Abstract: A method of producing organic pigment microparticles includes: Step 1 of precipitating organic pigment microparticles by mixing an organic pigment raw material liquid in which an organic pigment raw material is mixed with a solvent, and a precipitation solvent for precipitating the organic pigment microparticles from the organic pigment raw material liquid in a thin film fluid formed by introducing the organic pigment raw material liquid and the precipitation solvent in a space between at least two processing surfaces which are disposed so as to face each other, being capable of approaching to and separating from each other, at least one of which rotates relatively to the other; and Step 2 of coating at least a part of the organic pigment microparticles with an oxide coating; wherein the oxide coating is optically colorless and transparent, and Step 1 and Step 2 are performed out continuously in the thin film fluid.

Abstract: Provided are an immediately-before-stirring-type fluid processing device and an immediately-before-stirring-type fluid processing method that can adjust or improve the final properties of a fluid to be processed that is introduced as a raw material into an annular flow channel of a microreactor employing the annular flow channel, which is formed between relatively rotating processing surfaces, as a flow channel in which fluid processing is performed. A fluid to be processed, which has been prepared in a fluid preparing system so as to be in an ideal state for reaction, is charged into a fluid processing device. The fluid processing device subjects the fluid to be processed to reaction processing in an annular flow channel, which is formed between two processing surfaces. A cylindrical stirring space is provided in the radially inner side of the annular flow channel, and a rotor and a screen are disposed inside the stirring space.

Abstract: The object of the present invention is to provide silicon doped metal oxide particles for UV absorption, which average molar absorption coefficient in the wavelength range of 200 nm to 380 nm, is enhanced. Provided is silicon doped metal oxide particles in which the metal oxide particles are doped with silicon, wherein an average molar absorption coefficient in the wavelength range of 200 nm to 380 nm, of a dispersion in which the silicon doped metal oxide particles are dispersed in a dispersion medium, is improved as compared with similar metal oxide particles not doped with silicon.

Abstract: The problem of providing a stirrer capable of more effectively shearing a fluid to be treated is addressed, by using the action of an intermittent jet stream. A stirrer is provided with a rotor having a blade and a screen, which are relatively rotated such that the fluid to be treated is discharged from the inside of the screen to the outside as an intermittent jet stream through a slit in the screen, the stirrer satisfying condition 1 and condition 2. (Condition 1) the relationship among the width b in the rotating direction of a tip part of the blade, the width s in the circumferential direction of the slit, and the width t in the circumferential direction of the screen member is b?2s+t. (Condition 2) the relationship between the width b in the rotating direction of the tip part of the blade and the maximum inner diameter c of the screen is b?0.1c.

Abstract: The present invention is a method of producing highly crystalline silver microparticles by a reduction reaction, which comprises precipitating the silver microparticles by reacting a silver solution containing at least silver ions and a reducing agent solution containing at least a reducing agent by a continuous wet reduction method, wherein a reduction rate from the silver solution to the silver microparticles is 99% or more; an average primary particle diameter of the silver microparticles is 100 nm or more and 1,000 nm or less; and an average crystallite diameter relative to the average primary particle diameter of the silver microparticles is 80% or more. Even highly crystalline silver microparticles having 95% or more of the ratio (d/D) of the average crystallite diameter (d) relative to the average primary particle diameter (D), that is, silver microparticles in which almost all silver microparticles are single crystals, can be continuously produced by a liquid phase method, by the present invention.

Abstract: A method for producing oxide particles with controlled color characteristics and to provide oxide particles with controlled color characteristics includes controlling color characteristics of the oxide particles by controlling the ratio of M-OH bonds, the binding of one or more different elements (M) other than oxygen or hydrogen with hydroxyl group (OH), in oxide particles selected from metal oxide particles and metalloid oxide particles. Oxide particles having controlled color characteristics of any one of reflectance, transmittance, molar absorption coefficient, hue, or color saturation can be provided by controlling the percentage of the M-OH bonds contained in metal oxide particles or metalloid oxide particles.

Abstract: The present invention relates to silicon coated metal microparticles in which at least a part of a surface of a metal microparticle composed of at least one of metal elements or metalloid elements is coated with silicon, wherein the silicon coated metal microparticles are a product obtained by a reduction treatment of silicon compound coated precursor microparticles in which at least a part of a surface of a precursor microparticle containing a precursor of the metal microparticles is coated with a silicon compound, or silicon doped precursor microparticles containing a precursor of the metal microparticles. Because it is possible particularly to strictly control a particle diameter of the silicon compound coated metal microparticle by controlling conditions of the reduction treatment, design of a more appropriate composition can become facilitated, compared with a conventional composition, in terms of diversified usages and desired properties of silicon compound coated metal microparticles.

Abstract: A method of producing an organic pigment composition including at least organic pigment microparticles, wherein a diffuse reflectance of the organic pigment microparticles is controlled for the purpose of improving a luminance of a color filter. The luminance of the color filter is controlled to be high, by controlling a ratio of an area of the diffuse reflectance in a target wavelength range to a total area of the diffuse reflectance in the entire measurement wavelength range in a diffuse reflection spectrum of the organic pigment microparticles in the wavelength range of 380 to 780 nm, to be high. The luminance of the color filter is controlled to be high, by coating at least a part of the surface of the organic pigment microparticles with an oxide.

Abstract: An object of the present invention is to provide a method for producing oxide particles with controlled color characteristics and to provide oxide particles with controlled color characteristics. The present invention provides a method for producing oxide particles, comprising controlling color characteristics of the oxide particles by controlling the ratio of M-OH bonds, the binding of one or more different elements (M) other than oxygen or hydrogen with hydroxyl group (OH), in oxide particles selected from metal oxide particles and metalloid oxide particles. According to the present invention, oxide particles having controlled color characteristics of any one of reflectance, transmittance, molar absorption coefficient, hue, or color saturation can be provided by controlling the percentage of the M-OH bonds contained in metal oxide particles or metalloid oxide particles.

Abstract: A pigment composition for a green filter includes a green pigment consisting of a halogenated zinc phthalocyanine, wherein as spectral transmission characteristics of a dispersion containing only the green pigment as a pigment, the transmittance at 400 nm is 1% or less; the transmittance at 450 nm is 25% or less; the transmittance at 600 nm is 30% or less; the transmittance at 650 nm is 0.3% or less; the transmittance at the peak wavelength is 80% or more; the half value width of the peak wavelength is 120 nm or less; the transmittance at 750 nm is 1% or less; and the transmittance at 800 nm is 20% or less. The pigment composition for a green filter has low transmittance in the blue range, low transmittance in the near infrared range, and high transmittance in the green range by only a green pigment.

Abstract: A method for producing single crystalline zinc oxide nanoparticles that is capable of mass production includes mixing, between processing surfaces which are disposed in a position facing each other so as to be able to approach and separate from each other and rotate relative to each other, a zinc oxide separating solvent prepared by homogeneously mixing an acidic substance with a solvent containing at least alcohol and a raw material solution obtained by mixing a zinc oxide nanoparticle raw material with a basic solvent or a raw material solution that is basic as a result of mixing and dissolving a zinc oxide nanoparticle raw material with and into a solvent, and discharging a mixed fluid in which zinc oxide nanoparticles have separated out from between the processing surfaces.

Abstract: The present invention relates to silicon-compound-coated fine metal particles, with which surfaces of fine metal particles, composed of at least one type of metal element or metalloid element, are at least partially coated with a silicon compound and a ratio of Si—OH bonds contained in the silicon-compound-coated fine metal particles is controlled to be 0.1% or more and 70% or less. By the present invention, silicon-compound-coated fine metal particles that are controlled in dispersibility and other properties can be provided by controlling the ratio of Si—OH bonds or the ratio of Si—OH bonds/Si—O bonds contained in the silicon-compound-coated fine metal particles. By controlling the ratio of Si—OH bonds or the ratio of Si—OH bonds/Si—O bonds, a composition that is more appropriate for diversifying applications and targeted properties of silicon-compound-coated fine metal particles than was conventionally possible can be designed easily.

Abstract: The object of the present invention is to provide a composition for a laminated coating film having designability to a coated body and weather resistance. The present invention provides a composition for a laminated coating film, comprising silicon oxide-coated iron oxide particles, wherein at least a part of the surface of said iron oxide particles is coated with silicon oxide, wherein the diameter of said iron oxide particles is 1 to 50 nm, and wherein the average reflectivity of said silicon oxide-coated iron oxide particles for the light of the wavelengths of 620 to 750 nm is 25% or less. It is preferable that the transmittance of the dispersion comprising said silicon oxide-coated iron oxide particles for the light of the wavelength of 200 to 420 nm is 2.0% or less, and the transmittance of the same for the light of the wavelength of 620 to 780 nm is 80% or more.

Abstract: With an aim to provide a method for producing an oxide particle with controlled color characteristics and also provide an oxide particle with controlled color characteristics, the present invention provides a method for producing an oxide particle, wherein the color characteristics of the oxide particle are controlled by controlling a ratio of an M-OH bond between an element (M) and a hydroxide group (OH) or an M-OH bond/M-O bond ratio, where the element (M) is one element or plural different elements other than oxygen or hydrogen included in the oxide particle selected from metal oxide particles and semi-metal oxide particles. According to the present invention, by controlling the M-OH bond or the M-OH bond/M-O bond ratio of the metal oxide particle or the semi-metal oxide particle, the oxide particle with controlled color characteristics of any of reflectance, transmittance, molar absorption coefficient, hue, and saturation can be provided.

Abstract: The present invention addresses the problem of providing a method for efficiently producing uniform microparticles of curcumin and/or ?-oryzanol at a higher yield. The target microparticles are produced by dissolving a starting material in a solvent to give a starting material solution and then subjecting the starting material solution to crystallization by a poor solvent method to thereby deposit the starting material. To prepare the starting material solution, curcumin and/or ?-oryzanol are used as the starting material(s) and ethanol is used as the solvent. The starting material(s) and the solvent are stirred in a pressurized state at a temperature of 78.3-130° C. inclusive to give the starting material solution. Then, the starting material solution thus obtained is subjected to crystallization by the poor solvent method and thus the target microparticles are produced.

Abstract: A silicon oxide-coated oxide composition for coating is disclosed in which color characteristics, particularly reflectivity are controlled, and a method of producing a composition for coating is disclosed which is used by blending the composition for coating to a paint constituting a coated body in which weather resistance is required. The silicon oxide-coated oxide composition for coating in which weather resistance is required includes silicon oxide-coated oxide particles wherein at least a part of the surface of the oxide particles is coated with silicon oxide, wherein the silicon oxide is amorphous for the purpose of controlling color characteristics of the silicon oxide-coated oxide composition for coating.

Abstract: The present invention is a method of producing silicon compound coated oxide particles in which at least a part of a surface of a metal oxide particle is coated with a silicon compound, wherein wettability and color characteristics are controlled by controlling a ratio of Si—OH bonds contained in the silicon compound coated oxide particles. By the present invention, silicon compound coated oxide particles having controlled wettability such as hydrophilicity, water repellency or oil repellency, and controlled color characteristics of either reflectivity, molar absorption coefficient or transmittance can be provided.

Abstract: In a coloring ultraviolet protective agent, the average molar absorption coefficient in the wavelength range from 200 nm to 380 nm is increased, and the color characteristics in the visible region are controlled. The coloring ultraviolet protective agent is useful for shielding ultraviolet rays and coloring.

Abstract: At least a first fluid and a second fluid are used and are not miscible with each other. At least the first fluid includes one or two items selected from an organic compound, a reactant, and a phase transfer catalyst. From among the fluids other than the first fluid, at least the second fluid includes at least one item from among the items not selected from the three items. The first fluid and second fluid contain all three items. Each of the fluids are merged in a thin-film fluid formed between processing faces that rotate relative to each other. A phase transfer catalyst reaction occurs in the thin-film fluid. Among the first fluid and the second fluid, at least the fluid containing the phase transfer catalyst is prepared so that the phase transfer catalyst is substantially homogeneously mixed before being introduced between the processing faces.

Abstract: Composite phthalocyanine microparticles of a nano-order level, preferably on the order of 100 nm, that are optimal as a coloring material are provided; and a method for producing the same. The method for producing composite phthalocyanine microparticles includes a step (1) for preparing a dissolved solution by dissolving at least copper phthalocyanine and titanyl phthalocyanine and/or cobalt phthalocyanine as raw materials in a first solvent, a step (2) for precipitating composite phthalocyanine by mixing the dissolved solution obtained in step (1) with a second solvent that serves as a poor solvent of the abovementioned raw materials, and a step (3) for causing an organic solvent to act on the composite phthalocyanine obtained in step (2). Also provided are composite phthalocyanine microparticles containing at least copper phthalocyanine and titanyl phthalocyanine and/or cobalt phthalocyanine, the composite phthalocyanine microparticles having an aspect ratio of 1.1-2.5 and a particle size of 5-100 nm.