluoride particles is preferably in the range of 1% by mass to 30% by mass with respect to 100% by mass of the dispersion liquid of the fluoride particles.
- the Rsp value of the fluoride particle dispersion measured using pulse NMR is 5 or more.
- the composition for forming an optical film of the present invention is characterized by containing the dispersion liquid of the fluoride particles.
- the optical film of the present invention is characterized by comprising a cured film of the composition for forming an optical film.
- an anionic surfactant as a dispersant for fluoride particles containing at least aluminum and an alkali metal in the composition, a dispersion of fluoride particles having excellent dispersibility and an optical dispersion containing the same A film-forming composition can be provided.
- fluoride particles have a smaller refractive index than, for example, magnesium fluoride
- the dispersion of fluoride particles of the present invention and the composition for forming an optical film containing the same can be used in the production of optical films such as antireflection films.
- an optical film such as an antireflection film having uniform and excellent optical properties such as haze and light reflectance in the plane can be provided. be able to.
- the dispersion liquid of the present embodiment contains at least fluoride particles, an anionic surfactant as a dispersant, and an organic solvent.
- the fluoride particles are present in a dispersed state in the organic solvent.
- dispersion refers to a state in which dispersoids are dispersed in a liquid dispersion medium. Therefore, the term “dispersion liquid” does not include dispersions such as solid colloids (organogels) in which dispersoids are dispersed in a solid dispersion medium and fluidity is lost.
- dispersions such as solid colloids (organogels) in which dispersoids are dispersed in a solid dispersion medium and fluidity is lost.
- the fluoride in the fluoride particles contains at least aluminum and an alkali metal in its composition.
- the fluoride may also contain an alkaline earth metal as an optional element in its composition.
- the alkali metal is not particularly limited, and examples include lithium, sodium, and potassium. Moreover, the alkaline earth metal is not particularly limited, and examples thereof include magnesium, calcium, strontium, and the like.
- fluoride examples include Na 3 AlF 6 (refractive index: 1.33), Na 5 Al 3 F 14 (refractive index: 1.33), Na 3 Li 3 Al 2 F 12 (refractive index: index: 1.34), Na2MgAlF7 (refractive index: 1.35), K2NaAlF6 (refractive index: 1.38 ) , LiCaAlF6 (refractive index: 1.38), LiSrAlF6 ( refractive index: 1.38) and the like.
- These fluoride particles can be used singly or in combination of two or more.
- Na 3 AlF 6 having a refractive index of less than 1.34 and a low solubility in water is particularly preferable.
- the content of the fluoride particles is preferably in the range of 1% by mass to 30% by mass, more preferably in the range of 2% by mass to 15% by mass, with respect to 100% by mass of the dispersion of fluoride particles. More preferably, the range is from 10% by mass to 10% by mass.
- the average dispersed particle diameter (d50) of the fluoride particles is preferably in the range of 1 nm to 100 nm, more preferably in the range of 10 nm to 50 nm.
- the average dispersed particle diameter is preferably in the range of 1 nm to 100 nm, more preferably in the range of 10 nm to 50 nm.
- the anionic surfactant functions as a dispersant that imparts good dispersibility to the fluoride particles.
- examples of the anionic surfactant include anionic hydrocarbon surfactants and anionic fluorocarbon surfactants.
- anionic surfactants the refractive index of the anionic fluorocarbon surfactant is lower than that of the anionic hydrocarbon surfactant. Therefore, when a dispersion containing the anionic fluorocarbon surfactant is used, It is suitable as a constituent material for optical films.
- an anionic hydrocarbon surfactant and an anionic fluorocarbon surfactant may be used in combination.
- anionic hydrocarbon surfactant as used herein means one or two or more hydrocarbon moieties in the molecule and one or two or more anionic groups (hydrophilic moieties). It is meant to include surfactants containing.
- anionic fluorocarbon surfactant means one or more hydrocarbon moieties in the molecule, wherein at least one hydrogen atom is substituted with a fluorine atom; It is meant to include surfactants containing one or more anionic groups.
- the anionic surfactant of this embodiment can be represented by the following chemical formula (1).
- R in the chemical formula (1) is a hydrocarbon moiety, an alkyl group having 2 to 18 carbon atoms, preferably 5 to 15 carbon atoms, more preferably 10 to 14 carbon atoms; is an aryl group having 5 to 15 carbon atoms, more preferably 10 to 14 carbon atoms; a polyoxyalkylene alkyl ether group having 2 to 18 carbon atoms, preferably 5 to 15 carbon atoms, more preferably 10 to 14 carbon atoms; an alkyl group having 2 to 18 carbon atoms, preferably 2 to 10 carbon atoms, more preferably 4 to 6 carbon atoms, in which at least one hydrogen atom is substituted with a fluorine atom; , an aryl group preferably having 5 to 15 carbon atoms, more preferably 8 to 12 carbon atoms, in which at least one hydrogen atom is substituted with a fluorine atom; It represents a polyoxyalkylene alkyl ether group having 5 to 15 carbon atoms, more preferably 8 to 12 carbon
- R may be either a straight chain or a branched chain.
- the range means to include all integer carbon numbers included in the range. Therefore, for example, an alkyl group having 1 to 3 carbon atoms means all alkyl groups having 1, 2 and 3 carbon atoms.
- X and M in the chemical formula (1) represent anionic groups (hydrophilic groups).
- the aforementioned X represents -COO - , -PO 4 - , -SO 3 - or -SO 4 - .
- M represents a counter ion of a hydrophilic group, and is preferably proton (H + ) or onium ion in the present embodiment. These counter ions can improve the solubility and dispersibility of the fluoride particles in organic solvents.
- the onium ion is preferably represented by the following chemical formula (2). H + .
- R 1 , R 2 and R 3 in the chemical formula (2) are each independently hydrogen, C 1-8, preferably C 1-5, more preferably C 1-3 an alkyl group; an aryl group having 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms, more preferably 1 to 3 carbon atoms; and an aryl group having 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms, more preferably 1 carbon atom represents any of the hydroxyalkyl groups from 1 to 3;
- the alkyl group, aryl group and hydroxyalkyl group for R 1 , R 2 and R 3 may be linear or branched.
- the onium ions include, for example, ammonium ions, methylammonium ions, trimethylammonium ions, ethylammonium ions, dimethylammonium ions, triethanolammonium ions, and the like.
- ammonium ions are particularly preferred from the viewpoint of the solubility of the fluoride particles in organic solvents.
- anionic hydrocarbon surfactant examples include heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, and ammonium salts thereof; heptanesulfonic acid, octanesulfonic acid, decanesulfonic acid, laurylsulfonic acid, and ammonium salts thereof; laurylbenzenesulfonic acid and ammonium salts thereof; heptyl sulfate, octyl sulfate, decyl sulfate, lauryl sulfate and ammonium salts thereof; octyl phosphate, decyl phosphate, lauryl phosphate and ammonium salts thereof polyoxyethylene lauryl ether sulfuric acid and its ammonium salt; polyoxyethylene lauryl ether sulfonic acid and its ammonium salt; polyoxyethylene tridecyl ether phosphate, polyoxyethylene lauryl ether
- the exemplified anionic hydrocarbon surfactants can be used singly or in combination of two or more.
- laurylbenzenesulfonic acid is preferable from the viewpoint of the dispersibility of fluoride particles in organic solvents.
- the exemplified anionic hydrocarbon surfactants can be used in any combination with any of the exemplified fluoride particles as well as the Na 3 AlF 6 particles described above.
- Neoperex registered trademark
- Neoperex G-25 Neoperex G-25
- Neoperex G-65 Neoperex G-65
- Neoperex GS all trade names, manufactured by Kao Corporation.
- Solsperse (registered trademark) 3000, Solsperse 21000, Solsperse 26000, Solsperse 36600, Solsperse 41000 (all trade names, manufactured by Nippon Lubrizol Co., Ltd.); DISPERBYK (registered trademark)-108, DISPERBYK-110, DISPERBYK-111 , DISPERBYK-112, DISPERBYK-116, DISPERBYK-142, DISPERBYK-145, DISPERBYK-180, DISPERBYK-2000, DISPERBYK-2001 (all trade names, manufactured by BYK Chemie Co., Ltd.); Surf A208F, Plysurf A208B, Plysurf A219B, Plysurf AL, Plysurf A212C, Plysurf A215C (all trade names, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.); PA111 (trade name, manufactured by Ajino
- anionic fluorocarbon surfactants include 3H-tetrafluoropropionic acid, 5H-octafluoropentanoic acid, 7H-dodecafluoroheptanoic acid, and 9H-hexadecafluorononanoic acid.
- the exemplified anionic fluorocarbon surfactants can be used singly or in combination of two or more.
- 7H-dodecafluoroheptanoic acid is preferred from the viewpoint of the dispersibility of fluoride particles in organic solvents.
- the exemplified anionic fluorocarbon surfactants can be used in any combination with any of the exemplified fluoride particles as well as the Na 3 AlF 6 particles described above.
- the content of the anionic surfactant is preferably in the range of 0.2% by mass to 8% by mass, more preferably in the range of 1% by mass to 4% by mass, relative to 100% by mass of the fluoride particles.
- the content of the anionic surfactant is preferably in the range of 0.2% by mass to 8% by mass, more preferably in the range of 1% by mass to 4% by mass, relative to 100% by mass of the fluoride particles.
- organic solvent is not particularly limited, alcohol solvents, ketone solvents and ether solvents are preferable. These organic solvents can be used singly or in combination of two or more.
- the alcohol solvent is not particularly limited. Methoxy-1-propanol, 3-methyl-1-butanol, and the like. These alcohol solvents can be used singly or in combination of two or more.
- the ketone solvent is not particularly limited, and examples include methyl isobutyl ketone, methyl ethyl ketone, methyl butyl ketone, cyclohexanone, methylcyclohexanone, acetylacetone, and the like. These ketone solvents can be used singly or in combination of two or more.
- ether solvent examples include ethylene glycol dimethyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, tetrahydrofuran, and the like. These ether solvents can be used singly or in combination of two or more.
- the exemplified organic solvents can be used in arbitrary combinations with any of the exemplified Na 3 AlF 6 particles, the exemplified fluoride particles, and the exemplified anionic hydrocarbon surfactants described above. Further, among the exemplified organic solvents, 1-methyl-2-propanol, methyl ethyl ketone, methyl isobutyl ketone and propylene glycol monomethyl ether are preferable in the present embodiment. For example, when the dispersion of fluoride particles of the present embodiment is applied to the composition for forming an optical film, these organic solvents are superior to the acrylate solvent as a binder component contained in the composition for forming an optical film. has a dissolving surname. Moreover, since these organic solvents are highly volatile, they are suitable for producing optical films such as antireflection films.
- the water concentration in the dispersion of fluoride particles is preferably 1.5% by mass or less with respect to 100% by mass of the dispersion of fluoride particles, and preferably 1.0% by mass. It is more preferably 0.8% by mass or less, more preferably 0.8% by mass or less.
- the water concentration in the dispersion liquid of the fluoride particles is 1.5% by mass or less, the fluoride particles do not aggregate in the dispersion liquid, and the stability of the dispersion liquid can be achieved.
- the Rsp value measured using pulse NMR is preferably 5 or more, more preferably in the range of 10 to 25.
- the Rsp value can be adjusted by controlling the anionic surfactant content and/or the water concentration in the dispersion. For example, the Rsp value can be increased by increasing the content of the anionic surfactant within the range not exceeding the numerical range described above. The Rsp value can also be increased by reducing the amount of water in the dispersion. A method for measuring the Rsp value will be described later in Examples.
- the viscosity of the dispersion liquid is preferably in the range of 200 mPa ⁇ s or less from the viewpoint of improving compatibility with the binder component contained in the composition for forming an optical film.
- Method for producing fluoride particles Next, the method for producing fluoride particles according to the present embodiment will be described below using Na 3 AlF 6 particles as an example.
- the manufacturing method described below is an example, and the present invention is not limited to this manufacturing method. Moreover, the manufacturing method described below can also be applied to fluoride particles other than Na 3 AlF 6 particles.
- a method for producing Na 3 AlF 6 particles includes a step of reacting an aqueous sodium salt solution and an aqueous aluminum salt solution with a fluoride precursor to obtain a slurry of Na 3 AlF 6 particles, and solid-liquid separation and washing of the resulting slurry. and removing water from the paste of Na 3 AlF 6 particles after washing to obtain a dry solid of Na 3 AlF 6 particles.
- the sodium salt in the aqueous sodium salt solution is not particularly limited, and examples include sodium sulfate, sodium acetate, sodium nitrate, and sodium hydroxide. These sodium salts can be used individually by 1 type, or in mixture of 2 or more types, respectively.
- the aluminum salt in the aluminum salt aqueous solution is not particularly limited, and examples thereof include aluminum sulfate, aluminum acetate, aluminum nitrate, and aluminum hydroxide. These aluminum salts can be used individually by 1 type, or in mixture of 2 or more types, respectively.
- the sodium salt aqueous solution and aluminum salt aqueous solution are obtained by dissolving sodium salt or aluminum salt in water, respectively.
- the dissolution temperature for dissolving the sodium salt or aluminum salt in water can be appropriately set according to the solubility of the sodium salt or aluminum salt in water. For example, when using a sodium salt and/or an aluminum salt that exhibit sufficient solubility in water even at room temperature, the reaction may be carried out at room temperature. In addition, when using sodium salts and/or aluminum salts that have low solubility in water at room temperature, these salts are dissolved in water by heating to shorten the time required for dissolution. good too.
- the fluoride precursor is not particularly limited as long as it is a salt soluble in water.
- fluoride precursors include sodium fluoride, potassium fluoride, ammonium fluoride, quaternary ammonium fluoride, acid ammonium fluoride, and hydrogen fluoride. These fluoride precursors can be used singly or in combination of two or more.
- the reaction between the sodium salt aqueous solution and aluminum salt aqueous solution and the fluoride precursor may be carried out after filtering the sodium salt aqueous solution and aluminum salt aqueous solution for the purpose of removing foreign matter in the aqueous solution.
- the reaction between the sodium salt aqueous solution and the aluminum salt aqueous solution and the fluoride precursor can be performed by adding a solid fluoride precursor to the mixed solution containing the sodium salt aqueous solution and the aluminum salt aqueous solution.
- a solid fluoride precursor to either the sodium salt aqueous solution or the aluminum salt aqueous solution
- the sodium salt aqueous solution or the aluminum salt aqueous solution to which the fluoride precursor is not added can be mixed and reacted.
- the aqueous sodium salt solution and the aqueous aluminum salt solution may be mixed in any order or simultaneously with the aqueous fluoride precursor solution obtained by dissolving the fluoride precursor in water and reacted.
- the simplification of the production process and the facilitation of the reaction can be achieved.
- the aqueous fluoride precursor solution may be filtered in advance in order to remove foreign substances in the aqueous fluoride precursor solution.
- the reaction temperature between the sodium salt aqueous solution and the aluminum salt aqueous solution and the fluoride precursor is not particularly limited, but if the reaction temperature is too low, the progress of the reaction may be slowed down. On the other hand, if the reaction temperature is too high, vapor is generated from the sodium salt aqueous solution, aluminum salt aqueous solution and/or fluoride precursor aqueous solution, which may change the concentration of the mixed solution (reaction solution). From these viewpoints, the reaction temperature is preferably within the range of 20°C to 50°C, more preferably within the range of 23°C to 45°C, and preferably within the range of 25°C to 40°C. Especially preferred.
- the method for solid-liquid separation of the resulting slurry of Na 3 AlF 6 particles is not particularly limited, and examples thereof include suction filtration, centrifugal dehydration, and the like.
- a centrifugal separator may be used for solid-liquid separation, or the slurry itself may be evaporated to dryness.
- the paste of Na 3 AlF 6 particles obtained by solid-liquid separation can be washed with water, for example. This can remove unreacted fluoride precursors and other anions.
- the washing temperature and washing time are not particularly limited, and can be appropriately set as required.
- the heat treatment method is not particularly limited, and includes, for example, a method in which a paste of Na 3 AlF 6 particles is placed in an FRP vat and dried in a dryer.
- the heating temperature (drying temperature) in the heat treatment is preferably in the range of 100°C to 300°C, more preferably in the range of 100°C to 200°C.
- the heating temperature is set to 100° C. or higher, the water contained in the paste of Na 3 AlF 6 particles can be sufficiently removed or reduced.
- the heating temperature is set to 300° C. or lower, thermal fusion between Na 3 AlF 6 particles and grain growth of Na 3 AlF 6 particles can be suppressed.
- the heating time (drying time) in the heat treatment is not particularly limited, and can be appropriately set as necessary.
- the heat treatment may be performed in air or in an inert gas environment.
- the inert gas is not particularly limited, and examples thereof include nitrogen and argon.
- the heat treatment may be performed under a reduced pressure environment.
- Fluoride particles other than Na 3 AlF 6 particles can be produced by a known production method.
- raw materials to be used and manufacturing conditions can be appropriately set as necessary.
- the dispersion liquid of the present embodiment is obtained by mixing fluoride particles such as Na 3 AlF 6 particles obtained by the above-described production method, an anionic surfactant and an organic solvent, and dispersing the fluoride particles in the organic solvent.
- the method for producing a dispersion of fluoride particles according to the present embodiment may also include the aforementioned method for producing fluoride particles.
- the method of mixing the fluoride particles, the anionic surfactant, and the organic solvent and the order of addition are not particularly limited.
- an anionic surfactant is added to obtain a dispersion of fluoride particles of the present embodiment.
- dispersion treatment may be performed using a dispersing machine to produce the dispersion liquid of the fluoride particles of the present embodiment.
- the method for dispersing the fluoride particles in the organic solvent is not particularly limited, and examples thereof include a wet bead mill, a wet jet mill, and a method using ultrasonic waves.
- the selection of the dispersing method may be carried out in consideration of the desired quality such as the average dispersed particle size and purity of the fluoride particles, and the equipment used for pulverization.
- a wet bead mill For example, if you want to improve the dispersibility of fluoride particles, it is preferable to use a wet bead mill.
- media such as zirconia beads are used to refine the particles, so that the dispersing power of the fluoride particles can be improved.
- the resulting dispersion may be contaminated with media.
- a method using a wet jet mill is preferable.
- a wet jet mill is a wet pulverization method that does not use media, and can prevent contamination due to media such as a wet bead mill. However, since no media is used, the dispersing power of the fluoride particles may be lowered.
- the dispersion time is not particularly limited, and can be appropriately set according to the type of fluoride particles, anionic surfactant, organic solvent, and the like.
- Methods for controlling the water concentration include, for example, a method of performing wet pulverization in a dry room or other place where the dew point is controlled, or a method in which the fluoride particles, the organic solvent, and the dispersion containing these are not exposed to the outside air.
- a method of performing in an inert gas environment in a space can be mentioned.
- the inert gas is not particularly limited, and examples thereof include dry air, nitrogen, argon and the like.
- water adsorbed on the surface of the fluoride particles may be removed in advance before adding and dispersing the fluoride particles in the organic solvent. Additionally, water may be removed from the organic solvent.
- heat treatment can be performed as a method for removing surface-adsorbed water.
- the drying temperature in the heat treatment is preferably in the range of 100°C to 200°C, more preferably in the range of 110°C to 150°C.
- the drying time is preferably in the range of 2 hours to 34 hours, more preferably in the range of 5 hours to 20 hours.
- Methods for removing water from the organic solvent include, for example, distillation, centrifugation, and use of dehydrating materials (molecular sieves, zeolite, ion exchange resin, activated alumina, etc.). Alternatively, a method of bubbling an inert gas such as nitrogen into an aprotic organic solvent may be used.
- the composition for forming an optical film of the present embodiment contains at least a dispersion of fluoride particles and a binder component.
- the content of the dispersion liquid is preferably 15% by mass or more and 45% by mass or less, more preferably 18% by mass or more and 40% by mass or less, relative to the total mass of the composition for forming an optical film. It is particularly preferable that the content is 20% by mass or more and 35% by mass or less.
- the content of the binder component is preferably 0.8% by mass or more and 5% by mass or less, and is 1% by mass or more and 4% by mass or less, relative to the total mass of the composition for forming an optical film. is more preferable, and 2% by mass or more and 3% by mass or less is particularly preferable.
- the binder component is not particularly limited, and examples thereof include resins and polymerizable monomers.
- the resin is not particularly limited, and known thermosetting resins, thermoplastic resins, and the like can be used. More specifically, for example, acrylic resin, polyester resin, polycarbonate resin, polyamide resin, urethane resin, vinyl chloride resin, fluorine resin, silicon resin, epoxy resin, melamine resin, phenol resin, butyral resin, vinyl acetate resin, etc. mentioned. These resins can be used singly or in combination of two or more. Also, it may be used as a copolymer or a modified product composed of two or more kinds of resins. Among the exemplified resins, resins containing fluorine atoms such as fluororesins are preferable because they can reduce the refractive index of the optical film.
- the polymerizable monomer is not particularly limited, and known monomers that can be polymerized by radical polymerization, anionic polymerization, cationic polymerization, or the like can be used. More specifically, for example, nonionic monomers (styrene, methyl methacrylate, 2-hydroxyethyl acrylate, etc.), anionic monomers (methacrylic acid, maleic acid, itaconic acid, 2-acrylamido-2-methylpropanesulfonic acid, o- and p-styrene sulfonate, salts thereof, etc.), cationic monomers (N-(3-acrylamidopropyl) ammonium methacrylate, N-(2-methacryloyloxyethyl)-N, 1,2-dimethyl-5- vinylpyridinium methosulfate, salts thereof, etc.), cross-linking monomers (divinylbenzene, ethylene diacrylate, N,N'-methylenebisacrylamide, etc
- polymerizable monomers can be used singly or in combination of two or more.
- a polymerizable monomer containing a fluorine atom is preferable because it can reduce the refractive index of the optical film.
- the composition for forming an optical film may contain other additives as long as they do not impair the purpose and effect of the present invention.
- Other additives include, for example, photopolymerization initiators, photocurable compounds, polymerization inhibitors, photosensitizers, leveling agents, surfactants, antibacterial agents, antiblocking agents, plasticizers, ultraviolet absorbers, infrared Absorbents, antioxidants, silane coupling agents, conductive polymers, conductive surfactants, inorganic fillers, pigments, dyes and the like.
- the amount of these additives to be added can be appropriately set according to need.
- the photopolymerization initiator means an additive that generates radical species by irradiation with active energy rays such as ultraviolet rays, and includes, for example, 1-hydroxycyclohexylphenyl ketone.
- the method for producing the composition for forming an optical film is not particularly limited, and it can be produced by mixing predetermined amounts of a dispersion of fluoride particles and a binder component. Moreover, when an additive is contained, it can be manufactured by adding a predetermined amount to the mixture of the dispersion liquid of the fluoride particles and the binder component.
- the optical film of this embodiment is composed of a dried and cured film of the composition for forming an optical film described above.
- This optical film uniformly contains fluoride particles as a filler, and has a lower refractive index than, for example, an optical film using magnesium fluoride particles. In addition, it has uniform and good optical properties in the plane, such as high light transmittance and reduced haze and light reflectance.
- the optical film of the present embodiment can be used, for example, as an antireflection film or the like.
- the content of fluoride particles contained in the optical film is preferably within the range of 40% by volume to 90% by volume with respect to 100% by volume of the optical film. If the content of the fluoride particles is within the above range, it is practical because the effect of lowering the refractive index of the optical film can be maintained while suppressing the deterioration of the physical and chemical strength of the optical film.
- the thickness of the optical film is not particularly limited, and can be set appropriately as required.
- An optical film can be formed, for example, by the following method. That is, after the composition for forming an optical film is applied to a substrate or the like, the coating film of the composition for forming an optical film is dried. Subsequently, the coating film after drying is photocured by irradiating ultraviolet rays of a predetermined light intensity. Thereby, the optical film of this embodiment is obtained.
- the method of applying the composition for forming an optical film is not particularly limited, and examples thereof include dipping, spraying, spin coating, roll coating, reverse coating, gravure coating, rod coating, and bar coating. , a die coating method, a spray coating method, and the like.
- a reverse coating method particularly a reverse coating method using a small-diameter gravure roll, is preferable from the viewpoint of coating precision.
- the substrate is not particularly limited, and examples thereof include plastic sheets, plastic films, plastic panels and glass.
- the material constituting the plastic sheet, plastic film and plastic panel is not particularly limited, and examples thereof include polycarbonate, acrylic resin, polyethylene terephthalate (PET) and triacetyl cellulose (TAC).
- composition for forming an optical film may be applied onto the substrate while being added to a solvent.
- a solvent is blended for the purpose of improving the workability of coating (including printing).
- the solvent is not particularly limited as long as it dissolves the optical film-forming composition or exhibits compatibility with the optical film-forming composition.
- propylene glycol monomethyl ether can be used.
- the amount of the solvent to be used is not particularly limited as long as it is within a range suitable for forming an optical film. Within range.
- the method for drying the coated film of the optical film-forming composition (including the case where it is added to the solvent described above) coated on the substrate is not particularly limited, and can be carried out by natural drying or by blowing hot air. .
- the drying time and drying temperature are not particularly limited, and can be appropriately set according to the thickness of the coating film, constituent materials, and the like.
- the method and conditions for irradiating the coating film after drying with ultraviolet rays are not particularly limited. Irradiation conditions can be appropriately set according to the types and blending amounts of the constituent components of the composition for forming an optical film.
- the optical film of the present embodiment can be formed on the substrate.
- the viscosity is low and the dispersibility of the fluoride particles is good. Therefore, the optical film formed using the optical film-forming composition containing the dispersion has a low refractive index and uniform optical properties such as haze and light reflectance in the plane.
- the optical film of this embodiment is suitable for an antireflection film or the like.
- the average dispersed particle diameter (d50) of the fluoride particles in the dispersion was measured using a particle size distribution meter (Microtrac, Nanotrac UPA, UPA-UZ152 manufactured by Microtrac Bell Co., Ltd.).
- the average dispersed particle diameter (d50) is a particle diameter defined by the fact that 50% by volume of all the sample particles are composed of particles having an average dispersed particle diameter or less.
- Measurement principle dynamic light scattering method frequency analysis (FFT-heterodyne method)
- Light source 3mW semiconductor laser 780nm (2) Setting range: 10°C to 80°C
- Measurement object Colloidal particles
- the average dispersed particle size in Examples and Comparative Examples means the volume-equivalent average particle size measured by the dynamic light scattering method described above.
- Viscosity measurement method The viscosity of the dispersion of fluoride particles was measured with a Brookfield viscometer. DV-I PRIME (trade name) manufactured by Brookfield, USA was used as the Brookfield viscometer. Measurement was performed based on JIS K 5600-2-2 (2004).
- Rsp value An index (Rsp value) of the solvent affinity of the dispersion of fluoride particles was calculated by pulse NMR measurement.
- Spinsolve 60 ULTRA Phosphorus manufactured by Magritek was used as a measurement device, and measurement was performed by nuclear 1H NMR and CPMG (Carr-Purcell-Meiboom-Gill sequence) method.
- the Rsp value was calculated by the following formula (1).
- Rsp (Rav - Rb) / (Rb) (1)
- Rsp is an index showing solvent affinity
- Rav is the reciprocal of the relaxation time of the dispersion of fluoride particles
- Rb is the blank solvent excluding the fluoride particles in the dispersion of fluoride particles.
- Example 1 1600 g of propylene glycol monomethyl ether (PGME, reagent) and 80 g of Na 3 AlF 6 particles (manufactured by Stella Chemifa Co., Ltd.) were mixed in a fluororesin container to prepare slurry in which the Na 3 AlF 6 particles were agglomerated.
- This slurry was put into a bead mill (manufactured by Nippon Coke Industry Co., Ltd.) and subjected to dispersion treatment. After the slurry was charged, the portion where the slurry was exposed to the outside air was made into a nitrogen atmosphere. Zirconia beads (manufactured by Nikkato Co., Ltd.) were used as the beads.
- the dispersion liquid was sampled at regular intervals to measure the particle size distribution. Dispersion treatment was carried out until the average particle size (volume conversion, d50) of the Na 3 AlF 6 particles stopped decreasing, and 1000 g of a mixed liquid containing Na 3 AlF 6 particles was obtained. After that, 1 g of PLYSURF A212C (trade name, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was added as a dispersant to the mixed solution, and ultrasonic treatment was performed for 1 minute.
- PLYSURF A212C trade name, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.
- the content of Na 3 AlF 6 particles is 5% by weight with respect to the total weight of the dispersion, and Plysurf A212C as a dispersant is 2% by weight with respect to 100% by weight of Na 3 AlF 6 particles.
- a dispersion of 3 AlF 6 particles was obtained. Table 1 shows the physical properties of the obtained dispersion.
- Example 2 In this example, the amount of PLYSURF A212C added as a dispersant was changed to 2 g (4% by mass with respect to 100% by mass of Na 3 AlF 6 particles).
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Neoperex GS (trade name, manufactured by Kao Corporation) was used as a dispersant instead of Plysurf A212C.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 4 7H-dodecafluoroheptanoic acid was used as a dispersant in place of PLYSURF A212C. Also, the amount of 7H-dodecafluoroheptanoic acid added was changed to 0.1 g (0.2% by mass with respect to 100% by mass of Na 3 AlF 6 particles) with respect to 1000 g of the dispersion.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for these. Table 1 shows the physical properties of the obtained dispersion.
- Example 5 In this example, heptanoic acid was used as a dispersant instead of Plysurf A212C. The amount of heptanoic acid added was also changed to 0.1 g (0.2% by mass with respect to 100% by mass of Na 3 AlF 6 particles) per 1000 g of the dispersion. A dispersion liquid according to this example was prepared in the same manner as in Example 1 except for these. Table 1 shows the physical properties of the obtained dispersion.
- Example 6 In this example, the preparation conditions of the slurry were changed so that the content of the Na 3 AlF 6 particles was 1 mass % with respect to the total mass of the dispersion.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 7 In this example, the preparation conditions of the slurry were changed so that the content of the Na 3 AlF 6 particles was 30 mass % with respect to the total mass of the dispersion.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 8 In this example, Na 5 Al 3 F 14 was used instead of Na 3 AlF 6 particles.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 9 In this example, instead of Na 3 AlF 6 particles, LiCaAlF 6 particles (manufactured by Stella Chemifa Co., Ltd.) were used as fluoride particles.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 10 In this example, 2-propanol (IPA, reagent) was used as the dispersion solvent instead of PGME.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Example 11 In this example, methyl ethyl ketone (MEK, reagent) was used as the dispersion solvent instead of PGME. Also, 7H-dodecafluoroheptanoic acid was used as a dispersant instead of PLYSURF A212C.
- a dispersion liquid according to this example was prepared in the same manner as in Example 1 except for these. Table 1 shows the physical properties of the obtained dispersion.
- Comparative example 1 In this comparative example, Noigen (registered trademark, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), which is a nonionic surfactant, was used as a dispersant.
- a dispersion liquid according to this comparative example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Comparative example 2 In this comparative example, a cationic surfactant, Phthagent (registered trademark) 310 (trade name, manufactured by Neos Co., Ltd.) was used as a dispersant. A dispersion liquid according to this comparative example was prepared in the same manner as in Example 1 except for the above. Table 1 shows the physical properties of the obtained dispersion.
- Comparative Example 3 a dispersion liquid according to this comparative example was prepared in the same manner as in Example 1, except that no dispersing agent was used. Table 1 shows the physical properties of the obtained dispersion.
- Comparative Example 4 In this comparative example, instead of Na 3 AlF 6 particles, magnesium fluoride particles (manufactured by Stella Chemifa Co., Ltd.) were used as fluoride particles. Also, no dispersant was used. A dispersion liquid according to this comparative example was prepared in the same manner as in Example 1 except for these. Table 1 shows the physical properties of the obtained dispersion.
- Example 12 27.5 g of the dispersion prepared in Example 1 and 1.2 g of a commercially available acrylate paint (acrylic resin) were mixed. Furthermore, 0.6 g of 1-hydroxycyclohexylphenyl ketone (photopolymerization initiator) was dissolved in the mixed solution to obtain a composition for forming an optical film. Next, 10 g of this composition for forming an optical film was diluted with 10.9 g of propylene glycol monomethyl ether to prepare a low refractive index paint.
- acrylate paint acrylic resin
- a PET film (Lumirror (registered trademark) U34, thickness: 100 ⁇ m, manufactured by Toray Industries, Inc.), 300 ⁇ l of a diluted low refractive index paint was applied by spin coating. After the applied coating film was dried at 130° C., it was irradiated with ultraviolet rays of 400 mJ/cm 2 for photocuring, and an antireflection film (low refractive index layer, optical film) was laminated.
- a PET film Limirror (registered trademark) U34, thickness: 100 ⁇ m, manufactured by Toray Industries, Inc.
- 300 ⁇ l of a diluted low refractive index paint was applied by spin coating. After the applied coating film was dried at 130° C., it was irradiated with ultraviolet rays of 400 mJ/cm 2 for photocuring, and an antireflection film (low refractive index layer, optical film) was laminated.
- Example 13 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 2 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 14 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 3 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 15 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 4 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 16 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 5 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 17 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 6 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 18 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 7 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 19 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 8 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 20 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 9 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 21 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 10 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Example 22 In this example, instead of the dispersion prepared in Example 1, the dispersion prepared in Example 11 was used. Other than that, the antireflection film according to this example was laminated in the same manner as in Example 12.
- Comparative Example 5 Comparative Example 5
- the dispersion prepared in Comparative Example 1 was used instead of the dispersion prepared in Example 1.
- the antireflection film according to this comparative example was laminated in the same manner as in Example 12.
- Comparative Example 6 Comparative Example 6
- the dispersion prepared in Comparative Example 2 was used instead of the dispersion prepared in Example 1.
- the antireflection film according to this comparative example was laminated in the same manner as in Example 12.
- Comparative Example 7 Comparative Example 7
- the dispersion prepared in Comparative Example 3 was used instead of the dispersion prepared in Example 1.
- the antireflection film according to this comparative example was laminated in the same manner as in Example 12.
- Comparative Example 8 In this comparative example, instead of the dispersion prepared in Example 1, the dispersion prepared in Comparative Example 4 was used. Other than that, the antireflection film according to this comparative example was laminated in the same manner as in Example 12.
- the haze value of the antireflection film (low refractive index layer) and the minimum light reflectance of the antireflection film are measured with an ultraviolet-visible near-infrared spectrophotometer (trade name: V670, manufactured by JASCO Corporation) in accordance with JIS K 7136. was measured using an ultraviolet-visible near-infrared spectrophotometer (trade name: V670, manufactured by JASCO Corporation) in accordance with JIS K 7136. was measured using
- Table 2 shows the physical properties of the antireflection films according to Examples 12 to 22 and Comparative Examples 5 to 8.
- the light transmittance of the antireflection film was high, and the haze value was equivalent to that of the PET film alone.
- each numerical value in Examples 12 to 22 and Comparative Examples 5 to 7 in Table 2 is relative to the reference value, with the optical properties of the antireflection film of Comparative Example 8 set to 100 (reference value).
- the smaller the value the better the optical properties of the antireflection film.
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Abstract
Description
R-X-M (1)
(式中のRは、炭素数2~18のアルキル基、炭素数2~18のアリール基、炭素数2~18のポリオキシアルキレンアルキルエーテル基、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたアルキル基、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたアリール基、又は、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたポリオキシアルキレンアルキルエーテル基を表す。Xは-COO-、-PO4 -、-SO3 -又は-SO4 -を表す。Mはプロトン又はオニウムイオンを表す。)
本実施の形態に係るフッ化物粒子の分散液(以下、「分散液」という場合がある。)について、以下に説明する。
本実施の形態の分散液は、フッ化物粒子と、分散剤としてのアニオン性界面活性剤と、有機溶媒とを少なくとも含む。フッ化物粒子は有機溶媒中に分散した状態で存在する。
R-X-M (1)
H+・[NR1R2R3] (2)
ここで、化学式(2)に於けるR1、R2及びR3は、それぞれ独立して、水素、炭素数1~8、好ましくは炭素数1~5、より好ましくは炭素数1~3のアルキル基;炭素数1~8、好ましくは炭素数1~5、より好ましくは炭素数1~3のアリール基;及び炭素数1~8、好ましくは炭素数1~5、より好ましくは炭素数1~3のヒドロキシアルキル基の何れかを表す。また、R1、R2及びR3に於けるアルキル基、アリール基及びヒドロキシアルキル基は、直鎖又は分岐鎖の何れであってもよい。
次に、本実施の形態に係るフッ化物粒子の製造方法について、Na3AlF6粒子を例にして以下に説明する。尚、以下に説明する製造方法は一例であり、本発明はこの製造方法に限定されるものではない。また、以下に説明する製造方法は、Na3AlF6粒子以外のフッ化物粒子に対しても適用可能である。
次に、本実施の形態に係るフッ化物粒子の分散液の製造方法について以下に説明する。
本実施の形態の分散液は、前述の製造方法で得られるNa3AlF6粒子等のフッ化物粒子、アニオン性界面活性剤及び有機溶媒を混合し、フッ化物粒子を有機溶媒中に分散させることにより得ることができる。尚、本実施の形態に係るフッ化物粒子の分散液の製造方法には、前述のフッ化物粒子の製造方法も含まれ得る。
次に、本実施の形態に係る光学膜形成用組成物及びその製造方法について、以下に説明する。
本実施の形態の光学膜形成用組成物は、フッ化物粒子の分散液と、バインダー成分とを少なくとも含む。
次に、本実施の形態に係る光学膜及びその製造方法について、以下に説明する。
本実施の形態の光学膜は、前述の光学膜形成用組成物の乾燥硬化膜からなる。この光学膜中には、フィラーとしてのフッ化物粒子が均一に含まれており、例えば、フッ化マグネシウム粒子を用いた光学膜と比較して低屈折率である。また、光透過率が高く、ヘイズ及び光反射率が低減されるなど、面内に於いて均一かつ良好な光学特性を有する。
粒度分布計(マイクロトラック・ベル(株)製、Microtrac, NanotracUPA, UPA-UZ152)を用いて分散液中のフッ化物粒子の平均分散粒子径(d50)を測定した。尚、平均分散粒子径(d50)は、サンプル粒子全体の50体積%が平均分散粒子径以下の粒子からなることで定義される粒子径である。
測定原理:動的光散乱法周波数解析(FFT-ヘテロダイン法)
光源:3mW半導体レーザー780nm(2本)
設定範囲:10℃~80℃
測定粒度分布範囲:0.8nm~6.5406μm
測定対象:コロイド粒子
カールフィッシャー法によってフッ化物粒子の分散液中の水分濃度を測定した。水分測定装置としては、平沼産業(株)製のTQV―2200S(商品名)を用いた。測定方法は、JIS K 0068(2001)に基づき容量滴定法で行った。
B型粘度計にてフッ化物粒子の分散液の粘度を測定した。B型粘度計としては、米国ブルックフィールド社製のDV-I PRIME(商品名)を用いた。測定はJIS K 5600-2-2(2004)に基づき実施した。
パルスNMR測定によって、フッ化物粒子の分散液の溶媒親和性の指標(Rsp値)を算出した。測定装置としてMagritek製Spinsolve 60 ULTRA Phosphorusを用い、測定核1H NMR、CPMG(Carr-Purcell-Meiboom-Gill sequence)法により測定を行った。Rsp値は、以下の式(1)により算出した。
(式(1)中、Rspは溶媒親和性を示す指標であり、Ravはフッ化物粒子の分散液の緩和時間逆数であり、Rbはフッ化物粒子の分散液においてフッ化物粒子を除いたブランク溶媒の緩和時間逆数である。)
プロピレングリコールモノメチルエーテル(PGME、試薬)1600g、Na3AlF6粒子(ステラケミファ(株)製)80gをフッ素樹脂製容器で混合し、Na3AlF6粒子が凝集した状態のスラリーを作製した。このスラリーをビーズミル(日本コークス工業(株)製)に投入し、分散処理を行った。スラリーの投入後は、スラリーが外気に晒される部分を窒素雰囲気とした。また、ビーズはジルコニア製ビーズ((株)ニッカトー製)を用いた。分散処理中、一定時間ごとに分散液をサンプリングして粒度分布を測定した。Na3AlF6粒子の平均粒子径(体積換算、d50)が下げ止まるまで分散処理を行い、Na3AlF6粒子を含む混合液を1000g得た。その後、この混合液に分散剤としてのプライサーフA212C(商品名、第一工業製薬(株)製)を1g添加し、1分間の超音波処理を行った。これにより、Na3AlF6粒子の含有量が分散液の全質量に対し5質量%であり、分散剤としてのプライサーフA212CがNa3AlF6粒子100質量%に対し2質量%である、Na3AlF6粒子の分散液を得た。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散剤としてのプライサーフA212Cの添加量を2g(Na3AlF6粒子100質量%に対し4質量%)に変更した。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散剤としてプライサーフA212Cの代わりにネオぺレックスGS(商品名、花王(株)製)を用いた。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散剤としてプライサーフA212Cの代わりに7H-ドデカフルオロヘプタン酸を用いた。また、7H-ドデカフルオロヘプタン酸の添加量も分散液1000gに対して0.1g(Na3AlF6粒子100質量%に対し0.2質量%)に変更した。それら以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散剤としてプライサーフA212Cの代わりにヘプタン酸を用いた。また、ヘプタン酸の添加量も分散液1000gに対して0.1g(Na3AlF6粒子100質量%に対し0.2質量%)に変更した。それら以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、Na3AlF6粒子の含有量が分散液の全質量に対して1質量%になるようにスラリーの作製条件を変更した。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、Na3AlF6粒子の含有量が分散液の全質量に対して30質量%になるようにスラリーの作製条件を変更した。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、Na3AlF6粒子の代わりにNa5Al3F14を用いた。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、フッ化物粒子としてNa3AlF6粒子の代わりにLiCaAlF6粒子(ステラケミファ(株)製)を用いた。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散溶媒としてPGMEの代わりに2-プロパノール(IPA、試薬)を用いた。それ以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本実施例に於いては、分散溶媒としてPGMEの代わりにメチルエチルケトン(MEK、試薬)を用いた。また、分散剤としてプライサーフA212Cの代わりに7H-ドデカフルオロヘプタン酸を用いた。それら以外は、実施例1と同様の方法で本実施例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本比較例に於いては、分散剤としてノニオン性界面活性剤であるノイゲン(登録商標、第一工業製薬(株)製)を用いた。それ以外は、実施例1と同様の方法で本比較例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本比較例に於いては、分散剤としてカチオン性界面活性剤であるフタージェント(登録商標)310(商品名、(株)ネオス製)を用いた。それ以外は、実施例1と同様の方法で本比較例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本比較例に於いては、分散剤を用いないこと以外は、実施例1と同様の方法で本比較例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
本比較例に於いては、フッ化物粒子としてNa3AlF6粒子の代わりにフッ化マグネシウム粒子(ステラケミファ(株)製)を用いた。また、分散剤を用いなかった。それら以外は、実施例1と同様の方法で本比較例に係る分散液を作製した。得られた分散液の物性値を表1に示す。
実施例1で作製した分散液27.5gと市販されているアクリレート塗料(アクリル樹脂)1.2gを混合した。さらに、混合した溶液に1-ヒドロキシシクロヘキシルフェニルケトン(光重合開始剤)0.6gを溶解させ、光学膜形成用組成物とした。次に、この光学膜形成用組成物10gをプロピレングリコールモノメチルエーテル10.9gで希釈し、低屈折率塗料を作製した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例2で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例3で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例4で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例5で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例6で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例7で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例8で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例9で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例10で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本実施例に於いては、実施例1で作製した分散液の代わりに実施例11で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本実施例に係る反射防止膜を積層した。
本比較例に於いては、実施例1で作製した分散液の代わりに比較例1で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本比較例に係る反射防止膜を積層した。
本比較例に於いては、実施例1で作製した分散液の代わりに比較例2で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本比較例に係る反射防止膜を積層した。
本比較例に於いては、実施例1で作製した分散液の代わりに比較例3で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本比較例に係る反射防止膜を積層した。
本比較例に於いては、実施例1で作製した分散液の代わりに比較例4で作製した分散液を用いた。それ以外は、実施例12と同様の方法にて本比較例に係る反射防止膜を積層した。
反射防止膜(低屈折率層)のヘイズ値、反射防止膜の最低光反射率をJIS K 7136に準拠して紫外可視近赤外分光光度計(商品名:V670、日本分光(株)製)を用いて測定した。
Claims (12)
- フッ化物粒子と、前記フッ化物粒子の分散剤としてのアニオン性界面活性剤と、有機溶媒とを含み、
前記フッ化物粒子は少なくともアルミニウム及びアルカリ金属と、任意元素としてのアルカリ土類金属とを組成に含み、前記有機溶媒中に分散しているフッ化物粒子の分散液。 - 前記アニオン性界面活性剤に於ける親水基の対イオンが、プロトン又はオニウムイオンである請求項1に記載のフッ化物粒子の分散液。
- 前記アニオン性界面活性剤が、以下の化学式(1)で表されるアニオン性炭化水素界面活性剤、及びアニオン性炭化フッ素界面活性剤の少なくとも何れかである請求項1又は2に記載のフッ化物粒子の分散液。
R-X-M (1)
(式中のRは、炭素数2~18のアルキル基、炭素数2~18のアリール基、炭素数2~18のポリオキシアルキレンアルキルエーテル基、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたアルキル基、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたアリール基、又は、炭素数が2~18の範囲であって、少なくとも1個の水素原子がフッ素原子に置換されたポリオキシアルキレンアルキルエーテル基を表す。Xは-COO-、-PO4 -、-SO3 -又は-SO4 -を表す。Mはプロトン又はオニウムイオンを表す。) - 前記アニオン性界面活性剤の含有量が、前記フッ化物粒子100質量%に対して0.2質量%~8質量%の範囲内である請求項1~3の何れか1項に記載のフッ化物粒子の分散液。
- 前記フッ化物粒子が、Na3AlF6、Na5Al3F14、Na3Li3Al2F12、Na2MgAlF7、K2NaAlF6、LiCaAlF6及びLiSrAlF6からなる群より選ばれる少なくとも1種のフッ化物の粒子である請求項1~4の何れか1項に記載のフッ化物粒子の分散液。
- 前記フッ化物粒子の分散液中の水分濃度が、前記フッ化物粒子の分散液100質量%に対して1.5質量%以下である請求項1~5の何れか1項に記載のフッ化物粒子の分散液。
- 前記有機溶媒が、アルコール溶媒、ケトン溶媒及びエーテル溶媒の少なくとも何れかである請求項1~6の何れか1項に記載のフッ化物粒子の分散液。
- 前記フッ化物粒子の平均分散粒子径が1nm~100nmの範囲内である請求項1~7の何れか1項に記載のフッ化物粒子の分散液。
- 前記フッ化物粒子の含有量が、前記フッ化物粒子の分散液100質量%に対して1質量%~30質量%の範囲内である請求項1~8の何れか1項に記載のフッ化物粒子の分散液。
- 前記フッ化物粒子の分散液のパルスNMRを用いて測定されたRsp値が5以上である請求項1~9の何れか1項に記載のフッ化物粒子の分散液。
- 請求項1~10の何れか1項に記載のフッ化物粒子の分散液を含む光学膜形成用組成物。
- 請求項11に記載の光学膜形成用組成物の硬化膜からなる光学膜。
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JP2011051851A (ja) * | 2009-09-03 | 2011-03-17 | Hitachi Chem Co Ltd | 希土類フッ化物微粒子分散液、この分散液の製造方法、この分散液を用いた希土類フッ化物薄膜の製造方法、この分散液を用いた高分子化合物/希土類フッ化物複合フィルムの製造方法、及び、この分散液を用いた希土類焼結磁石 |
JP2019215451A (ja) * | 2018-06-13 | 2019-12-19 | 学校法人日本大学 | 波長変換材、及びこれを用いた太陽電池モジュール |
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KR20240013768A (ko) | 2024-01-30 |
CN117222710A (zh) | 2023-12-12 |
US20240279494A1 (en) | 2024-08-22 |
TW202311163A (zh) | 2023-03-16 |
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