WO2011013501A1 - 絶縁化超微粉末およびその製造方法、並びに高誘電率樹脂複合材料 - Google Patents
絶縁化超微粉末およびその製造方法、並びに高誘電率樹脂複合材料 Download PDFInfo
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- WO2011013501A1 WO2011013501A1 PCT/JP2010/061708 JP2010061708W WO2011013501A1 WO 2011013501 A1 WO2011013501 A1 WO 2011013501A1 JP 2010061708 W JP2010061708 W JP 2010061708W WO 2011013501 A1 WO2011013501 A1 WO 2011013501A1
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- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- 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
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/56—Treatment of carbon black ; Purification
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/002—Inhomogeneous material in general
- H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C01P2004/16—Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0239—Coupling agent for particles
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/032—Materials
- H05K2201/0323—Carbon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to an insulated ultrafine powder, a production method thereof, and a high dielectric constant resin composite material using the insulated ultrafine powder.
- a high-capacitance capacitor is provided on the wiring board to remove high-frequency noise.
- Such a large-capacitance capacitor is realized by forming a high dielectric constant layer on a wiring board.
- the high dielectric constant material is useful for reducing the size and thickness of these members. In particular, it is required to impart such characteristics to a resin material having excellent processability and moldability.
- the metal oxide that forms the insulating film of the above-mentioned insulated ultrafine powder is formed by depositing metal alkoxide as a metal hydroxide by sol-gel reaction in an organic solvent in which conductive ultrafine powder is dispersed, and then dehydrating and condensing the surface. It is obtained by applying a treatment to make it hydrophobic.
- the insulated ultrafine powder obtained in this way has a porous film obtained by the sol-gel method, and therefore, a high dielectric constant resin composite material highly filled with the insulated ultrafine powder has a high dielectric constant. Thus, there is a problem that tan ⁇ indicating the loss of electric energy tends to increase.
- the present invention uses an insulated ultrafine powder capable of reducing tan ⁇ while maintaining a high dielectric constant of a high dielectric constant resin composite material, a method for producing the same, and the insulated ultrafine powder.
- An object is to provide a high dielectric constant resin composite material.
- the present inventors have achieved an insulated ultrafine powder capable of increasing the dielectric constant of a resin composite material while suppressing an increase in tan ⁇ by a simple method, and a method for producing the same. And a high dielectric constant resin composite material. That is, the present invention is as follows.
- the constituent metal element of the liquid metal alkoxide contains at least one of Ti and Zr.
- the coupling agent is a silane coupling agent.
- [7] Highly obtained by blending the insulated ultrafine powder according to the above [1] or [2] and the resin in a volume ratio (insulated ultrafine powder / resin) in the range of 5/95 to 50/50.
- Dielectric constant resin composite material [8] The high dielectric constant resin composite material according to [7], wherein the resin is a thermoplastic resin. [9] The high dielectric constant resin composite material according to [7], wherein the resin is any one of polypropylene, polystyrene, modified polyphenylene ether, polybutylene terephthalate, and polyphenylene sulfide. [10] The high dielectric constant resin composite material according to [7], wherein the specific gravity is 2 or less. [11] The high dielectric constant resin composite material according to [7], further containing a filler. [12] The high dielectric constant resin composite material according to [7], wherein the relative dielectric constant is 10 or more.
- a method for producing insulated ultrafine powder wherein a liquid metal alkoxide is added to a methanol-containing organic solvent in which conductive ultrafine powder made of a carbon material is dispersed, and water is further added.
- an insulated ultrafine powder capable of reducing tan ⁇ while maintaining a high dielectric constant of a high dielectric constant resin composite material, a method for producing the same, and a high-temperature using the insulated ultrafine powder.
- a dielectric constant resin composite material can be provided.
- the first insulated ultrafine powder of the present invention can be obtained by adding a liquid metal alkoxide to a methanol-containing organic solvent in which a conductive ultrafine powder made of a carbon material is dispersed, and further adding water.
- the second insulating ultrafine powder of the present invention is obtained by adding a liquid metal alkoxide to a methanol-containing organic solvent in which conductive ultrafine powder made of a carbon material is dispersed, and further adding an organosilicon compound or a coupling agent. It is obtained by adding water later.
- the first insulated ultrafine powder and the second insulated ultrafine powder of the present invention (hereinafter, these may be collectively referred to as “insulated ultrafine powder of the present invention”) will be described in detail.
- conductive ultrafine powder those having the effect of reducing the volume resistance of the resin composite material when added alone to the resin material, that is, imparting conductivity, are used.
- conductive carbon materials such as natural graphite, artificial graphite, furnace carbon black, graphitized carbon black, carbon nanotube, and carbon nanofiber are used.
- the ultrafine powder of metal which is a representative conductor, is not only easily oxidized except for some precious metals, but also has a possibility of dust explosion.
- metal atoms diffuse from the ultrafine powder into the insulating medium, thereby reducing the insulating properties of the resin composite material.
- the conductive carbon material does not have such problems, and the carbon material has a small specific gravity of 2.2, and has characteristics that other conductive materials and conventional high dielectric constant fillers do not have. There is also an effect of weight reduction.
- the conductive ultrafine powder used in the present invention is preferably a spherical carbon material having a particle diameter of 1 nm to 500 nm, more preferably 5 nm to 300 nm, and still more preferably 10 nm to 100 nm.
- a spherical carbon material for example, carbon black is obtained by thermally decomposing a hydrocarbon raw material in a gas phase.
- Graphitized carbon black vaporizes a carbon material by arc discharge and cools and solidifies the vaporized carbon vapor in a decompression vessel maintained at an internal pressure of 2 to 19 Torr by an atmosphere system of He, CO, or a mixed gas thereof. Can be obtained.
- Seest S or Talker Black # 7100F manufactured by Tokai Carbon Co., Ltd. conductive carbon black # 5500, # 4500, # 4400, # 4300, graphitized carbon black # 3855, # 3845, # 3800, or And # 3050B, # 3030B, # 3230B, # 3350B, MA7, MA8, MA11 manufactured by Mitsubishi Chemical Corporation, or Ketjen Black EC and Ketjen Black EC600JD manufactured by Lion Corporation.
- the “spherical shape” does not necessarily need to be a strict spherical shape, and may be an isotropic shape. For example, it may be a polyhedron with corners. Further, “particle diameter” in the case of non-spherical means the minimum diameter.
- the conductive ultrafine powder used in the present invention is preferably a fibrous carbon material having a cross-sectional diameter of 1 nm to 500 nm, more preferably 5 nm to 300 nm, and still more preferably 10 nm to 200 nm.
- the length is preferably 3 to 300 times the cross-sectional diameter.
- Such fibrous carbon materials such as carbon nanofibers and carbon nanotubes can be obtained by mixing cobalt and iron organometallic compounds as a catalyst and a hydrocarbon raw material in a gas phase and heating. Some carbon nanofibers are obtained by melt spinning a phenolic resin and heating in a non-active atmosphere.
- fibrous means a shape extending in one direction, and may be, for example, a square bar shape, a round bar shape, or an oval shape. Further, the “cross-sectional diameter” in the case of a square bar shape means the minimum diameter.
- the conductive ultrafine powder used in the present invention includes a plate-like carbon material having a thickness of preferably 1 nm to 500 nm, more preferably 5 nm to 300 nm, and still more preferably 10 nm to 200 nm.
- the length and width are preferably not less than 3 times and not more than 300 times the thickness.
- a plate-like carbon material can be obtained, for example, by refining, pulverizing, and classifying natural graphite or artificial graphite. Examples thereof include SGP series and SNO series manufactured by SEC Carbon Co., Ltd., Japanese graphite, scaly graphite powder, exfoliated graphite powder, and the like. These may be further pulverized and precision classified.
- the “plate shape” means a shape in which one direction is contracted, and may be, for example, a flat spherical shape or a scale shape.
- the particle diameter, the cross-sectional diameter, or the thickness within the above range, it is possible to prevent a decrease in conductivity due to the quantum size effect. Moreover, it becomes easy to manufacture and can be used industrially, and it is possible to make it difficult to reduce handleability due to aggregation or the like. Furthermore, the continuous layer can be sufficiently formed within the range of 50 vol% or more, that is, the addition rate that does not deteriorate the resin characteristics. Further, when the shape of the conductive ultrafine powder is a fiber or a plate, the aspect ratio is preferably 3 to 300. Among the conductive ultrafine powders used in the present invention, the fibrous shape is more preferable than the spherical shape or the plate shape.
- the amount of addition necessary for forming a continuous layer as a resin composite material having a relative dielectric constant of 20 or more is less, for example, 30 vol% or less in the fibrous form.
- the particle diameter, cross-sectional diameter, thickness and aspect ratio can be obtained with a scanning electron microscope.
- a liquid metal alkoxide is added to a methanol-containing organic solvent in which conductive ultrafine powder made of a carbon material is dispersed, and water is further added to form an insulating film on the surface of the conductive ultrafine powder.
- the liquid metal alkoxide used for forming the insulating film is a metal alkoxide that is in a liquid state at a temperature below the boiling point of methanol, that is, at less than 64.7 ° C. under normal pressure.
- tetraethoxytitanium having a melting point of 54 ° C. can be mentioned.
- alkoxytitanium such as tetraisopropoxytitanium, tetranormalbutoxytitanium, tetranormalbutoxytitanium dimer, tetra-2-ethylhexoxytitanium, triethoxymonopropoxytitanium, which is liquid at room temperature; tetrasecondary butoxyzirconium, tetra Alkoxy zirconium such as tertiary butoxy zirconium;
- the methanol content in the methanol-containing organic solvent is preferably 5% by weight or more, more preferably 12% by weight or more, further preferably 20% by weight or more, and preferably 100% by weight. Particularly preferred.
- the organic solvent used with methanol include ethanol, 2-propanol, acetone, 2-butanone, tetrahydrafuran, dimethylformamide, dimethylacetamide, N-methyl-2-pyrrolidone, hexane, toluene, xylene and the like.
- the usage-amount of a methanol containing organic solvent is prescribed
- the amount of methanol used is an amount such that a methoxy group is generated by the alcohol substitution reaction of the liquid metal alkoxide and a solid metal methoxide is generated, and is 4 times (molar ratio) of the liquid metal alkoxide. It is preferable to have the above content.
- methanol is added after adding a liquid metal alkoxide to an organic solvent (for example, an organic solvent other than methanol described above) in which conductive ultrafine powder made of a carbon material is dispersed. Good. Methanol may be added to the organic solvent together with the liquid metal alkoxide or alternately.
- an organic solvent for example, an organic solvent other than methanol described above
- methanol is an essential component as an organic solvent.
- a liquid metal alkoxide becomes a solid by an alcohol substitution reaction, and a precursor of an insulating film (for example, on the surface of the conductive ultrafine powder (for example, , Tetramethoxytitanium), which is a very important component.
- hydrolysis reaction and dehydration polycondensation reaction proceed by adding water, and a dense TiO 2 insulating film is formed on the surface of the conductive ultrafine powder.
- the ultrafine powder having the insulating film formed by the above method hydroxyl groups remain on the surface.
- This surface hydroxyl group crosslinks the insulated ultrafine powder with an insulating metal oxide film by dehydration condensation accompanying filtration and drying. That is, the insulated ultrafine powder may be hardened.
- the insulation film may be destroyed in melt kneading with a thermoplastic resin under mass production conditions using a twin screw extruder or the like. It tends to occur and destabilizes the dielectric properties.
- the surface is treated with an organosilicon compound or a coupling agent (particularly, a coupling agent having an alkoxide group) to make it hydrophobic, as in the second insulated ultrafine powder of the present invention. .
- the second insulated ultrafine powder of the present invention first, as in the case of the first insulated ultrafine powder, a liquid is obtained in a methanol-containing organic solvent in which conductive ultrafine powder made of a carbon material is dispersed. Add metal alkoxide. Then, it is obtained by adding water after adding an organosilicon compound or a coupling agent.
- the reaction between the liquid metal alkoxide and the organosilicon compound or the coupling agent and water is carried out in a methanol-containing organic solvent in which the conductive ultrafine powder is dispersed. It can proceed at room temperature and normal pressure.
- steps such as addition of an acid or an alkali catalyst for promoting the reaction, dehydration or distillation are not required, so that an insulated ultrafine powder with high productivity is obtained. Can do.
- the organosilicon compound used for the surface treatment in the present invention is one or two selected from the group consisting of alkoxysilane, an organosilane compound generated from alkoxysilane, polysiloxane, modified polysiloxane, terminal-modified polysiloxane, and fluoroalkylsilane. These compounds. Of these, alkoxysilane, fluoroalkylsilane, and polysiloxane are preferable.
- alkoxysilane examples include methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, dimethyldimethoxysilane, methyltrimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, isobutyltrimethoxysilane.
- An alkoxysilane such as ethoxysilane or an organosilane compound produced from the alkoxysilane is more preferable.
- polysiloxane examples include polysiloxane having a methylhydrogensiloxane unit, polyether-modified polysiloxane, and terminal carboxylic acid-modified polysiloxane having a terminal modified with a carboxylic acid.
- fluoroalkylsilane examples include trifluoropropyltrimethoxysilane, tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane, heptadecafluorodecylmethyldimethoxysilane, trifluoropropylethoxysilane, Examples include decafluorooctyltriethoxysilane and heptadecafluorodecyltriethoxysilane.
- one or more coupling agents selected from the group consisting of silane, titanate, aluminate and zirconate coupling agents can be used.
- the silane coupling agent includes a part of the organosilicon compounds mentioned above, that is, alkoxysilane, but the silane coupling agent other than alkoxysilane includes methyltrichlorosilane, Phenyltrichlorosilane, dimethyldichlorosilane, methyltrichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane, isobutyltrichlorosilane, decyltrichlorosilane, vinyltrichlorosilane, vinyltrichlorosilane, ⁇ -aminopropyltrichlorosilane, ⁇ -glycidoxy Propyltrichlorosilane, ⁇ -mercaptopropyltrichlorosilane, ⁇ -methacryloxypropyltrichlorosilane, N- ⁇ (aminoethyl) - ⁇ -aminopropy
- Titanate coupling agents include isopropyl tristearoyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, isopropyl tri (N-aminoethylaminoethyl) titanate, tetraoctyl bis (ditridecyl phosphate) titanate, tetra (2- Examples include 2-diallyloxymethyl-1-butyl) bis (ditridecyl) phosphate titanate, bis (dioctylpyrophosphate) oxyacetate titanate, bis (dioctylpyrophosphate) ethylene titanate, and the like.
- aluminate coupling agent examples include acetoalkoxyaluminum diisopropylate, aluminum diisopropoxy monoethyl acetoacetate, aluminum trisethyl acetoacetate, aluminum trisacetylacetonate and the like.
- zirconate coupling agent examples include zirconium tetrakisacetylacetonate, zirconium dibutoxybisacetylacetonate, zirconium tetrakisethylacetoacetate, zirconium tributoxymonoethylacetoacetate, zirconium tributoxyacetylacetonate and the like.
- the amount of the surface treatment agent used varies depending on the amount of surface hydroxyl groups, but is 0.01 to 30 weights per 100 parts by weight of the insulated ultrafine powder (that is, the first insulated ultrafine powder) before the treatment. Part is preferred. Within this range, the insulated ultrafine powder can be sufficiently dispersed in the resin, and the adhesion between the insulated ultrafine powder and the resin can be ensured. More preferred is 0.1 to 25 parts by weight, and particularly preferred is 1 to 15 parts by weight.
- the calcination treatment is preferably carried out by holding in the temperature range of 200 ° C. to 1000 ° C. for 30 minutes to 24 hours.
- the firing atmosphere needs to be non-oxidizing. That is, it is necessary to block oxygen by performing nitrogen substitution or argon substitution.
- the high dielectric constant resin composite material of the present invention comprises a volume ratio (insulated ultrafine powder / resin) of 5/95 to 50/50, that is, the above-described insulated ultrafine powder of the present invention and resin. It is obtained by blending the insulated ultrafine powder in the range of 5 to 50 vol%.
- a high dielectric constant resin composite material having a relative dielectric constant of 20 or more can be obtained by blending the insulating ultrafine powder of the present invention with a resin in an amount of 50 vol% or less.
- a resin in an amount of 50 vol% or less.
- the filler in an amount of about 50 vol% or more.
- the insulated ultrafine powder may be blended in an amount of 5 to 50 vol%. Therefore, the resin composite material in which the insulated ultrafine powder of the present invention is blended exhibits a high dielectric constant without impairing the moldability and lightness that are the original characteristics of the resin material.
- the resin component to which the insulated ultrafine powder is added may be either a thermoplastic resin or a thermosetting resin, but is preferably a thermoplastic resin.
- Thermoplastic resins include engineering plastics such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyvinyl acetate, ABS resin, AS resin, acrylic resin, polyacetal, polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, etc.
- Super engineering plastics such as plastic, polyarylate, polysulfone, polyphenylene sulfide, polyethersulfone, polyetheretherketone, polyimide resin, fluororesin, and polyamideimide are listed. Of these, polypropylene, polystyrene, modified polyphenylene ether, polybutylene terephthalate, or polyphenylene sulfide is preferable from the viewpoint of low dielectric loss tangent and good injection moldability.
- Thermosetting resins include phenolic resin, amino resin (urea resin, melamine resin, benzoguanamine resin), unsaturated polyester resin, diallyl phthalate resin (allyl resin), alkyd resin, epoxy resin, urethane resin (polyurethane), silicon resin (Silicone).
- the high dielectric constant resin composite material of the present invention can be used by further adding a filler as necessary for purposes other than the high dielectric constant.
- Fillers include glass fiber for improving elastic modulus, calcium carbonate for reducing molding shrinkage, talc used for improving surface smoothness and wear resistance, and mica used for improving dimensional stability. Is mentioned.
- Examples of the filler that imparts flame retardancy, that is, a flame retardant include halogen-based or phosphorus-based flame retardants, aluminum hydroxide, and magnesium hydroxide.
- ferrite powders and magnetic metal body powders mainly composed of iron, which are used in the adjustment of radio wave absorption characteristics, or conductive powders such as carbon or tin oxide are used.
- An expanded graphite powder, which is a conductive powder that also has an effect as a flame retardant, can be further added as a filler.
- the addition amount of the insulated ultrafine powder to the resin composition is 5 to 50 vol% as described above, but preferably 5 to 30 vol%. When it is less than 5 vol%, a continuous layer is not formed in the resin composition, and a sufficient dielectric constant cannot be obtained. On the other hand, when it is more than 50 vol%, the original processability of the resin composition is impaired.
- the high dielectric constant resin composite material of the present invention uses a carbon material as a raw material for the insulated ultrafine powder, its specific gravity can be reduced to 2 or less.
- the high dielectric constant resin composite material of the present invention preferably has a relative dielectric constant of 20 or more.
- a layer having a high dielectric constant resin composite material of 1 ⁇ m or more and 3 mm or less more specifically, at least a film formed to a thickness of 1 ⁇ m to 100 ⁇ m or a sheet formed to a thickness of 100 ⁇ m to 3 mm
- An antenna substrate can be formed by providing a wiring pattern on one surface.
- the IC When the high dielectric constant resin composite material of the present invention is used for a non-contact IC card / tag, the IC may be directly wired to the wiring pattern of the antenna substrate, or the card / tag containing the IC and the antenna substrate may be contacted. It may be used as a booster antenna. Moreover, when using the film or sheet
- a radio wave absorber having a relative dielectric constant of 20 or more can be obtained by blending the insulating ultrafine powder of the present invention in an amount of 5 vol% to 50 vol% in the resin.
- the filler in order to realize a radio wave absorber having a relative dielectric constant of 20 or more, when a conventional high dielectric constant filler is used, it is necessary to blend the filler in an amount of about 50 vol% or more.
- the insulated ultrafine powder may be blended in an amount of 50 vol% or less, for example, 5 to 50 vol%. Therefore, the resin composite material in which the insulated ultrafine powder of the present invention is blended exhibits a high dielectric constant without impairing the moldability and lightness that are the original characteristics of the resin material.
- the radio wave absorber using the high dielectric constant resin composite material of the present invention has a high dielectric constant, when formed into a sheet, the thickness with respect to the wavelength of the radio wave to be absorbed may be 1/20 or less. it can.
- the radio wave absorber using the high dielectric constant resin composite material of the present invention can be used inside the casing, and exhibits excellent performance as an electronic device.
- a carbon material is used as the raw material for the insulated ultrafine powder, the specific gravity of the radio wave absorber can be lowered to 2 or less, and further weight reduction can be achieved.
- carbon black particles (insulated ultrafine powder) insulated with TiO 2 were obtained by drying the wet cake separated into solid and liquid using a vacuum filter bottle using a vacuum dryer.
- the insulated ultrafine powder was observed with a scanning transmission electron microscope (HD-2300 manufactured by Hitachi High-Technologies Corporation) at a magnification of 400,000, and a TiO 2 film was formed on the carbon black surface. Was confirmed. It was found that the coating state was smooth and a dense coating. (FIG. 1).
- carbon black particles (insulated ultrafine powder) insulated with TiO 2 were obtained by drying the wet cake separated into solid and liquid using a vacuum filter bottle using a vacuum dryer.
- the insulated ultrafine powder was observed with a scanning transmission electron microscope (HD-2300 manufactured by Hitachi High-Technologies Corporation) at a magnification of 400,000, and a TiO 2 film was formed on the carbon black surface. Was confirmed. However, it was found that the coating state had many irregularities and voids existed. (FIG. 2).
- Synthesis method 5 of insulated ultrafine powder It was synthesized in the same manner using natural graphite (plate shape with a thickness of 100 to 200 nm, average thickness of 150 nm, 1 to 3 ⁇ m square, and an average of 2 ⁇ m square) instead of carbon black in the particle synthesis method 1, and insulated with TiO 2. Natural graphite particles (insulated ultrafine powder) were obtained.
- a resin composite material was obtained by melt-kneading and pelletizing at ° C. When the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 25 and a dielectric loss tangent of 0.01. Furthermore, the specific gravity of the resin composite material was 1.49.
- Example 2 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 1 except that the volume ratio of insulated ultrafine powder / PPS was 20/80.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 20 and a dielectric loss tangent of 0.006.
- the specific gravity of the resin composite material was 1.46.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 40 and a dielectric loss tangent of 0.02.
- the specific gravity of the resin composite material was 1.52.
- Example 4 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 3 except that the particles synthesized by the synthesis method 2 of the insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 39 and a dielectric loss tangent of 0.02.
- the specific gravity of the resin composite material was 1.52.
- Example 1 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 3 except that the particles synthesized by the synthesis method 3 of insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 39 and a dielectric loss tangent of 0.04.
- the specific gravity of the resin composite material was 1.52.
- Example 5 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 1 except that the particles synthesized by the synthesis method 4 of insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 28 and a dielectric loss tangent of 0.01.
- the specific gravity of the resin composite material was 1.45.
- Example 6 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 1 except that the particles synthesized by the synthesis method 5 of the insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 25 and a dielectric loss tangent of 0.008.
- the specific gravity of the resin composite material was 1.45.
- Example 7 A resin composite material was obtained by melt-kneading and pelletizing at 300 ° C. in a melt-kneader in the same manner as in Example 1 except that the particles synthesized by the synthesis method 6 of the insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 26 and a dielectric loss tangent of 0.012.
- the specific gravity of the resin composite material was 1.49.
- a resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. in a melt-kneader so as to be 37.5.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 15 and a dielectric loss tangent of 0.008.
- the specific gravity of the resin composite material was 1.24.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 12 and a dielectric loss tangent of 0.005.
- the specific gravity of the resin composite material was 1.2.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 18 and a dielectric loss tangent of 0.011.
- the specific gravity of the resin composite material was 1.29.
- Example 11 A resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. in a melt-kneader in the same manner as in Example 8 except that the particles synthesized by the synthesis method 2 of insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 11 and a dielectric loss tangent of 0.005.
- the specific gravity of the resin composite material was 1.2.
- Example 2 A resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. in a melt-kneader in the same manner as in Example 8 except that the particles synthesized by the synthesis method 3 of the insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 11 and a dielectric loss tangent of 0.04. Furthermore, the specific gravity of the resin composite material was 1.2.
- Example 12 A resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. in a melt-kneader in the same manner as in Example 8 except that the particles synthesized by the synthesis method 4 of insulated ultrafine powder were used.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 10 and a dielectric loss tangent of 0.005.
- the specific gravity of the resin composite material was 1.21.
- a resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. When the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 16 and a dielectric loss tangent of 0.01. Furthermore, the specific gravity of the resin composite material was 1.45.
- Example 14 A resin composite material was obtained by melt-kneading and pelletizing at 270 ° C. in a melt-kneader in the same manner as in Example 13 except that the volume ratio of insulated ultrafine powder / PBT was 20/80. When the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 13 and a dielectric loss tangent of 0.008. The specific gravity of the resin composite material was 1.29.
- Example 15 Except that the volume ratio of insulated ultrafine powder / PBT was 30/70, a resin composite material was obtained in the same manner as in Example 13 by melting and kneading at 270 ° C. using a melt kneader. When the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 20 and a dielectric loss tangent of 0.015. The specific gravity of the resin composite material was 1.53.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 12 and a dielectric loss tangent of 0.008. Furthermore, the specific gravity of the resin composite material was 1.07.
- Example 17 A resin composite material was obtained by melt-kneading and pelletizing at 220 ° C. in a melt-kneader in the same manner as in Example 16 except that the volume ratio of insulated ultrafine powder / PP was 20/80.
- the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 10 and a dielectric loss tangent of 0.007.
- the specific gravity of the resin composite material was 1.05.
- Example 18 A resin composite material was obtained by melt-kneading and pelletizing at 220 ° C. with a melt-kneader in the same manner as in Example 16 except that the volume ratio of insulated ultrafine powder / PP was 30/70. When the dielectric constant at 1 MHz was measured, it was found to be a relative dielectric constant of 14 and a dielectric loss tangent of 0.009. The specific gravity of the resin composite material was 1.12.
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Abstract
Description
このようにして得られた絶縁化超微粉末は、ゾルゲル法によって得られる皮膜が多孔質であるため、特に絶縁化超微粉末を高充填した高誘電率樹脂複合材料は誘電率が高くなる一方で、電気エネルギーの損失を示すtanδが大きくなりやすいといった課題があった。
[2] 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに有機ケイ素化合物もしくはカップリング剤を添加した後に水を添加することにより得られる絶縁化超微粉末。
[3] 前記炭素材料からなる導電性超微粉末の断面径が1nm以上500nm以下である[1]または[2]記載の絶縁化超微粉末。
[4] 前記導電性超微粉末を構成する炭素材料が、カーボンナノファイバー、天然黒鉛、カーボンブラック、カーボンナノチューブまたは人造黒鉛である[1]または[2]記載の絶縁化超微粉末。
[5] 前記液状金属アルコキシドの構成金属元素が、TiおよびZrのいずれか一種類を少なくとも含む[1]または[2]記載の絶縁化超微粉末。
[6] 前記カップリング剤がシラン系カップリング剤である[2]記載の絶縁化超微粉末。
[8] 前記樹脂が熱可塑性樹脂である[7]記載の高誘電率樹脂複合材料。
[9] 前記樹脂が、ポリプロピレン、ポリスチレン、変性ポリフェニレンエーテル、ポリブチレンテレフタレート、及びポリフェニレンスルフィドのいずれかである[7]記載の高誘電率樹脂複合材料。
[10] 比重が2以下である[7]記載の高誘電率樹脂複合材料。
[11] さらに充填剤を含有する[7]記載の高誘電率樹脂複合材料。
[12] 比誘電率が10以上である[7]記載の高誘電率樹脂複合材料。
[14] 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらにアルコキシド基を有するカップリング剤を添加した後に水を添加する絶縁化超微粉末の製造方法。
本発明の第1の絶縁化超微粉末は、炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに水を添加することにより得られる。
また、本発明の第2の絶縁化超微粉末は、炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに有機ケイ素化合物もしくはカップリング剤を添加した後に水を添加することにより得られる。
以下、本発明の第1の絶縁化超微粉末および第2の絶縁化超微粉末(以下、これらをまとめて「本発明の絶縁化超微粉末」ということがある)について詳細に説明する。
具体的には、東海カーボン(株)製のシーストSやトーカブラック#7100F、導電性カーボンブラック#5500、#4500、#4400、#4300や黒鉛化カーボンブラック#3855、#3845、#3800、あるいは、三菱化学(株)製の#3050B、#3030B、#3230B、#3350B、MA7、MA8、MA11、あるいは、ライオン(株)製のケッチェンブラックEC、ケッチェンブラックEC600JDなどが挙げられる。
なお、ここで「球状」とは必ずしも厳密な球状である必要はなく、等方的な形状であればよい。例えば角が発生した多面体状であってもよい。また、球状でない場合の「粒子直径」とは最小径を意味する。
このような繊維状の炭素材料、例えばカーボンナノファイバーや、カーボンナノチューブは触媒となるコバルトや鉄の有機金属化合物と炭化水素原料を気相で混合し、加熱することによって得られる。また、カーボンナノファイバーはフェノール系樹脂を溶融紡糸し、非活性雰囲気下で加熱することによって得られるものもある。
具体的には、昭和電工(株)製のVGCFおよびVGNFや、(株)GSIクレオス製のカルベール、群栄化学工業(株)製のカーボンナノファイバーなどが挙げられる。
なお、ここで「繊維状」とは一方向に伸びた形状を意味し、例えば角材状、丸棒状や長球状であってもよい。また、角材状のような場合の「断面直径」とは最小径を意味する。
このような板状の炭素材料は、例えば天然黒鉛や人造黒鉛を精製・粉砕・分級することによって得られる。例えば、SECカーボン(株)製のSGPシリーズ、SNOシリーズ等や日本黒鉛製、鱗状黒鉛粉末、薄片化黒鉛粉末等が挙げられる。また、これらをさらに粉砕し、精密分級してもよい。
なお、ここで「板状」とは、一方向が縮んだ形状を意味し、例えば扁平球状や鱗片状であってもよい。
また、導電性超微粉末の形状が繊維状もしくは板状の場合、アスペクト比は3~300が好ましい。本発明で用いる導電性超微粉末は、この中でも繊維状の方が球状や板状よりも好ましい。これは繊維状のほうが、比誘電率が20以上である樹脂複合材料として連続層を形成するために必要な添加量が例えば30vol%以下と少なくてすむためである。
なお、粒子直径、断面直径、厚さおよびアスペクト比は、走査型電子顕微鏡により求めることできる。
絶縁皮膜形成に用いる液状金属アルコキシドとは、メタノール沸点未満の温度、すなわち常圧下であれば64.7℃未満において、液体状態である金属アルコキシドである。例えば、融点54℃のテトラエトキシチタンが挙げられる。
特に好ましいのは室温で液体であるテトライソプロポキシチタン、テトラノルマルブトキシチタン、テトラノルマルブトキシチタンダイマー、テトラ-2-エチルヘキソキシチタン、トリエトキシモノプロポキシチタンなどのアルコキシチタン;テトラセカンダリーブトキシジルコニウム、テトラターシャリーブトキシジルコニウムなどのアルコキシジルコニウム;である。
また、メタノール含有有機溶媒の使用量は、当該有機溶媒中のメタノール量と添加する液状金属アルコキシドの量とにより規定される。具体的には、使用するメタノールの量を、液状金属アルコキシドのアルコール置換反応により、メトキシ基が生成し固体の金属メトキシドが生成する量とすることが好ましく、液状金属アルコキシドの4倍(モル比)以上の含有量となるようにすることが好ましい。
本発明の高誘電率樹脂複合材料は、既述の本発明の絶縁化超微粉末と樹脂とを、体積比(絶縁化超微粉末/樹脂)5/95~50/50、すなわち本発明の絶縁化超微粉末を5~50vol%の範囲で配合して得られるものである。
熱可塑性樹脂としては、ポリエチレン、ポリ塩化ビニル、ポリプロピレン、ポリスチレン、ポリ酢酸ビニル、ABS樹脂、AS樹脂、アクリル樹脂などの汎用プラスチック、ポリアセタール、ポリアミド、ポリカーボネート、変性ポリフェニレンエーテル、ポリブチレンテレフタレートなどのエンジニアリング・プラスチック、ポリアリレート、ポリスルホン、ポリフェニレンスルフィド、ポリエーテルスルホン、ポリエーテルエーテルケトン、ポリイミド樹脂、フッ素樹脂、ポリアミドイミドなどのスーパー・エンジニアリング・プラスチックが挙げられる。これらの中で、低誘電正接かつ良好な射出成形性の観点から、ポリプロピレン、ポリスチレン、変性ポリフェニレンエーテル、ポリブチレンテレフタレート、ポリフェニレンスルフィドのいずれかであることが好ましい。
また、必要に応じて、高誘電率樹脂複合材料のフィルムまたはシートにスルーホールを設けることも可能である。
なお、比誘電率の測定については、樹脂複合材料を30mmφ、厚さ3mmのディスクに成形し、インピーダンスアナライザー(アジレント社製、4294A)を用いて室温で1MHzにて測定した。
2Lガラス製反応容器を使用し、メタノール800重量部中にカーボンブラック(球状体粒子直径50~100nm、平均粒径40nm)100重量部とテトライソプロポキシチタン100重量部を添加し、30℃にて1時間攪拌混合した。次に、フェニルトリメトキシシラン10重量部を添加し、30分間混合した。さらに、蒸留水30重量部を30分間かけて滴下し、2時間撹拌し、TiO2で絶縁化されたカーボンブラック粒子/メタノール分散液を得た。次に、減圧濾過瓶を使用し固液分離したウェットケーキを、減圧乾燥器を使用し乾燥することにより、TiO2で絶縁化されたカーボンブラック粒子(絶縁化超微粉末)を得た。当該絶縁化超微粉末について、走査型透過電子顕微鏡((株)日立ハイテクノロジーズ社製HD-2300)により倍率40万倍で観察したところ、カーボンブラック表面に、TiO2被膜が形成されていることが確認された。その被膜状態は平滑であり、緻密な被膜であることが窺えた。(図1)。
粒子合成方法1においてメタノール/2-ブタノン(100重量部/700重量部)混合溶媒とした他は、同様に合成し、TiO2で絶縁化されたカーボンブラック粒子(絶縁化超微粉末)を得た。
2Lガラス製反応容器を使用し、イソプロパノール800重量部中にカーボンブラック(球状体粒子直径50~100nm、平均粒径40nm)100重量部とテトライソプロポキシチタン100重量部を添加し、30℃にて1時間攪拌混合した。次に、フェニルトリメトキシシラン10重量部を添加し、30分間混合した。さらに、蒸留水30重量部を30分間かけて滴下し、2時間撹拌し、TiO2で絶縁化されたカーボンブラック粒子/イソプロパノール分散液を得た。次に、減圧濾過瓶を使用し固液分離したウェットケーキを、減圧乾燥器を使用し乾燥することにより、TiO2で絶縁化されたカーボンブラック粒子(絶縁化超微粉末)を得た。当該絶縁化超微粉末について、走査型透過電子顕微鏡((株)日立ハイテクノロジーズ 社製HD-2300)により倍率40万倍で観察したところ、カーボンブラック表面に、TiO2被膜が形成されていることが確認された。ただし、その被膜状態は凹凸が多数あり、空隙が存在することが窺えた。(図2)。
粒子合成方法1のカーボンブラックの代わりにカーボンナノファイバー(断面直径150nm、長さ5~6μmの繊維状)を用いて同様に合成し、TiO2で絶縁化されたカーボンナノファイバー粒子(絶縁化超微粉末)を得た。
粒子合成方法1のカーボンブラックの代わりに天然黒鉛(厚さ100~200nm、平均厚さ150nm、1~3μm角、平均2μm角の板状)を用いて同様に合成し、TiO2で絶縁化された天然黒鉛粒子(絶縁化超微粉末)を得た。
粒子合成方法1のテトライソプロポキシチタンの代わりにテトラターシャリーブトキシジルコニウムを用いた他は同様に粒子を合成し、ZrO2で絶縁化されたカーボンブラック粒子(絶縁化超微粉末)を得た。
絶縁化超微粉末の合成方法1で得られた絶縁化超微粉末とポリフェニレンスルフィド(PPS)を、絶縁化超微粉末/PPSの体積比=25/75となるように溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率25、誘電正接0.01であった。さらに、樹脂複合材料の比重は1.49であった。
絶縁化超微粉末/PPSの体積比=20/80とした他は、実施例1と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率20、誘電正接0.006であった。さらに、樹脂複合材料の比重は1.46であった。
絶縁化超微粉末/PPSの体積比=30/70とした他は、実施例1と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率40、誘電正接0.02であった。また、樹脂複合材料の比重は1.52であった。
絶縁化超微粉末の合成方法2で合成した粒子を用いた他は、実施例3と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率39、誘電正接0.02であった。また、樹脂複合材料の比重は1.52であった。
絶縁化超微粉末の合成方法3で合成した粒子を用いた他は、実施例3と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率39、誘電正接0.04であった。また、樹脂複合材料の比重は1.52であった。
絶縁化超微粉末の合成方法4で合成した粒子を用いた他は、実施例1と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率28、誘電正接0.01であった。また、樹脂複合材料の比重は1.45であった。
絶縁化超微粉末の合成方法5で合成した粒子を用いた他は、実施例1と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率25、誘電正接0.008であった。また、樹脂複合材料の比重は1.45であった。
絶縁化超微粉末の合成方法6で合成した粒子を用いた他は、実施例1と同様に溶融混練機にて300℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率26、誘電正接0.012であった。また、樹脂複合材料の比重は1.49であった。
絶縁化超微粉末の合成方法1で得られた絶縁化超微粉末とポリフェニレンエーテル(PPE)とポリスチレン(PS)を、絶縁化超微粉末/PPE/PSの体積比=25/37.5/37.5となるように溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率15、誘電正接0.008であった。さらに、樹脂複合材料の比重は1.24であった。
絶縁化超微粉末/PPE/PSの体積比=20/40/40とした以外は、実施例8と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率12、誘電正接0.005であった。また、樹脂複合材料の比重は1.2であった。
絶縁化超微粉末/PPE/PSの体積比=30/35/35とした以外は、実施例8と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率18、誘電正接0.011であった。また、樹脂複合材料の比重は1.29であった。
絶縁化超微粉末の合成方法2で合成した粒子を用いた他は、実施例8と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率11、誘電正接0.005であった。さらに、樹脂複合材料の比重は1.2であった。
絶縁化超微粉末の合成方法3で合成した粒子を用いた他は、実施例8と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率11、誘電正接0.04であった。さらに、樹脂複合材料の比重は1.2であった。
絶縁化超微粉末の合成方法4で合成した粒子を用いた他は、実施例8と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率10、誘電正接0.005であった。さらに、樹脂複合材料の比重は1.21であった。
絶縁化超微粉末の合成方法1で得られた絶縁化超微粉末とポリブチレンテレフタレート(PBT)を、絶縁化超微粉末/PBTの体積比=25/75となるように溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率16、誘電正接0.01であった。さらに、樹脂複合材料の比重は1.45であった。
絶縁化超微粉末/PBTの体積比=20/80とした以外は、実施例13と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率13、誘電正接0.008であった。また、樹脂複合材料の比重は1.29であった。
絶縁化超微粉末/PBTの体積比=30/70とした以外は、実施例13と同様に溶融混練機にて270℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率20、誘電正接0.015であった。また、樹脂複合材料の比重は1.53であった。
絶縁化超微粉末の合成方法1で得られた絶縁化超微粉末とポリプロピレン(PP)を、絶縁化超微粉末/PPの体積比=25/75となるように溶融混練機にて220℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率12、誘電正接0.008であった。さらに、樹脂複合材料の比重は1.07であった。
絶縁化超微粉末/PPの体積比=20/80とした以外は、実施例16と同様に溶融混練機にて220℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率10、誘電正接0.007であった。また、樹脂複合材料の比重は1.05であった。
絶縁化超微粉末/PPの体積比=30/70とした以外は、実施例16と同様に溶融混練機にて220℃で溶融混練、ペレット化し樹脂複合材料を得た。
1MHzにおける誘電率を測定したところ、比誘電率14、誘電正接0.009であった。また、樹脂複合材料の比重は1.12であった。
Claims (14)
- 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに水を添加することにより得られる絶縁化超微粉末。
- 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに有機ケイ素化合物もしくはカップリング剤を添加した後に水を添加することにより得られる絶縁化超微粉末。
- 前記炭素材料からなる導電性超微粉末の断面径が1nm以上500nm以下である請求項1または2記載の絶縁化超微粉末。
- 前記導電性超微粉末を構成する炭素材料が、カーボンナノファイバー、天然黒鉛、カーボンブラック、カーボンナノチューブまたは人造黒鉛である請求項1または2記載の絶縁化超微粉末。
- 前記液状金属アルコキシドの構成金属元素が、TiおよびZrのいずれか一種類を少なくとも含む請求項1または2記載の絶縁化超微粉末。
- 前記カップリング剤がシラン系カップリング剤である請求項2記載の絶縁化超微粉末。
- 請求項1または2記載の絶縁化超微粉末と樹脂とを、体積比(絶縁化超微粉末/樹脂)5/95~50/50の範囲で配合して得られる高誘電率樹脂複合材料。
- 前記樹脂が熱可塑性樹脂である請求項7記載の高誘電率樹脂複合材料。
- 前記樹脂がポリプロピレン、ポリスチレン、変性ポリフェニレンエーテル、ポリブチレンテレフタレート、及びポリフェニレンスルフィドのいずれかである請求項7記載の高誘電率樹脂複合材料。
- 比重が2以下である請求項7記載の高誘電率樹脂複合材料。
- さらに充填剤を含有する請求項7記載の高誘電率樹脂複合材料。
- 比誘電率が10以上である請求項7記載の高誘電率樹脂複合材料。
- 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらに水を添加する絶縁化超微粉末の製造方法。
- 炭素材料からなる導電性超微粉末を分散したメタノール含有有機溶媒に液状金属アルコキシドを添加し、さらにアルコキシド基を有するカップリング剤を添加した後に水を添加する絶縁化超微粉末の製造方法。
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US13/386,201 US9315673B2 (en) | 2009-07-28 | 2010-07-09 | Insulated ultrafine powder, method for producing same, and high dielectric constant resin composite material |
EP10804247.4A EP2460765B1 (en) | 2009-07-28 | 2010-07-09 | Insulated ultrafine powder, method for producing same, and high dielectric constant resin composite material |
KR1020127002347A KR101737145B1 (ko) | 2009-07-28 | 2010-07-09 | 절연화 초미분말 및 그 제조 방법, 및 고유전율 수지 복합 재료 |
CN201080033556.0A CN102471066B (zh) | 2009-07-28 | 2010-07-09 | 绝缘化超微粉末及其制造方法及高介电常数树脂复合材料 |
US14/176,890 US9394447B2 (en) | 2009-07-28 | 2014-02-10 | Insulated ultrafine powder, method for producing same, and high dielectric constant resin composite material |
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US14/176,890 Division US9394447B2 (en) | 2009-07-28 | 2014-02-10 | Insulated ultrafine powder, method for producing same, and high dielectric constant resin composite material |
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US20140170305A1 (en) | 2014-06-19 |
KR20120053496A (ko) | 2012-05-25 |
CN102471066A (zh) | 2012-05-23 |
US20120142836A1 (en) | 2012-06-07 |
JP5644130B2 (ja) | 2014-12-24 |
JP2011049141A (ja) | 2011-03-10 |
US9315673B2 (en) | 2016-04-19 |
US9394447B2 (en) | 2016-07-19 |
EP2460765A1 (en) | 2012-06-06 |
CN102471066B (zh) | 2015-04-29 |
KR101737145B1 (ko) | 2017-05-17 |
EP2460765A4 (en) | 2013-04-17 |
TW201114827A (en) | 2011-05-01 |
EP2460765B1 (en) | 2018-06-06 |
TWI488904B (zh) | 2015-06-21 |
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